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chromium / chromium / src / c9f4759554131bdbc6deb09df53a520a6b98cddf / . / chrome / browser / ui / views / tabs / tab_strip.cc
blob: a5db2af4fe81557792876a874dbffa74f8d7bb7b [file] [log] [blame]
// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/views/tabs/tab_strip.h"
#include <stddef.h>
#include <algorithm>
#include <iterator>
#include <string>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/containers/adapters.h"
#include "base/containers/flat_map.h"
#include "base/feature_list.h"
#include "base/macros.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/user_metrics.h"
#include "base/no_destructor.h"
#include "base/stl_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/timer/elapsed_timer.h"
#include "build/build_config.h"
#include "chrome/browser/defaults.h"
#include "chrome/browser/themes/theme_properties.h"
#include "chrome/browser/ui/layout_constants.h"
#include "chrome/browser/ui/tabs/tab_group_theme.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/tabs/tab_types.h"
#include "chrome/browser/ui/ui_features.h"
#include "chrome/browser/ui/view_ids.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "chrome/browser/ui/views/tabs/browser_tab_strip_controller.h"
#include "chrome/browser/ui/views/tabs/new_tab_button.h"
#include "chrome/browser/ui/views/tabs/stacked_tab_strip_layout.h"
#include "chrome/browser/ui/views/tabs/tab.h"
#include "chrome/browser/ui/views/tabs/tab_drag_controller.h"
#include "chrome/browser/ui/views/tabs/tab_group_header.h"
#include "chrome/browser/ui/views/tabs/tab_group_highlight.h"
#include "chrome/browser/ui/views/tabs/tab_group_underline.h"
#include "chrome/browser/ui/views/tabs/tab_group_views.h"
#include "chrome/browser/ui/views/tabs/tab_hover_card_bubble_view.h"
#include "chrome/browser/ui/views/tabs/tab_slot_view.h"
#include "chrome/browser/ui/views/tabs/tab_strip_controller.h"
#include "chrome/browser/ui/views/tabs/tab_strip_layout_helper.h"
#include "chrome/browser/ui/views/tabs/tab_strip_layout_types.h"
#include "chrome/browser/ui/views/tabs/tab_strip_observer.h"
#include "chrome/browser/ui/views/tabs/tab_style_views.h"
#include "chrome/browser/ui/views/touch_uma/touch_uma.h"
#include "chrome/browser/ui/web_applications/app_browser_controller.h"
#include "chrome/grit/generated_resources.h"
#include "chrome/grit/theme_resources.h"
#include "components/tab_groups/tab_group_color.h"
#include "components/tab_groups/tab_group_id.h"
#include "components/tab_groups/tab_group_visual_data.h"
#include "third_party/skia/include/core/SkColorFilter.h"
#include "third_party/skia/include/core/SkPath.h"
#include "third_party/skia/include/effects/SkLayerDrawLooper.h"
#include "third_party/skia/include/pathops/SkPathOps.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/models/list_selection_model.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/theme_provider.h"
#include "ui/display/display.h"
#include "ui/display/screen.h"
#include "ui/gfx/animation/throb_animation.h"
#include "ui/gfx/animation/tween.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/image/image_skia_operations.h"
#include "ui/gfx/skia_util.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/masked_targeter_delegate.h"
#include "ui/views/mouse_watcher_view_host.h"
#include "ui/views/rect_based_targeting_utils.h"
#include "ui/views/view_model_utils.h"
#include "ui/views/view_observer.h"
#include "ui/views/view_targeter.h"
#include "ui/views/widget/root_view.h"
#include "ui/views/widget/widget.h"
#include "ui/views/window/non_client_view.h"
#if defined(OS_WIN)
#include "base/win/windows_version.h"
#include "ui/display/win/screen_win.h"
#include "ui/gfx/win/hwnd_util.h"
#include "ui/views/win/hwnd_util.h"
#endif
#if defined(USE_AURA)
#include "ui/aura/window.h"
#endif
namespace {
// Distance from the next/previous stacked before before we consider the tab
// close enough to trigger moving.
const int kStackedDistance = 36;
// Given the bounds of a dragged tab, return the X coordinate to use for
// computing where in the strip to insert/move the tab.
int GetDraggedX(const gfx::Rect& dragged_bounds) {
return dragged_bounds.x() + TabStyle::GetTabInternalPadding().left();
}
// Max number of stacked tabs.
constexpr int kMaxStackedCount = 4;
// Padding between stacked tabs.
constexpr int kStackedPadding = 6;
// Size of the drop indicator.
int g_drop_indicator_width = 0;
int g_drop_indicator_height = 0;
// The offset in indices when shifting a tab or group in the given direction.
enum ShiftOffset { kLeft = -1, kRight = 1 };
// Listens in on the browser event stream (as a pre target event handler) and
// hides an associated hover card on any keypress.
class TabHoverCardEventSniffer : public ui::EventHandler {
public:
TabHoverCardEventSniffer(TabHoverCardBubbleView* hover_card,
TabStrip* tab_strip)
: hover_card_(hover_card),
tab_strip_(tab_strip),
widget_(tab_strip->GetWidget()) {
#if defined(OS_MACOSX)
if (widget_->GetRootView())
widget_->GetRootView()->AddPreTargetHandler(this);
#else
if (widget_->GetNativeWindow())
widget_->GetNativeWindow()->AddPreTargetHandler(this);
#endif
}
~TabHoverCardEventSniffer() override {
#if defined(OS_MACOSX)
widget_->GetRootView()->RemovePreTargetHandler(this);
#else
widget_->GetNativeWindow()->RemovePreTargetHandler(this);
#endif
}
protected:
// ui::EventTarget:
void OnKeyEvent(ui::KeyEvent* event) override {
if (!tab_strip_->IsFocusInTabs())
tab_strip_->UpdateHoverCard(nullptr);
}
void OnMouseEvent(ui::MouseEvent* event) override {
if (event->IsAnyButton())
hover_card_->FadeOutToHide();
}
void OnGestureEvent(ui::GestureEvent* event) override {
hover_card_->FadeOutToHide();
}
private:
TabHoverCardBubbleView* const hover_card_;
TabStrip* tab_strip_;
views::Widget* widget_;
};
// Animation delegate used for any automatic tab movement. Hides the tab if it
// is not fully visible within the tabstrip area, to prevent overflow clipping.
class TabAnimationDelegate : public gfx::AnimationDelegate {
public:
TabAnimationDelegate(TabStrip* tab_strip, Tab* tab);
~TabAnimationDelegate() override;
void AnimationProgressed(const gfx::Animation* animation) override;
protected:
TabStrip* tab_strip() { return tab_strip_; }
Tab* tab() { return tab_; }
private:
TabStrip* const tab_strip_;
Tab* const tab_;
DISALLOW_COPY_AND_ASSIGN(TabAnimationDelegate);
};
TabAnimationDelegate::TabAnimationDelegate(TabStrip* tab_strip, Tab* tab)
: tab_strip_(tab_strip), tab_(tab) {}
TabAnimationDelegate::~TabAnimationDelegate() {}
void TabAnimationDelegate::AnimationProgressed(
const gfx::Animation* animation) {
tab_->SetVisible(tab_strip_->ShouldTabBeVisible(tab_));
}
// Animation delegate used when a dragged tab is released. When done sets the
// dragging state to false.
class ResetDraggingStateDelegate : public TabAnimationDelegate {
public:
ResetDraggingStateDelegate(TabStrip* tab_strip, Tab* tab);
~ResetDraggingStateDelegate() override;
void AnimationEnded(const gfx::Animation* animation) override;
void AnimationCanceled(const gfx::Animation* animation) override;
private:
DISALLOW_COPY_AND_ASSIGN(ResetDraggingStateDelegate);
};
ResetDraggingStateDelegate::ResetDraggingStateDelegate(TabStrip* tab_strip,
Tab* tab)
: TabAnimationDelegate(tab_strip, tab) {}
ResetDraggingStateDelegate::~ResetDraggingStateDelegate() {}
void ResetDraggingStateDelegate::AnimationEnded(
const gfx::Animation* animation) {
tab()->set_dragging(false);
AnimationProgressed(animation); // Forces tab visibility to update.
}
void ResetDraggingStateDelegate::AnimationCanceled(
const gfx::Animation* animation) {
AnimationEnded(animation);
}
// If |dest| contains the point |point_in_source| the event handler from |dest|
// is returned. Otherwise returns null.
views::View* ConvertPointToViewAndGetEventHandler(
views::View* source,
views::View* dest,
const gfx::Point& point_in_source) {
gfx::Point dest_point(point_in_source);
views::View::ConvertPointToTarget(source, dest, &dest_point);
return dest->HitTestPoint(dest_point)
? dest->GetEventHandlerForPoint(dest_point)
: nullptr;
}
// Gets a tooltip handler for |point_in_source| from |dest|. Note that |dest|
// should return null if it does not contain the point.
views::View* ConvertPointToViewAndGetTooltipHandler(
views::View* source,
views::View* dest,
const gfx::Point& point_in_source) {
gfx::Point dest_point(point_in_source);
views::View::ConvertPointToTarget(source, dest, &dest_point);
return dest->GetTooltipHandlerForPoint(dest_point);
}
TabDragController::EventSource EventSourceFromEvent(
const ui::LocatedEvent& event) {
return event.IsGestureEvent() ? TabDragController::EVENT_SOURCE_TOUCH
: TabDragController::EVENT_SOURCE_MOUSE;
}
int GetStackableTabWidth() {
return TabStyle::GetTabOverlap() +
(ui::TouchUiController::Get()->touch_ui() ? 136 : 102);
}
} // namespace
///////////////////////////////////////////////////////////////////////////////
// TabStrip::RemoveTabDelegate
//
// AnimationDelegate used when removing a tab. Does the necessary cleanup when
// done.
class TabStrip::RemoveTabDelegate : public TabAnimationDelegate {
public:
RemoveTabDelegate(TabStrip* tab_strip, Tab* tab);
void AnimationEnded(const gfx::Animation* animation) override;
void AnimationCanceled(const gfx::Animation* animation) override;
private:
DISALLOW_COPY_AND_ASSIGN(RemoveTabDelegate);
};
TabStrip::RemoveTabDelegate::RemoveTabDelegate(TabStrip* tab_strip, Tab* tab)
: TabAnimationDelegate(tab_strip, tab) {}
void TabStrip::RemoveTabDelegate::AnimationEnded(
const gfx::Animation* animation) {
tab_strip()->OnTabCloseAnimationCompleted(tab());
}
void TabStrip::RemoveTabDelegate::AnimationCanceled(
const gfx::Animation* animation) {
AnimationEnded(animation);
}
///////////////////////////////////////////////////////////////////////////////
// TabStrip::TabDragContextImpl
//
class TabStrip::TabDragContextImpl : public TabDragContext {
public:
explicit TabDragContextImpl(TabStrip* tab_strip) : tab_strip_(tab_strip) {}
bool IsDragStarted() const {
return drag_controller_ && drag_controller_->started_drag();
}
bool IsMutating() const {
return drag_controller_ && drag_controller_->is_mutating();
}
bool IsDraggingWindow() const {
return drag_controller_ && drag_controller_->is_dragging_window();
}
bool IsDraggingTab(content::WebContents* contents) const {
return contents && drag_controller_ &&
drag_controller_->IsDraggingTab(contents);
}
void SetMoveBehavior(TabDragController::MoveBehavior move_behavior) {
if (drag_controller_)
drag_controller_->SetMoveBehavior(move_behavior);
}
void MaybeStartDrag(TabSlotView* source,
const ui::LocatedEvent& event,
const ui::ListSelectionModel& original_selection) {
std::vector<TabSlotView*> dragging_views;
int x = source->GetMirroredXInView(event.x());
int y = event.y();
// Build the set of selected tabs to drag and calculate the offset from the
// source.
ui::ListSelectionModel selection_model;
if (source->GetTabSlotViewType() ==
TabSlotView::ViewType::kTabGroupHeader) {
dragging_views.push_back(source);
const std::vector<int> grouped_tabs =
tab_strip_->controller()->ListTabsInGroup(source->group().value());
for (int index : grouped_tabs) {
dragging_views.push_back(GetTabAt(index));
// Set |selection_model| if and only if the original selection does not
// match the group exactly. See TabDragController::Init() for details
// on how |selection_model| is used.
if (!original_selection.IsSelected(index))
selection_model = original_selection;
}
if (grouped_tabs.size() != original_selection.size())
selection_model = original_selection;
} else {
for (int i = 0; i < GetTabCount(); ++i) {
Tab* other_tab = GetTabAt(i);
if (tab_strip_->IsTabSelected(other_tab)) {
dragging_views.push_back(other_tab);
if (other_tab == source)
x += GetSizeNeededForViews(dragging_views) - other_tab->width();
}
}
if (!original_selection.IsSelected(tab_strip_->GetModelIndexOf(source)))
selection_model = original_selection;
}
DCHECK(!dragging_views.empty());
DCHECK(base::Contains(dragging_views, source));
// Delete the existing DragController before creating a new one. We do this
// as creating the DragController remembers the WebContents delegates and we
// need to make sure the existing DragController isn't still a delegate.
drag_controller_.reset();
TabDragController::MoveBehavior move_behavior = TabDragController::REORDER;
// Use MOVE_VISIBLE_TABS in the following conditions:
// . Mouse event generated from touch and the left button is down (the right
// button corresponds to a long press, which we want to reorder).
// . Gesture tap down and control key isn't down.
// . Real mouse event and control is down. This is mostly for testing.
DCHECK(event.type() == ui::ET_MOUSE_PRESSED ||
event.type() == ui::ET_GESTURE_TAP_DOWN ||
event.type() == ui::ET_GESTURE_SCROLL_BEGIN);
if (tab_strip_->touch_layout_ &&
((event.type() == ui::ET_MOUSE_PRESSED &&
(((event.flags() & ui::EF_FROM_TOUCH) &&
static_cast<const ui::MouseEvent&>(event).IsLeftMouseButton()) ||
(!(event.flags() & ui::EF_FROM_TOUCH) &&
static_cast<const ui::MouseEvent&>(event).IsControlDown()))) ||
(event.type() == ui::ET_GESTURE_TAP_DOWN && !event.IsControlDown()) ||
(event.type() == ui::ET_GESTURE_SCROLL_BEGIN &&
!event.IsControlDown()))) {
move_behavior = TabDragController::MOVE_VISIBLE_TABS;
}
drag_controller_ = std::make_unique<TabDragController>();
drag_controller_->Init(this, source, dragging_views, gfx::Point(x, y),
event.x(), std::move(selection_model), move_behavior,
EventSourceFromEvent(event));
}
void ContinueDrag(views::View* view, const ui::LocatedEvent& event) {
if (drag_controller_.get() &&
drag_controller_->event_source() == EventSourceFromEvent(event)) {
gfx::Point screen_location(event.location());
views::View::ConvertPointToScreen(view, &screen_location);
drag_controller_->Drag(screen_location);
}
}
bool EndDrag(EndDragReason reason) {
if (!drag_controller_.get())
return false;
bool started_drag = drag_controller_->started_drag();
drag_controller_->EndDrag(reason);
return started_drag;
}
// TabDragContext:
views::View* AsView() override { return tab_strip_; }
const views::View* AsView() const override { return tab_strip_; }
Tab* GetTabAt(int i) const override { return tab_strip_->tab_at(i); }
int GetIndexOf(const TabSlotView* view) const override {
return tab_strip_->GetModelIndexOf(view);
}
int GetTabCount() const override { return tab_strip_->tab_count(); }
bool IsTabPinned(const Tab* tab) const override {
return tab_strip_->IsTabPinned(tab);
}
int GetPinnedTabCount() const override {
return tab_strip_->GetPinnedTabCount();
}
TabGroupHeader* GetTabGroupHeader(
const tab_groups::TabGroupId& group) const override {
return tab_strip_->group_header(group);
}
TabStripModel* GetTabStripModel() override {
return static_cast<BrowserTabStripController*>(
tab_strip_->controller_.get())
->model();
}
base::Optional<int> GetActiveTouchIndex() const override {
if (!tab_strip_->touch_layout_)
return base::nullopt;
return tab_strip_->touch_layout_->active_index();
}
TabDragController* GetDragController() override {
return drag_controller_.get();
}
void OwnDragController(TabDragController* controller) override {
// Typically, ReleaseDragController() and OwnDragController() calls are
// paired via corresponding calls to TabDragController::Detach() and
// TabDragController::Attach(). There is one exception to that rule: when a
// drag might start, we create a TabDragController that is owned by the
// potential source tabstrip in MaybeStartDrag(). If a drag actually starts,
// we then call Attach() on the source tabstrip, but since the source
// tabstrip already owns the TabDragController, so we don't need to do
// anything.
if (drag_controller_.get() != controller)
drag_controller_.reset(controller);
}
void DestroyDragController() override {
SetNewTabButtonVisible(true);
drag_controller_.reset();
}
TabDragController* ReleaseDragController() override {
return drag_controller_.release();
}
bool IsDragSessionActive() const override {
return drag_controller_ != nullptr;
}
bool IsActiveDropTarget() const override {
for (int i = 0; i < GetTabCount(); ++i) {
const Tab* const tab = GetTabAt(i);
if (tab->dragging())
return true;
}
return false;
}
std::vector<int> GetTabXCoordinates() const override {
std::vector<int> results;
for (int i = 0; i < GetTabCount(); ++i)
results.push_back(ideal_bounds(i).x());
return results;
}
int GetActiveTabWidth() const override {
return tab_strip_->GetActiveTabWidth();
}
int GetTabAreaWidth() const override { return tab_strip_->GetTabAreaWidth(); }
int GetTabDragAreaWidth() const override {
return tab_strip_->width() - tab_strip_->FrameGrabWidth();
}
int TabDragAreaBeginX() const override {
return tab_strip_->GetMirroredXWithWidthInView(0, GetTabDragAreaWidth());
}
int TabDragAreaEndX() const override {
return TabDragAreaBeginX() + GetTabDragAreaWidth();
}
int GetHorizontalDragThreshold() const override {
constexpr int kHorizontalMoveThreshold = 16; // DIPs.
// Stacked tabs in touch mode don't shrink.
if (tab_strip_->touch_layout_)
return kHorizontalMoveThreshold;
double ratio = double{tab_strip_->GetInactiveTabWidth()} /
TabStyle::GetStandardWidth();
return gfx::ToRoundedInt(ratio * kHorizontalMoveThreshold);
}
int GetInsertionIndexForDraggedBounds(
const gfx::Rect& dragged_bounds,
bool attaching,
int num_dragged_tabs,
bool mouse_has_ever_moved_left,
bool mouse_has_ever_moved_right,
base::Optional<tab_groups::TabGroupId> group) const override {
// If the strip has no tabs, the only position to insert at is 0.
if (!GetTabCount())
return 0;
base::Optional<int> index;
base::Optional<int> touch_index = GetActiveTouchIndex();
if (touch_index) {
index = GetInsertionIndexForDraggedBoundsStacked(
dragged_bounds, mouse_has_ever_moved_left,
mouse_has_ever_moved_right);
if (index) {
// Only move the tab to the left/right if the user actually moved the
// mouse that way. This is necessary as tabs with stacked tabs
// before/after them have multiple drag positions.
if ((index < touch_index && !mouse_has_ever_moved_left) ||
(index > touch_index && !mouse_has_ever_moved_right)) {
index = *touch_index;
}
}
} else {
index = GetInsertionIndexFrom(dragged_bounds, 0, std::move(group));
}
if (!index) {
const int last_tab_right = ideal_bounds(GetTabCount() - 1).right();
index = (dragged_bounds.right() > last_tab_right) ? GetTabCount() : 0;
}
const Tab* last_visible_tab = tab_strip_->GetLastVisibleTab();
int last_insertion_point =
last_visible_tab ? (GetIndexOf(last_visible_tab) + 1) : 0;
if (!attaching) {
// We're not in the process of attaching, so clamp the insertion point to
// keep it within the visible region.
last_insertion_point =
std::max(0, last_insertion_point - num_dragged_tabs);
}
// Ensure the first dragged tab always stays in the visible index range.
return std::min(*index, last_insertion_point);
}
bool ShouldDragToNextStackedTab(
const gfx::Rect& dragged_bounds,
int index,
bool mouse_has_ever_moved_right) const override {
if (index + 1 >= GetTabCount() ||
!tab_strip_->touch_layout_->IsStacked(index + 1) ||
!mouse_has_ever_moved_right)
return false;
int active_x = ideal_bounds(index).x();
int next_x = ideal_bounds(index + 1).x();
int mid_x =
std::min(next_x - kStackedDistance, active_x + (next_x - active_x) / 4);
return GetDraggedX(dragged_bounds) >= mid_x;
}
bool ShouldDragToPreviousStackedTab(
const gfx::Rect& dragged_bounds,
int index,
bool mouse_has_ever_moved_left) const override {
if (index - 1 < tab_strip_->GetPinnedTabCount() ||
!tab_strip_->touch_layout_->IsStacked(index - 1) ||
!mouse_has_ever_moved_left)
return false;
int active_x = ideal_bounds(index).x();
int previous_x = ideal_bounds(index - 1).x();
int mid_x = std::max(previous_x + kStackedDistance,
active_x - (active_x - previous_x) / 4);
return GetDraggedX(dragged_bounds) <= mid_x;
}
void DragActiveTabStacked(const std::vector<int>& initial_positions,
int delta) override {
DCHECK_EQ(GetTabCount(), int{initial_positions.size()});
SetIdealBoundsFromPositions(initial_positions);
tab_strip_->touch_layout_->DragActiveTab(delta);
tab_strip_->CompleteAnimationAndLayout();
}
std::vector<gfx::Rect> CalculateBoundsForDraggedViews(
const std::vector<TabSlotView*>& views) override {
DCHECK(!views.empty());
std::vector<gfx::Rect> bounds;
const int overlap = TabStyle::GetTabOverlap();
int x = 0;
for (const TabSlotView* view : views) {
const int width = view->width();
bounds.push_back(gfx::Rect(x, 0, width, view->height()));
x += width - overlap;
}
return bounds;
}
void SetBoundsForDrag(const std::vector<TabSlotView*>& views,
const std::vector<gfx::Rect>& bounds) override {
tab_strip_->StopAnimating(false);
DCHECK_EQ(views.size(), bounds.size());
for (size_t i = 0; i < views.size(); ++i)
views[i]->SetBoundsRect(bounds[i]);
// Reset the layout size as we've effectively laid out a different size.
// This ensures a layout happens after the drag is done.
tab_strip_->last_layout_size_ = gfx::Size();
}
void StartedDragging(const std::vector<TabSlotView*>& views) override {
// Let the controller know that the user started dragging tabs.
tab_strip_->controller_->OnStartedDragging();
// Hide the new tab button immediately if we didn't originate the drag.
if (!drag_controller_)
SetNewTabButtonVisible(false);
// Reset dragging state of existing tabs.
for (int i = 0; i < GetTabCount(); ++i)
GetTabAt(i)->set_dragging(false);
for (size_t i = 0; i < views.size(); ++i) {
views[i]->set_dragging(true);
tab_strip_->bounds_animator_.StopAnimatingView(views[i]);
}
// Move the dragged tabs to their ideal bounds.
tab_strip_->UpdateIdealBounds();
// Sets the bounds of the dragged tabs.
for (size_t i = 0; i < views.size(); ++i) {
// Non-tabs, such as TabGroupHeaders, may also be dragging. Ignore these,
// since they are positioned independently.
if (views[i]->GetTabSlotViewType() != TabSlotView::ViewType::kTab)
continue;
int tab_data_index = GetIndexOf(views[i]);
DCHECK_NE(TabStripModel::kNoTab, tab_data_index);
views[i]->SetBoundsRect(ideal_bounds(tab_data_index));
}
tab_strip_->SetTabVisibility();
tab_strip_->SchedulePaint();
}
void DraggedTabsDetached() override {
// Let the controller know that the user is not dragging this tabstrip's
// tabs anymore.
tab_strip_->controller_->OnStoppedDragging();
SetNewTabButtonVisible(true);
}
void StoppedDragging(const std::vector<TabSlotView*>& views,
const std::vector<int>& initial_positions,
bool move_only,
bool completed) override {
// Let the controller know that the user stopped dragging tabs.
tab_strip_->controller_->OnStoppedDragging();
SetNewTabButtonVisible(true);
if (move_only && tab_strip_->touch_layout_) {
if (completed)
tab_strip_->touch_layout_->SizeToFit();
else
SetIdealBoundsFromPositions(initial_positions);
}
bool is_first_view = true;
for (size_t i = 0; i < views.size(); ++i)
tab_strip_->StoppedDraggingView(views[i], &is_first_view);
}
void LayoutDraggedViewsAt(const std::vector<TabSlotView*>& views,
TabSlotView* source_view,
const gfx::Point& location,
bool initial_drag) override {
// Immediately hide the new tab button if the last tab is being dragged.
const Tab* last_visible_tab = tab_strip_->GetLastVisibleTab();
if (last_visible_tab && last_visible_tab->dragging())
SetNewTabButtonVisible(false);
std::vector<gfx::Rect> bounds = CalculateBoundsForDraggedViews(views);
DCHECK_EQ(views.size(), bounds.size());
int active_tab_model_index = GetIndexOf(source_view);
int active_tab_index = static_cast<int>(
std::find(views.begin(), views.end(), source_view) - views.begin());
for (size_t i = 0; i < views.size(); ++i) {
TabSlotView* view = views[i];
gfx::Rect new_bounds = bounds[i];
new_bounds.Offset(location.x(), location.y());
int consecutive_index =
active_tab_model_index - (active_tab_index - static_cast<int>(i));
// If this is the initial layout during a drag and the tabs aren't
// consecutive animate the view into position. Do the same if the tab is
// already animating (which means we previously caused it to animate).
if ((initial_drag && GetIndexOf(views[i]) != consecutive_index) ||
tab_strip_->bounds_animator_.IsAnimating(views[i])) {
tab_strip_->bounds_animator_.SetTargetBounds(views[i], new_bounds);
} else {
view->SetBoundsRect(new_bounds);
}
}
tab_strip_->SetTabVisibility();
}
// Forces the entire tabstrip to lay out.
void ForceLayout() override {
tab_strip_->InvalidateLayout();
tab_strip_->CompleteAnimationAndLayout();
}
private:
gfx::Rect ideal_bounds(int i) const { return tab_strip_->ideal_bounds(i); }
void SetNewTabButtonVisible(bool visible) {
tab_strip_->new_tab_button_->SetVisible(visible);
}
// Used by GetInsertionIndexForDraggedBounds() when the tabstrip is stacked.
base::Optional<int> GetInsertionIndexForDraggedBoundsStacked(
const gfx::Rect& dragged_bounds,
bool mouse_has_ever_moved_left,
bool mouse_has_ever_moved_right) const {
int active_index = *GetActiveTouchIndex();
// Search from the active index to the front of the tabstrip. Do this as
// tabs overlap each other from the active index.
base::Optional<int> index =
GetInsertionIndexFromReversed(dragged_bounds, active_index);
if (index != active_index)
return index;
if (!index)
return GetInsertionIndexFrom(dragged_bounds, active_index + 1,
base::nullopt);
// The position to drag to corresponds to the active tab. If the
// next/previous tab is stacked, then shorten the distance used to determine
// insertion bounds. We do this as GetInsertionIndexFrom() uses the bounds
// of the tabs. When tabs are stacked the next/previous tab is on top of the
// tab.
if (active_index + 1 < GetTabCount() &&
tab_strip_->touch_layout_->IsStacked(active_index + 1)) {
index = GetInsertionIndexFrom(dragged_bounds, active_index + 1,
base::nullopt);
if (!index && ShouldDragToNextStackedTab(dragged_bounds, active_index,
mouse_has_ever_moved_right))
index = active_index + 1;
else if (index == -1)
index = active_index;
} else if (ShouldDragToPreviousStackedTab(dragged_bounds, active_index,
mouse_has_ever_moved_left)) {
index = active_index - 1;
}
return index;
}
// Determines the index to insert tabs at. |dragged_bounds| is the bounds of
// the tab being dragged, |start| is the index of the tab to start looking
// from, and |group| is the currently dragged group, if any. The search
// proceeds to the end of the strip.
base::Optional<int> GetInsertionIndexFrom(
const gfx::Rect& dragged_bounds,
int start,
base::Optional<tab_groups::TabGroupId> group) const {
const int last_tab = GetTabCount() - 1;
const int dragged_x = GetDraggedX(dragged_bounds);
if (start < 0 || start > last_tab || dragged_x < ideal_bounds(start).x() ||
dragged_x > ideal_bounds(last_tab).right())
return base::nullopt;
base::Optional<int> insertion_index;
for (int i = start; i <= last_tab; ++i) {
if (dragged_x < ideal_bounds(i).CenterPoint().x()) {
insertion_index = i;
break;
}
}
if (!insertion_index.has_value())
return last_tab + 1;
return GetInsertionIndexWithGroup(dragged_bounds, insertion_index.value(),
std::move(group));
}
// Like GetInsertionIndexFrom(), but searches backwards from |start| to the
// beginning of the strip.
base::Optional<int> GetInsertionIndexFromReversed(
const gfx::Rect& dragged_bounds,
int start) const {
const int dragged_x = GetDraggedX(dragged_bounds);
if (start < 0 || start >= GetTabCount() ||
dragged_x >= ideal_bounds(start).right() ||
dragged_x < ideal_bounds(0).x())
return base::nullopt;
for (int i = start; i >= 0; --i) {
if (dragged_x >= ideal_bounds(i).CenterPoint().x())
return i + 1;
}
return 0;
}
// Determines the index to insert at, accounting for the dragging group and
// other groups. |dragged_bounds| is the bounds of the tab being dragged,
// |candidate_index| is the naive insertion index found via
// GetInsertionIndexFrom, and |dragging_group| is the currently dragged
// group, if any. This is distinct from the group membership of the dragging
// tabs, and is only set when dragging by the group's header.
int GetInsertionIndexWithGroup(
const gfx::Rect& dragged_bounds,
int candidate_index,
base::Optional<tab_groups::TabGroupId> dragging_group) const {
if (!dragging_group.has_value())
return candidate_index;
const std::vector<int> dragging_tabs =
tab_strip_->controller()->ListTabsInGroup(dragging_group.value());
base::Optional<tab_groups::TabGroupId> other_group =
tab_strip_->tab_at(candidate_index)->group();
// The other group will be the same as the dragging group if the user
// hasn't dragged beyond the boundaries of the current "gap". In this
// case, look ahead to where the dragging group would go, and sample
// the group that's currently there.
if (dragging_group == other_group) {
// |dragging_tabs| can only be empty if dragging in from another window,
// in which case |dragging_group| can't be the same as |other_group|.
DCHECK(dragging_tabs.size() > 0);
if (candidate_index <= dragging_tabs.front() ||
dragging_tabs.back() >= GetTabCount() - 1)
return dragging_tabs.front();
other_group = tab_strip_->tab_at(dragging_tabs.back() + 1)->group();
}
if (!other_group.has_value())
return candidate_index;
const std::vector<int> other_tabs =
tab_strip_->controller()->ListTabsInGroup(other_group.value());
if (other_tabs.size() == 0)
return candidate_index;
// If the candidate index is in the middle of the other group, instead
// return the nearest insertion index that is not in the other group.
const int other_group_width =
ideal_bounds(other_tabs.back()).right() -
tab_strip_->group_header(other_group.value())->x();
int left_insertion_index = other_tabs.front();
if (dragging_tabs.size() > 0 && dragging_tabs.front() < other_tabs.front())
left_insertion_index = dragging_tabs.front();
if (GetDraggedX(dragged_bounds) <
ideal_bounds(left_insertion_index).x() + other_group_width / 2)
return left_insertion_index;
return left_insertion_index + other_tabs.size();
}
// Sets the ideal bounds x-coordinates to |positions|.
void SetIdealBoundsFromPositions(const std::vector<int>& positions) {
if (static_cast<size_t>(GetTabCount()) != positions.size())
return;
for (int i = 0; i < GetTabCount(); ++i) {
gfx::Rect bounds(ideal_bounds(i));
bounds.set_x(positions[i]);
tab_strip_->tabs_.set_ideal_bounds(i, bounds);
}
}
TabStrip* const tab_strip_;
// The controller for a drag initiated from a Tab. Valid for the lifetime of
// the drag session.
std::unique_ptr<TabDragController> drag_controller_;
};
///////////////////////////////////////////////////////////////////////////////
// TabStrip, public:
TabStrip::TabStrip(std::unique_ptr<TabStripController> controller)
: controller_(std::move(controller)),
layout_helper_(std::make_unique<TabStripLayoutHelper>(
controller_.get(),
base::BindRepeating(&TabStrip::tabs_view_model,
base::Unretained(this)),
base::BindRepeating(&TabStrip::GetGroupHeaders,
base::Unretained(this)),
base::BindRepeating(&TabStrip::LayoutToCurrentBounds,
base::Unretained(this)))),
drag_context_(std::make_unique<TabDragContextImpl>(this)) {
Init();
SetEventTargeter(std::make_unique<views::ViewTargeter>(this));
}
TabStrip::~TabStrip() {
// The animations may reference the tabs. Shut down the animation before we
// delete the tabs.
StopAnimating(false);
// Disengage the drag controller before doing any additional cleanup. This
// call can interact with child views so we can't reliably do it during member
// destruction.
drag_context_->DestroyDragController();
// Make sure we unhook ourselves as a message loop observer so that we don't
// crash in the case where the user closes the window after closing a tab
// but before moving the mouse.
RemoveMessageLoopObserver();
new_tab_button_->RemoveObserver(this);
hover_card_observer_.RemoveAll();
// The children (tabs) may callback to us from their destructor. Delete them
// so that if they call back we aren't in a weird state.
RemoveAllChildViews(true);
}
// static
int TabStrip::GetSizeNeededForViews(const std::vector<TabSlotView*>& views) {
int width = 0;
for (const TabSlotView* view : views)
width += view->width();
if (!views.empty())
width -= TabStyle::GetTabOverlap() * (views.size() - 1);
return width;
}
void TabStrip::AddObserver(TabStripObserver* observer) {
observers_.AddObserver(observer);
}
void TabStrip::RemoveObserver(TabStripObserver* observer) {
observers_.RemoveObserver(observer);
}
void TabStrip::FrameColorsChanged() {
for (int i = 0; i < tab_count(); ++i)
tab_at(i)->FrameColorsChanged();
new_tab_button_->FrameColorsChanged();
UpdateContrastRatioValues();
SchedulePaint();
}
void TabStrip::SetBackgroundOffset(int background_offset) {
if (background_offset != background_offset_) {
background_offset_ = background_offset;
SchedulePaint();
}
}
bool TabStrip::IsRectInWindowCaption(const gfx::Rect& rect) {
// If there is no control at this location, the hit is in the caption area.
const views::View* v = GetEventHandlerForRect(rect);
if (v == this)
return true;
// When the window has a top drag handle, a thin strip at the top of inactive
// tabs and the new tab button is treated as part of the window drag handle,
// to increase draggability. This region starts 1 DIP above the top of the
// separator.
const int drag_handle_extension = TabStyle::GetDragHandleExtension(height());
// Disable drag handle extension when tab shapes are visible.
bool extend_drag_handle = !controller_->IsFrameCondensed() &&
!controller_->EverHasVisibleBackgroundTabShapes();
// A hit on the tab is not in the caption unless it is in the thin strip
// mentioned above.
const int tab_index = tabs_.GetIndexOfView(v);
if (IsValidModelIndex(tab_index)) {
Tab* tab = tab_at(tab_index);
gfx::Rect tab_drag_handle = tab->GetMirroredBounds();
tab_drag_handle.set_height(drag_handle_extension);
return extend_drag_handle && !tab->IsActive() &&
tab_drag_handle.Intersects(rect);
}
// Similarly, a hit in the new tab button is considered to be in the caption
// if it's in this thin strip.
gfx::Rect new_tab_button_drag_handle = new_tab_button_->GetMirroredBounds();
new_tab_button_drag_handle.set_height(drag_handle_extension);
if (extend_drag_handle && new_tab_button_drag_handle.Intersects(rect))
return true;
// Check to see if the rect intersects the non-button parts of the new tab
// button. The button has a non-rectangular shape, so if it's not in the
// visual portions of the button we treat it as a click to the caption.
gfx::RectF rect_in_new_tab_coords_f(rect);
View::ConvertRectToTarget(this, new_tab_button_, &rect_in_new_tab_coords_f);
gfx::Rect rect_in_new_tab_coords =
gfx::ToEnclosingRect(rect_in_new_tab_coords_f);
return new_tab_button_->GetLocalBounds().Intersects(rect_in_new_tab_coords) &&
!new_tab_button_->HitTestRect(rect_in_new_tab_coords);
}
bool TabStrip::IsPositionInWindowCaption(const gfx::Point& point) {
return IsRectInWindowCaption(gfx::Rect(point, gfx::Size(1, 1)));
}
bool TabStrip::IsTabStripCloseable() const {
return !drag_context_->IsDragSessionActive();
}
bool TabStrip::IsTabStripEditable() const {
return !drag_context_->IsDragSessionActive() &&
!drag_context_->IsActiveDropTarget();
}
bool TabStrip::IsTabCrashed(int tab_index) const {
return tab_at(tab_index)->data().IsCrashed();
}
bool TabStrip::TabHasNetworkError(int tab_index) const {
return tab_at(tab_index)->data().network_state == TabNetworkState::kError;
}
base::Optional<TabAlertState> TabStrip::GetTabAlertState(int tab_index) const {
return Tab::GetAlertStateToShow(tab_at(tab_index)->data().alert_state);
}
void TabStrip::UpdateLoadingAnimations(const base::TimeDelta& elapsed_time) {
for (int i = 0; i < tab_count(); i++)
tab_at(i)->StepLoadingAnimation(elapsed_time);
}
void TabStrip::SetStackedLayout(bool stacked_layout) {
if (stacked_layout == stacked_layout_)
return;
stacked_layout_ = stacked_layout;
SetResetToShrinkOnExit(false);
SwapLayoutIfNecessary();
// When transitioning to stacked try to keep the active tab from moving.
const int active_index = controller_->GetActiveIndex();
if (touch_layout_ && active_index != -1) {
touch_layout_->SetActiveTabLocation(ideal_bounds(active_index).x());
AnimateToIdealBounds();
}
for (int i = 0; i < tab_count(); ++i)
tab_at(i)->Layout();
}
void TabStrip::AddTabAt(int model_index, TabRendererData data, bool is_active) {
Tab* tab = new Tab(this);
tab->set_context_menu_controller(&context_menu_controller_);
tab->AddObserver(this);
AddChildViewAt(tab, GetViewInsertionIndex(tab, base::nullopt, model_index));
const bool pinned = data.pinned;
tabs_.Add(tab, model_index);
selected_tabs_.IncrementFrom(model_index);
// Setting data must come after all state from the model has been updated
// above for the tab. Accessibility, in particular, reacts to data changed
// callbacks.
tab->SetData(std::move(data));
if (touch_layout_) {
int add_types = 0;
if (pinned)
add_types |= StackedTabStripLayout::kAddTypePinned;
if (is_active)
add_types |= StackedTabStripLayout::kAddTypeActive;
touch_layout_->AddTab(model_index, add_types,
UpdateIdealBoundsForPinnedTabs(nullptr));
}
// Don't animate the first tab, it looks weird, and don't animate anything
// if the containing window isn't visible yet.
if (tab_count() > 1 && GetWidget() && GetWidget()->IsVisible()) {
StartInsertTabAnimation(model_index,
pinned ? TabPinned::kPinned : TabPinned::kUnpinned);
} else {
layout_helper_->InsertTabAtNoAnimation(
model_index, tab,
base::BindOnce(&TabStrip::OnTabCloseAnimationCompleted,
base::Unretained(this), base::Unretained(tab)),
pinned ? TabPinned::kPinned : TabPinned::kUnpinned);
CompleteAnimationAndLayout();
}
SwapLayoutIfNecessary();
UpdateAccessibleTabIndices();
for (TabStripObserver& observer : observers_)
observer.OnTabAdded(model_index);
// Stop dragging when a new tab is added and dragging a window. Doing
// otherwise results in a confusing state if the user attempts to reattach. We
// could allow this and make TabDragController update itself during the add,
// but this comes up infrequently enough that it's not worth the complexity.
//
// At the start of AddTabAt() the model and tabs are out sync. Any queries to
// find a tab given a model index can go off the end of |tabs_|. As such, it
// is important that we complete the drag *after* adding the tab so that the
// model and tabstrip are in sync.
if (!drag_context_->IsMutating() && drag_context_->IsDraggingWindow())
EndDrag(END_DRAG_COMPLETE);
Profile* profile = controller()->GetProfile();
if (profile) {
if (profile->IsGuestSession())
base::UmaHistogramCounts100("Tab.Count.Guest", tab_count());
else if (profile->IsIncognitoProfile())
base::UmaHistogramCounts100("Tab.Count.Incognito", tab_count());
}
}
void TabStrip::MoveTab(int from_model_index,
int to_model_index,
TabRendererData data) {
DCHECK_GT(tabs_.view_size(), 0);
const Tab* last_tab = GetLastVisibleTab();
Tab* moving_tab = tab_at(from_model_index);
const bool pinned = data.pinned;
moving_tab->SetData(std::move(data));
ReorderChildView(
moving_tab,
GetViewInsertionIndex(moving_tab, from_model_index, to_model_index));
if (touch_layout_) {
tabs_.MoveViewOnly(from_model_index, to_model_index);
int pinned_count = 0;
const int start_x = UpdateIdealBoundsForPinnedTabs(&pinned_count);
touch_layout_->MoveTab(from_model_index, to_model_index,
controller_->GetActiveIndex(), start_x,
pinned_count);
} else {
tabs_.Move(from_model_index, to_model_index);
}
selected_tabs_.Move(from_model_index, to_model_index, /*length=*/1);
layout_helper_->MoveTab(moving_tab->group(), from_model_index,
to_model_index);
layout_helper_->SetTabPinned(
to_model_index, pinned ? TabPinned::kPinned : TabPinned::kUnpinned);
StartMoveTabAnimation();
if (TabDragController::IsAttachedTo(GetDragContext()) &&
(last_tab != GetLastVisibleTab() || last_tab->dragging())) {
new_tab_button_->SetVisible(false);
}
SwapLayoutIfNecessary();
UpdateAccessibleTabIndices();
for (TabStripObserver& observer : observers_)
observer.OnTabMoved(from_model_index, to_model_index);
}
void TabStrip::RemoveTabAt(content::WebContents* contents,
int model_index,
bool was_active) {
StartRemoveTabAnimation(model_index, was_active);
SwapLayoutIfNecessary();
UpdateAccessibleTabIndices();
UpdateHoverCard(nullptr);
for (TabStripObserver& observer : observers_)
observer.OnTabRemoved(model_index);
// Stop dragging when a new tab is removed and dragging a window. Doing
// otherwise results in a confusing state if the user attempts to reattach. We
// could allow this and make TabDragController update itself during the
// remove operation, but this comes up infrequently enough that it's not worth
// the complexity.
//
// At the start of RemoveTabAt() the model and tabs are out sync. Any queries
// to find a tab given a model index can go off the end of |tabs_|. As such,
// it is important that we complete the drag *after* removing the tab so that
// the model and tabstrip are in sync.
if (!drag_context_->IsMutating() && drag_context_->IsDraggingTab(contents))
EndDrag(END_DRAG_COMPLETE);
}
void TabStrip::SetTabData(int model_index, TabRendererData data) {
Tab* tab = tab_at(model_index);
const bool pinned_state_changed = tab->data().pinned != data.pinned;
tab->SetData(std::move(data));
if (HoverCardIsShowingForTab(tab))
UpdateHoverCard(tab);
if (pinned_state_changed) {
if (touch_layout_) {
int pinned_tab_count = 0;
int start_x = UpdateIdealBoundsForPinnedTabs(&pinned_tab_count);
touch_layout_->SetXAndPinnedCount(start_x, pinned_tab_count);
}
layout_helper_->SetTabPinned(
model_index, data.pinned ? TabPinned::kPinned : TabPinned::kUnpinned);
if (GetWidget() && GetWidget()->IsVisible())
StartPinnedTabAnimation();
else
CompleteAnimationAndLayout();
}
SwapLayoutIfNecessary();
}
void TabStrip::AddTabToGroup(base::Optional<tab_groups::TabGroupId> group,
int model_index) {
tab_at(model_index)->set_group(std::move(group));
}
void TabStrip::OnGroupCreated(const tab_groups::TabGroupId& group) {
std::unique_ptr<TabGroupViews> group_view =
std::make_unique<TabGroupViews>(this, group);
AddChildView(group_view->header());
AddChildView(group_view->highlight());
AddChildView(group_view->underline());
layout_helper_->InsertGroupHeader(
group, group_view->header(),
base::BindOnce(&TabStrip::OnGroupCloseAnimationCompleted,
base::Unretained(this), group));
group_views_[group] = std::move(group_view);
}
void TabStrip::OnGroupContentsChanged(const tab_groups::TabGroupId& group) {
DCHECK(group_views_[group]);
// The group header may be in the wrong place if the tab didn't actually
// move in terms of model indices.
OnGroupMoved(group);
group_views_[group]->UpdateVisuals();
UpdateIdealBounds();
AnimateToIdealBounds();
}
void TabStrip::OnGroupVisualsChanged(const tab_groups::TabGroupId& group) {
DCHECK(group_views_[group]);
group_views_[group]->UpdateVisuals();
// The group title may have changed size, so update bounds.
UpdateIdealBounds();
AnimateToIdealBounds();
}
void TabStrip::OnGroupMoved(const tab_groups::TabGroupId& group) {
DCHECK(group_views_[group]);
layout_helper_->UpdateGroupHeaderIndex(group);
TabGroupHeader* group_header = group_views_[group]->header();
const int first_tab = controller_->ListTabsInGroup(group).front();
const int header_index = GetIndexOf(group_header);
const int first_tab_index = GetIndexOf(tab_at(first_tab));
// The header should be just before the first tab. If it isn't, reorder the
// header such that it is. Note that the index to reorder to is different
// depending on whether the header is before or after the tab, since the
// header itself occupies an index.
if (header_index < first_tab_index - 1)
ReorderChildView(group_header, first_tab_index - 1);
if (header_index > first_tab_index - 1)
ReorderChildView(group_header, first_tab_index);
}
void TabStrip::OnGroupClosed(const tab_groups::TabGroupId& group) {
bounds_animator_.StopAnimatingView(group_header(group));
layout_helper_->RemoveGroupHeader(group);
UpdateIdealBounds();
AnimateToIdealBounds();
// The group_views_ mapping is erased in OnGroupCloseAnimationCompleted().
}
void TabStrip::ShiftGroupLeft(const tab_groups::TabGroupId& group) {
ShiftGroupRelative(group, -1);
}
void TabStrip::ShiftGroupRight(const tab_groups::TabGroupId& group) {
ShiftGroupRelative(group, 1);
}
bool TabStrip::ShouldTabBeVisible(const Tab* tab) const {
// Detached tabs should always be invisible (as they close).
if (tab->detached())
return false;
// When stacking tabs, all tabs should always be visible.
if (stacked_layout_)
return true;
// If the tab is currently clipped by the trailing edge of the strip, it
// shouldn't be visible.
const int right_edge = tab->bounds().right();
const int tabstrip_right = tab->dragging()
? drag_context_->GetTabDragAreaWidth()
: GetTabAreaWidth();
if (right_edge > tabstrip_right)
return false;
// Non-clipped dragging tabs should always be visible.
if (tab->dragging())
return true;
// Let all non-clipped closing tabs be visible. These will probably finish
// closing before the user changes the active tab, so there's little reason to
// try and make the more complex logic below apply.
if (tab->closing())
return true;
// Now we need to check whether the tab isn't currently clipped, but could
// become clipped if we changed the active tab, widening either this tab or
// the tabstrip portion before it.
// Pinned tabs don't change size when activated, so any tab in the pinned tab
// region is safe.
if (tab->data().pinned)
return true;
// If the active tab is on or before this tab, we're safe.
if (controller_->GetActiveIndex() <= GetModelIndexOf(tab))
return true;
// We need to check what would happen if the active tab were to move to this
// tab or before.
return (right_edge + GetActiveTabWidth() - GetInactiveTabWidth()) <=
tabstrip_right;
}
bool TabStrip::ShouldDrawStrokes() const {
// If the controller says we can't draw strokes, don't.
if (!controller_->CanDrawStrokes())
return false;
// The tabstrip normally avoids strokes and relies on the active tab
// contrasting sufficiently with the frame background. When there isn't
// enough contrast, fall back to a stroke. Always compute the contrast ratio
// against the active frame color, to avoid toggling the stroke on and off as
// the window activation state changes.
constexpr float kMinimumContrastRatioForOutlines = 1.3f;
const SkColor background_color = GetTabBackgroundColor(
TabActive::kActive, BrowserFrameActiveState::kActive);
const SkColor frame_color =
controller_->GetFrameColor(BrowserFrameActiveState::kActive);
const float contrast_ratio =
color_utils::GetContrastRatio(background_color, frame_color);
if (contrast_ratio < kMinimumContrastRatioForOutlines)
return true;
// Don't want to have to run a full feature query every time this function is
// called.
static const bool tab_outlines_in_low_contrast =
base::FeatureList::IsEnabled(features::kTabOutlinesInLowContrastThemes);
if (tab_outlines_in_low_contrast) {
constexpr float kMinimumAbsoluteContrastForOutlines = 0.2f;
const float background_luminance =
color_utils::GetRelativeLuminance(background_color);
const float frame_luminance =
color_utils::GetRelativeLuminance(frame_color);
const float contrast_difference =
std::fabs(background_luminance - frame_luminance);
if (contrast_difference < kMinimumAbsoluteContrastForOutlines)
return true;
}
return false;
}
void TabStrip::SetSelection(const ui::ListSelectionModel& new_selection) {
if (selected_tabs_.active() != new_selection.active()) {
if (selected_tabs_.active() >= 0)
tab_at(selected_tabs_.active())->ActiveStateChanged();
if (new_selection.active() >= 0)
tab_at(new_selection.active())->ActiveStateChanged();
layout_helper_->SetActiveTab(selected_tabs_.active(),
new_selection.active());
}
if (touch_layout_) {
touch_layout_->SetActiveIndex(new_selection.active());
// Only start an animation if we need to. Otherwise clicking on an
// unselected tab and dragging won't work because dragging is only allowed
// if not animating.
if (!views::ViewModelUtils::IsAtIdealBounds(tabs_))
AnimateToIdealBounds();
SchedulePaint();
} else {
if (GetActiveTabWidth() == GetInactiveTabWidth()) {
// When tabs are wide enough, selecting a new tab cannot change the
// ideal bounds, so only a repaint is necessary.
SchedulePaint();
} else if (bounds_animator_.IsAnimating()) {
// The selection change will have modified the ideal bounds of the tabs
// in |selected_tabs_| and |new_selection|. We need to recompute.
// Note: This is safe even if we're in the midst of mouse-based tab
// closure--we won't expand the tabstrip back to the full window
// width--because PrepareForCloseAt() will have set
// |override_available_width_for_tabs_| already.
UpdateIdealBounds();
AnimateToIdealBounds();
} else if (!layout_helper_->IsAnimating()) {
// As in the animating case above, the selection change will have
// affected the desired bounds of the tabs, but since we're not animating
// we can just snap to the new bounds.
CompleteAnimationAndLayout();
}
}
// Use STLSetDifference to get the indices of elements newly selected
// and no longer selected, since selected_indices() is always sorted.
ui::ListSelectionModel::SelectedIndices no_longer_selected =
base::STLSetDifference<ui::ListSelectionModel::SelectedIndices>(
selected_tabs_.selected_indices(), new_selection.selected_indices());
ui::ListSelectionModel::SelectedIndices newly_selected =
base::STLSetDifference<ui::ListSelectionModel::SelectedIndices>(
new_selection.selected_indices(), selected_tabs_.selected_indices());
tab_at(new_selection.active())
->NotifyAccessibilityEvent(ax::mojom::Event::kSelection, true);
selected_tabs_ = new_selection;
UpdateHoverCard(nullptr);
// The hover cards seen count is reset when the active tab is changed by any
// event. Note TabStrip::SelectTab does not capture tab changes triggered by
// the keyboard.
if (base::FeatureList::IsEnabled(features::kTabHoverCards) && hover_card_)
hover_card_->reset_hover_cards_seen_count();
// Notify all tabs whose selected state changed.
for (auto tab_index :
base::STLSetUnion<ui::ListSelectionModel::SelectedIndices>(
no_longer_selected, newly_selected)) {
tab_at(tab_index)->SelectedStateChanged();
}
}
void TabStrip::OnWidgetActivationChanged(views::Widget* widget, bool active) {
if (active && selected_tabs_.active() >= 0) {
// When the browser window is activated, fire a selection event on the
// currently active tab, to help enable per-tab modes in assistive
// technologies.
tab_at(selected_tabs_.active())
->NotifyAccessibilityEvent(ax::mojom::Event::kSelection, true);
}
}
void TabStrip::SetTabNeedsAttention(int model_index, bool attention) {
tab_at(model_index)->SetTabNeedsAttention(attention);
}
int TabStrip::GetModelIndexOf(const TabSlotView* view) const {
return tabs_.GetIndexOfView(view);
}
int TabStrip::GetModelCount() const {
return controller_->GetCount();
}
bool TabStrip::IsValidModelIndex(int model_index) const {
return controller_->IsValidIndex(model_index);
}
TabDragContext* TabStrip::GetDragContext() {
return drag_context_.get();
}
int TabStrip::GetPinnedTabCount() const {
return layout_helper_->GetPinnedTabCount();
}
bool TabStrip::IsAnimating() const {
return bounds_animator_.IsAnimating() || layout_helper_->IsAnimating();
}
void TabStrip::StopAnimating(bool layout) {
if (!IsAnimating())
return;
bounds_animator_.Cancel();
layout_helper_->CompleteAnimations();
if (layout)
CompleteAnimationAndLayout();
}
base::Optional<int> TabStrip::GetFocusedTabIndex() const {
for (int i = 0; i < tabs_.view_size(); ++i) {
if (tabs_.view_at(i)->HasFocus())
return i;
}
return base::nullopt;
}
const ui::ListSelectionModel& TabStrip::GetSelectionModel() const {
return controller_->GetSelectionModel();
}
bool TabStrip::SupportsMultipleSelection() {
// Currently we only allow single selection in touch layout mode.
return touch_layout_ == nullptr;
}
bool TabStrip::ShouldHideCloseButtonForTab(Tab* tab) const {
if (tab->IsActive())
return false;
return !!touch_layout_;
}
void TabStrip::SelectTab(Tab* tab, const ui::Event& event) {
int model_index = GetModelIndexOf(tab);
if (IsValidModelIndex(model_index)) {
if (!tab->IsActive()) {
int current_selection = selected_tabs_.active();
base::UmaHistogramSparse("Tabs.DesktopTabOffsetOfSwitch",
current_selection - model_index);
base::UmaHistogramSparse("Tabs.DesktopTabOffsetFromLeftOfSwitch",
model_index);
base::UmaHistogramSparse("Tabs.DesktopTabOffsetFromRightOfSwitch",
GetModelCount() - model_index - 1);
if (tab->group().has_value()) {
base::RecordAction(
base::UserMetricsAction("TabGroups_SwitchGroupedTab"));
}
}
// Report histogram metrics for the number of tab hover cards seen before
// a tab is selected by mouse press.
if (base::FeatureList::IsEnabled(features::kTabHoverCards) && hover_card_ &&
event.type() == ui::ET_MOUSE_PRESSED && !tab->IsActive()) {
hover_card_->RecordHoverCardsSeenRatioMetric();
}
controller_->SelectTab(model_index, event);
}
}
void TabStrip::ExtendSelectionTo(Tab* tab) {
int model_index = GetModelIndexOf(tab);
if (IsValidModelIndex(model_index))
controller_->ExtendSelectionTo(model_index);
}
void TabStrip::ToggleSelected(Tab* tab) {
int model_index = GetModelIndexOf(tab);
if (IsValidModelIndex(model_index))
controller_->ToggleSelected(model_index);
}
void TabStrip::AddSelectionFromAnchorTo(Tab* tab) {
int model_index = GetModelIndexOf(tab);
if (IsValidModelIndex(model_index))
controller_->AddSelectionFromAnchorTo(model_index);
}
void TabStrip::CloseTab(Tab* tab, CloseTabSource source) {
int model_index = GetModelIndexOf(tab);
if (tab->closing()) {
// If the tab is already closing, close the next tab. We do this so that the
// user can rapidly close tabs by clicking the close button and not have
// the animations interfere with that.
std::vector<Tab*> all_tabs = layout_helper_->GetTabs();
auto it = std::find(all_tabs.begin(), all_tabs.end(), tab);
while (it < all_tabs.end() && (*it)->closing()) {
it++;
}
model_index =
it != all_tabs.end() ? GetModelIndexOf(*it) : TabStripModel::kNoTab;
}
if (!IsValidModelIndex(model_index))
return;
// If we're not allowed to close this tab for whatever reason, we should not
// proceed.
if (!controller_->BeforeCloseTab(model_index, source))
return;
if (!in_tab_close_ && IsAnimating()) {
// Cancel any current animations. We do this as remove uses the current
// ideal bounds and we need to know ideal bounds is in a good state.
StopAnimating(true);
}
if (GetWidget()) {
in_tab_close_ = true;
resize_layout_timer_.Stop();
if (source == CLOSE_TAB_FROM_TOUCH)
StartResizeLayoutTabsFromTouchTimer();
else
AddMessageLoopObserver();
}
UpdateHoverCard(nullptr);
if (tab->group().has_value())
base::RecordAction(base::UserMetricsAction("CloseGroupedTab"));
controller_->CloseTab(model_index);
}
void TabStrip::ShiftTabLeft(Tab* tab) {
ShiftTabRelative(tab, ShiftOffset::kLeft);
}
void TabStrip::ShiftTabRight(Tab* tab) {
ShiftTabRelative(tab, ShiftOffset::kRight);
}
void TabStrip::MoveTabFirst(Tab* tab) {
if (tab->closing())
return;
const int start_index = GetModelIndexOf(tab);
if (!IsValidModelIndex(start_index))
return;
int target_index = 0;
if (!controller_->IsTabPinned(start_index)) {
while (target_index < start_index && controller_->IsTabPinned(target_index))
++target_index;
}
if (!IsValidModelIndex(target_index))
return;
if (target_index == start_index) {
// Even if the tab is already at the front, it may be able to "move" out of
// its current group.
if (tab->group().has_value())
controller_->RemoveTabFromGroup(target_index);
return;
}
controller_->MoveTab(start_index, target_index);
// The tab may unintentionally land in the first group in the tab strip, so we
// remove the group to ensure consistent behavior.
if (tab->group().has_value())
controller_->RemoveTabFromGroup(target_index);
}
void TabStrip::MoveTabLast(Tab* tab) {
if (tab->closing())
return;
const int start_index = GetModelIndexOf(tab);
if (!IsValidModelIndex(start_index))
return;
int target_index;
if (controller_->IsTabPinned(start_index)) {
int temp_index = start_index + 1;
while (temp_index < tab_count() && controller_->IsTabPinned(temp_index))
++temp_index;
target_index = temp_index - 1;
} else {
target_index = tab_count() - 1;
}
if (!IsValidModelIndex(target_index))
return;
if (target_index == start_index) {
// Even if the tab is already at the back, it may be able to "move" out of
// its current group.
if (tab->group().has_value())
controller_->RemoveTabFromGroup(target_index);
return;
}
controller_->MoveTab(start_index, target_index);
// The tab may unintentionally land in the last group in the tab strip, so we
// remove the group to ensure consistent behavior.
if (tab->group().has_value())
controller_->RemoveTabFromGroup(target_index);
}
void TabStrip::ShowContextMenuForTab(Tab* tab,
const gfx::Point& p,
ui::MenuSourceType source_type) {
controller_->ShowContextMenuForTab(tab, p, source_type);
}
bool TabStrip::IsActiveTab(const Tab* tab) const {
int model_index = GetModelIndexOf(tab);
return IsValidModelIndex(model_index) &&
controller_->IsActiveTab(model_index);
}
bool TabStrip::IsTabSelected(const Tab* tab) const {
int model_index = GetModelIndexOf(tab);
return IsValidModelIndex(model_index) &&
controller_->IsTabSelected(model_index);
}
bool TabStrip::IsTabPinned(const Tab* tab) const {
if (tab->closing())
return false;
int model_index = GetModelIndexOf(tab);
return IsValidModelIndex(model_index) &&
controller_->IsTabPinned(model_index);
}
bool TabStrip::IsFirstVisibleTab(const Tab* tab) const {
return GetModelIndexOf(tab) == 0;
}
bool TabStrip::IsLastVisibleTab(const Tab* tab) const {
return GetLastVisibleTab() == tab;
}
bool TabStrip::IsFocusInTabs() const {
return GetFocusManager() && Contains(GetFocusManager()->GetFocusedView()) &&
GetFocusManager()->GetFocusedView() != new_tab_button_;
}
void TabStrip::MaybeStartDrag(
TabSlotView* source,
const ui::LocatedEvent& event,
const ui::ListSelectionModel& original_selection) {
// Don't accidentally start any drag operations during animations if the
// mouse is down... during an animation tabs are being resized automatically,
// so the View system can misinterpret this easily if the mouse is down that
// the user is dragging.
if (IsAnimating() || controller_->HasAvailableDragActions() == 0)
return;
// Check that the source is either a valid tab or a tab group header, which
// are the only valid drag targets.
if (!IsValidModelIndex(GetModelIndexOf(source))) {
DCHECK_EQ(source->GetTabSlotViewType(),
TabSlotView::ViewType::kTabGroupHeader);
}
drag_context_->MaybeStartDrag(source, event, original_selection);
}
void TabStrip::ContinueDrag(views::View* view, const ui::LocatedEvent& event) {
drag_context_->ContinueDrag(view, event);
}
bool TabStrip::EndDrag(EndDragReason reason) {
return drag_context_->EndDrag(reason);
}
Tab* TabStrip::GetTabAt(const gfx::Point& point) {
views::View* view = GetEventHandlerForPoint(point);
if (!view)
return nullptr; // No tab contains the point.
// Walk up the view hierarchy until we find a tab, or the TabStrip.
while (view && view != this && view->GetID() != VIEW_ID_TAB)
view = view->parent();
return view && view->GetID() == VIEW_ID_TAB ? static_cast<Tab*>(view)
: nullptr;
}
const Tab* TabStrip::GetAdjacentTab(const Tab* tab, int offset) {
int index = GetModelIndexOf(tab);
if (index < 0)
return nullptr;
index += offset;
return IsValidModelIndex(index) ? tab_at(index) : nullptr;
}
void TabStrip::OnMouseEventInTab(views::View* source,
const ui::MouseEvent& event) {
// Record time from cursor entering the tabstrip to first tap on a tab to
// switch.
if (mouse_entered_tabstrip_time_.has_value() &&
event.type() == ui::ET_MOUSE_PRESSED &&
!strcmp(source->GetClassName(), Tab::kViewClassName)) {
UMA_HISTOGRAM_MEDIUM_TIMES(
"TabStrip.TimeToSwitch",
base::TimeTicks::Now() - mouse_entered_tabstrip_time_.value());
mouse_entered_tabstrip_time_.reset();
}
UpdateStackedLayoutFromMouseEvent(source, event);
}
void TabStrip::UpdateHoverCard(Tab* tab) {
if (!base::FeatureList::IsEnabled(features::kTabHoverCards))
return;
// We don't want to show a hover card for a tab while it is animating.
if (tab &&
(bounds_animator_.IsAnimating(tab) || layout_helper_->IsAnimating())) {
return;
}
if (!hover_card_) {
// There is nothing to be done if the hover card doesn't exist and we are
// not trying to show it.
if (!tab)
return;
hover_card_ = new TabHoverCardBubbleView(tab);
hover_card_observer_.Add(hover_card_);
if (GetWidget()) {
hover_card_event_sniffer_ =
std::make_unique<TabHoverCardEventSniffer>(hover_card_, this);
}
}
if (tab)
hover_card_->UpdateAndShow(tab);
else
hover_card_->FadeOutToHide();
}
bool TabStrip::ShowDomainInHoverCard(const Tab* tab) const {
const auto* app_controller = controller_->GetBrowser()->app_controller();
return !app_controller || !app_controller->is_for_system_web_app();
}
bool TabStrip::HoverCardIsShowingForTab(Tab* tab) {
if (!base::FeatureList::IsEnabled(features::kTabHoverCards))
return false;
return hover_card_ && hover_card_->GetWidget()->IsVisible() &&
!hover_card_->IsFadingOut() &&
hover_card_->GetDesiredAnchorView() == tab;
}
int TabStrip::GetBackgroundOffset() const {
return background_offset_;
}
int TabStrip::GetStrokeThickness() const {
return ShouldDrawStrokes() ? 1 : 0;
}
bool TabStrip::CanPaintThrobberToLayer() const {
// Disable layer-painting of throbbers if dragging, if any tab animation is in
// progress, or if stacked tabs are enabled. Also disable in fullscreen: when
// "immersive" the tab strip could be sliding in or out; for other modes,
// there's no tab strip.
const bool dragging = drag_context_->IsDragStarted();
const views::Widget* widget = GetWidget();
return widget && !touch_layout_ && !dragging && !IsAnimating() &&
!widget->IsFullscreen();
}
bool TabStrip::HasVisibleBackgroundTabShapes() const {
return controller_->HasVisibleBackgroundTabShapes();
}
bool TabStrip::ShouldPaintAsActiveFrame() const {
return controller_->ShouldPaintAsActiveFrame();
}
SkColor TabStrip::GetToolbarTopSeparatorColor() const {
return controller_->GetToolbarTopSeparatorColor();
}
SkColor TabStrip::GetTabSeparatorColor() const {
return separator_color_;
}
SkColor TabStrip::GetTabBackgroundColor(
TabActive active,
BrowserFrameActiveState active_state) const {
const ui::ThemeProvider* tp = GetThemeProvider();
if (!tp)
return SK_ColorBLACK;
constexpr int kColorIds[2][2] = {
{ThemeProperties::COLOR_TAB_BACKGROUND_INACTIVE_FRAME_INACTIVE,
ThemeProperties::COLOR_TAB_BACKGROUND_INACTIVE_FRAME_ACTIVE},
{ThemeProperties::COLOR_TAB_BACKGROUND_ACTIVE_FRAME_INACTIVE,
ThemeProperties::COLOR_TAB_BACKGROUND_ACTIVE_FRAME_ACTIVE}};
using State = BrowserFrameActiveState;
const bool tab_active = active == TabActive::kActive;
const bool frame_active =
(active_state == State::kActive) ||
((active_state == State::kUseCurrent) && ShouldPaintAsActiveFrame());
return tp->GetColor(kColorIds[tab_active][frame_active]);
}
SkColor TabStrip::GetTabForegroundColor(TabActive active,
SkColor background_color) const {
const ui::ThemeProvider* tp = GetThemeProvider();
if (!tp)
return SK_ColorBLACK;
constexpr int kColorIds[2][2] = {
{ThemeProperties::COLOR_TAB_FOREGROUND_INACTIVE_FRAME_INACTIVE,
ThemeProperties::COLOR_TAB_FOREGROUND_INACTIVE_FRAME_ACTIVE},
{ThemeProperties::COLOR_TAB_FOREGROUND_ACTIVE_FRAME_INACTIVE,
ThemeProperties::COLOR_TAB_FOREGROUND_ACTIVE_FRAME_ACTIVE}};
const bool tab_active = active == TabActive::kActive;
const bool frame_active = ShouldPaintAsActiveFrame();
const int color_id = kColorIds[tab_active][frame_active];
SkColor color = tp->GetColor(color_id);
if (tp->HasCustomColor(color_id))
return color;
if ((color_id ==
ThemeProperties::COLOR_TAB_FOREGROUND_INACTIVE_FRAME_INACTIVE) &&
tp->HasCustomColor(
ThemeProperties::COLOR_TAB_FOREGROUND_INACTIVE_FRAME_ACTIVE)) {
// If a custom theme sets a background tab text color for active but not
// inactive windows, generate the inactive color by blending the active one
// at 75% as we do in the default theme.
color = tp->GetColor(
ThemeProperties::COLOR_TAB_FOREGROUND_INACTIVE_FRAME_ACTIVE);
}
if (!frame_active)
color = color_utils::AlphaBlend(color, background_color, 0.75f);
// To minimize any readability cost of custom system frame colors, try to make
// the text reach the same contrast ratio that it would in the default theme.
const SkColor target = color_utils::GetColorWithMaxContrast(background_color);
// These contrast ratios should match the actual ratios in the default theme
// colors when no system colors are involved, except for the inactive tab/
// inactive frame case, which has been raised from 4.48 to 4.5 to meet
// accessibility guidelines.
constexpr float kContrast[2][2] = {{4.5f, // Inactive tab, inactive frame
7.98f}, // Inactive tab, active frame
{5.0f, // Active tab, inactive frame
10.46f}}; // Active tab, active frame
const float contrast = kContrast[tab_active][frame_active];
return color_utils::BlendForMinContrast(color, background_color, target,
contrast)
.color;
}
// Returns the accessible tab name for the tab.
base::string16 TabStrip::GetAccessibleTabName(const Tab* tab) const {
const int model_index = GetModelIndexOf(tab);
return IsValidModelIndex(model_index) ? controller_->GetAccessibleTabName(tab)
: base::string16();
}
base::Optional<int> TabStrip::GetCustomBackgroundId(
BrowserFrameActiveState active_state) const {
if (!TitlebarBackgroundIsTransparent())
return controller_->GetCustomBackgroundId(active_state);
constexpr int kBackgroundIdGlass = IDR_THEME_TAB_BACKGROUND_V;
return GetThemeProvider()->HasCustomImage(kBackgroundIdGlass)
? base::make_optional(kBackgroundIdGlass)
: base::nullopt;
}
gfx::Rect TabStrip::GetTabAnimationTargetBounds(const Tab* tab) {
return bounds_animator_.GetTargetBounds(tab);
}
void TabStrip::MouseMovedOutOfHost() {
ResizeLayoutTabs();
if (reset_to_shrink_on_exit_) {
reset_to_shrink_on_exit_ = false;
SetStackedLayout(false);
controller_->StackedLayoutMaybeChanged();
}
}
float TabStrip::GetHoverOpacityForTab(float range_parameter) const {
return gfx::Tween::FloatValueBetween(range_parameter, hover_opacity_min_,
hover_opacity_max_);
}
float TabStrip::GetHoverOpacityForRadialHighlight() const {
return radial_highlight_opacity_;
}
base::string16 TabStrip::GetGroupTitle(
const tab_groups::TabGroupId& group) const {
return controller_->GetGroupTitle(group);
}
tab_groups::TabGroupColorId TabStrip::GetGroupColorId(
const tab_groups::TabGroupId& group) const {
return controller_->GetGroupColorId(group);
}
SkColor TabStrip::GetPaintedGroupColor(
const tab_groups::TabGroupColorId& color_id) const {
return GetThemeProvider()->GetColor(
GetTabGroupTabStripColorId(color_id, ShouldPaintAsActiveFrame()));
}
///////////////////////////////////////////////////////////////////////////////
// TabStrip, views::AccessiblePaneView overrides:
void TabStrip::Layout() {
// Only do a layout if our size changed.
if (last_layout_size_ == size())
return;
if (drag_context_->IsDragSessionActive())
return;
CompleteAnimationAndLayout();
}
void TabStrip::PaintChildren(const views::PaintInfo& paint_info) {
// This is used to log to UMA. NO EARLY RETURNS!
base::ElapsedTimer paint_timer;
// The view order doesn't match the paint order (layout_helper_ contains the
// view ordering).
bool is_dragging = false;
Tab* active_tab = nullptr;
std::vector<Tab*> tabs_dragging;
std::vector<Tab*> selected_and_hovered_tabs;
// When background tab shapes are visible, as for hovered or selected tabs,
// the paint order must be handled carefully to avoid Z-order errors, so
// this code defers drawing such tabs until later.
const auto paint_or_add_to_tabs = [&paint_info,
&selected_and_hovered_tabs](Tab* tab) {
if (tab->tab_style()->GetZValue() > 0.0) {
selected_and_hovered_tabs.push_back(tab);
} else {
tab->Paint(paint_info);
}
};
std::vector<Tab*> all_tabs = layout_helper_->GetTabs();
int active_tab_index = -1;
for (int i = all_tabs.size() - 1; i >= 0; --i) {
Tab* tab = all_tabs[i];
if (tab->dragging() && !stacked_layout_) {
is_dragging = true;
if (tab->IsActive()) {
active_tab = tab;
active_tab_index = i;
} else {
tabs_dragging.push_back(tab);
}
} else if (tab->IsActive()) {
active_tab = tab;
active_tab_index = i;
} else if (!stacked_layout_) {
paint_or_add_to_tabs(tab);
}
}
// Draw from the left and then the right if we're in touch mode.
if (stacked_layout_ && active_tab_index >= 0) {
for (int i = 0; i < active_tab_index; ++i) {
Tab* tab = all_tabs[i];
tab->Paint(paint_info);
}
for (int i = all_tabs.size() - 1; i > active_tab_index; --i) {
Tab* tab = all_tabs[i];
tab->Paint(paint_info);
}
}
std::stable_sort(selected_and_hovered_tabs.begin(),
selected_and_hovered_tabs.end(), [](Tab* tab1, Tab* tab2) {
return tab1->tab_style()->GetZValue() <
tab2->tab_style()->GetZValue();
});
for (Tab* tab : selected_and_hovered_tabs)
tab->Paint(paint_info);
// Keep track of the dragging group if dragging by the group header, or
// the current group if just dragging tabs into a group. At most one of these
// will have a value, since a drag is either a group drag or a tab drag.
base::Optional<tab_groups::TabGroupId> dragging_group = base::nullopt;
base::Optional<tab_groups::TabGroupId> current_group = base::nullopt;
// Paint group headers and underlines.
for (const auto& group_view_pair : group_views_) {
if (group_view_pair.second->header()->dragging()) {
// If the whole group is dragging, defer painting both the header and the
// underline, since they should appear above non-dragging tabs and groups.
// Instead, just track the dragging group.
dragging_group = group_view_pair.first;
} else {
group_view_pair.second->header()->Paint(paint_info);
if (tabs_dragging.size() > 0 &&
tabs_dragging[0]->group() == group_view_pair.first) {
// If tabs are being dragged into a group, defer painting just the
// underline, which should appear above non-active dragging tabs as well
// as all non-dragging tabs and groups. Instead, just track the group
// that the tabs are being dragged into.
current_group = group_view_pair.first;
} else {
group_view_pair.second->underline()->Paint(paint_info);
}
}
}
// Always paint the active tab over all the inactive tabs.
if (active_tab && !is_dragging)
active_tab->Paint(paint_info);
// Paint the New Tab button, unless it's being painted onto its own Layer.
if (!new_tab_button_->layer())
new_tab_button_->Paint(paint_info);
// If dragging a group, paint the group highlight and header above all
// non-dragging tabs and groups.
if (dragging_group.has_value()) {
group_views_[dragging_group.value()]->highlight()->Paint(paint_info);
group_views_[dragging_group.value()]->header()->Paint(paint_info);
}
// Paint the dragged tabs.
for (size_t i = 0; i < tabs_dragging.size(); ++i)
tabs_dragging[i]->Paint(paint_info);
// If dragging a group, or dragging tabs into a group, paint the group
// underline above the dragging tabs. Otherwise, any non-active dragging tabs
// will not get an underline.
if (dragging_group.has_value())
group_views_[dragging_group.value()]->underline()->Paint(paint_info);
if (current_group.has_value())
group_views_[current_group.value()]->underline()->Paint(paint_info);
// If the active tab is being dragged, it goes last.
if (active_tab && is_dragging)
active_tab->Paint(paint_info);
UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES(
"TabStrip.PaintChildrenDuration", paint_timer.Elapsed(),
base::TimeDelta::FromMicroseconds(1),
base::TimeDelta::FromMicroseconds(10000), 50);
}
const char* TabStrip::GetClassName() const {
static const char kViewClassName[] = "TabStrip";
return kViewClassName;
}
gfx::Size TabStrip::CalculatePreferredSize() const {
int needed_tab_width;
if (touch_layout_ || adjust_layout_) {
// For stacked tabs the minimum size is calculated as the size needed to
// handle showing any number of tabs.
needed_tab_width =
GetStackableTabWidth() + (2 * kStackedPadding * kMaxStackedCount);
} else {
// Otherwise the minimum width is based on the actual number of tabs.
const int pinned_tab_count = GetPinnedTabCount();
needed_tab_width = pinned_tab_count * TabStyle::GetPinnedWidth();
const int remaining_tab_count = tab_count() - pinned_tab_count;
const int min_selected_width = TabStyleViews::GetMinimumActiveWidth();
const int min_unselected_width = TabStyleViews::GetMinimumInactiveWidth();
if (remaining_tab_count > 0) {
needed_tab_width += min_selected_width +
((remaining_tab_count - 1) * min_unselected_width);
}
const int overlap = TabStyle::GetTabOverlap();
if (tab_count() > 1)
needed_tab_width -= (tab_count() - 1) * overlap;
// Don't let the tabstrip shrink smaller than is necessary to show one tab,
// and don't force it to be larger than is necessary to show 20 tabs.
const int largest_min_tab_width =
min_selected_width + 19 * (min_unselected_width - overlap);
needed_tab_width = std::min(std::max(needed_tab_width, min_selected_width),
largest_min_tab_width);
}
return gfx::Size(needed_tab_width + TabToNewTabButtonSpacing() +
new_tab_button_ideal_bounds_.width() + FrameGrabWidth(),
GetLayoutConstant(TAB_HEIGHT));
}
void TabStrip::GetAccessibleNodeData(ui::AXNodeData* node_data) {
node_data->role = ax::mojom::Role::kTabList;
}
views::View* TabStrip::GetTooltipHandlerForPoint(const gfx::Point& point) {
if (!HitTestPoint(point))
return nullptr;
if (!touch_layout_) {
// Return any view that isn't a Tab or this TabStrip immediately. We don't
// want to interfere.
views::View* v = View::GetTooltipHandlerForPoint(point);
if (v && v != this && strcmp(v->GetClassName(), Tab::kViewClassName))
return v;
views::View* tab = FindTabHitByPoint(point);
if (tab)
return tab;
} else {
if (new_tab_button_->GetVisible()) {
views::View* view =
ConvertPointToViewAndGetTooltipHandler(this, new_tab_button_, point);
if (view)
return view;
}
Tab* tab = FindTabForEvent(point);
if (tab)
return ConvertPointToViewAndGetTooltipHandler(this, tab, point);
}
return this;
}
void TabStrip::OnThemeChanged() {
views::AccessiblePaneView::OnThemeChanged();
FrameColorsChanged();
}
views::View* TabStrip::GetDefaultFocusableChild() {
int active = controller_->GetActiveIndex();
return active != TabStripModel::kNoTab
? tab_at(active)
: AccessiblePaneView::GetDefaultFocusableChild();
}
BrowserRootView::DropIndex TabStrip::GetDropIndex(
const ui::DropTargetEvent& event) {
// Force animations to stop, otherwise it makes the index calculation tricky.
StopAnimating(true);
// If the UI layout is right-to-left, we need to mirror the mouse
// coordinates since we calculate the drop index based on the
// original (and therefore non-mirrored) positions of the tabs.
const int x = GetMirroredXInView(event.x());
for (int i = 0; i < tab_count(); ++i) {
Tab* tab = tab_at(i);
const int tab_max_x = tab->x() + tab->width();
// When hovering over the left or right quarter of a tab, the drop indicator
// will point between tabs.
const int hot_width = tab->width() / 4;
if (x < tab_max_x) {
if (x >= (tab_max_x - hot_width))
return {i + 1, true};
return {i, x < tab->x() + hot_width};
}
}
// The drop isn't over a tab, add it to the end.
return {tab_count(), true};
}
views::View* TabStrip::GetViewForDrop() {
return this;
}
void TabStrip::HandleDragUpdate(
const base::Optional<BrowserRootView::DropIndex>& index) {
SetDropArrow(index);
}
void TabStrip::HandleDragExited() {
SetDropArrow({});
}
///////////////////////////////////////////////////////////////////////////////
// TabStrip, private:
void TabStrip::Init() {
SetID(VIEW_ID_TAB_STRIP);
// So we get enter/exit on children to switch stacked layout on and off.
set_notify_enter_exit_on_child(true);
new_tab_button_ = new NewTabButton(this, this);
new_tab_button_->SetTooltipText(
l10n_util::GetStringUTF16(IDS_TOOLTIP_NEW_TAB));
new_tab_button_->SetAccessibleName(
l10n_util::GetStringUTF16(IDS_ACCNAME_NEWTAB));
new_tab_button_->SetImageVerticalAlignment(views::ImageButton::ALIGN_BOTTOM);
new_tab_button_->SetEventTargeter(
std::make_unique<views::ViewTargeter>(new_tab_button_));
AddChildView(new_tab_button_);
new_tab_button_->AddObserver(this);
UpdateNewTabButtonBorder();
new_tab_button_ideal_bounds_.set_size(new_tab_button_->GetPreferredSize());
if (g_drop_indicator_width == 0) {
// Direction doesn't matter, both images are the same size.
gfx::ImageSkia* drop_image = GetDropArrowImage(true);
g_drop_indicator_width = drop_image->width();
g_drop_indicator_height = drop_image->height();
}
UpdateContrastRatioValues();
if (!gfx::Animation::ShouldRenderRichAnimation())
bounds_animator_.SetAnimationDuration(base::TimeDelta());
}
std::map<tab_groups::TabGroupId, TabGroupHeader*> TabStrip::GetGroupHeaders() {
std::map<tab_groups::TabGroupId, TabGroupHeader*> group_headers;
for (const auto& group_view_pair : group_views_) {
group_headers.insert(std::make_pair(group_view_pair.first,
group_view_pair.second->header()));
}
return group_headers;
}
void TabStrip::StartInsertTabAnimation(int model_index, TabPinned pinned) {
if (!bounds_animator_.IsAnimating() && !in_tab_close_) {
layout_helper_->InsertTabAt(
model_index, tab_at(model_index),
base::BindOnce(&TabStrip::OnTabCloseAnimationCompleted,
base::Unretained(this),
base::Unretained(tab_at(model_index))),
pinned);
} else {
// TODO(958173): Delete this branch once |TabStripLayoutHelper::animator_|
// has taken over all animation responsibilities.
layout_helper_->InsertTabAtNoAnimation(
model_index, tab_at(model_index),
base::BindOnce(&TabStrip::OnTabCloseAnimationCompleted,
base::Unretained(this),
base::Unretained(tab_at(model_index))),
pinned);
PrepareForAnimation();
ExitTabClosingMode();
UpdateIdealBounds();
// Insert the tab just after the current right edge of the previous tab, if
// any.
gfx::Rect bounds = ideal_bounds(model_index);
const int tab_overlap = TabStyle::GetTabOverlap();
if (model_index > 0)
bounds.set_x(tab_at(model_index - 1)->bounds().right() - tab_overlap);
// Start at the width of the overlap in order to animate at the same speed
// the surrounding tabs are moving, since at this width the subsequent tab
// is naturally positioned at the same X coordinate.
bounds.set_width(tab_overlap);
// Animate in to the full width.
tab_at(model_index)->SetBoundsRect(bounds);
AnimateToIdealBounds();
}
}
void TabStrip::StartRemoveTabAnimation(int model_index, bool was_active) {
if (bounds_animator_.IsAnimating() || touch_layout_ ||
!base::FeatureList::IsEnabled(features::kNewTabstripAnimation)) {
StartFallbackRemoveTabAnimation(model_index, was_active);
return;
}
// The tab formerly at |model_index| has already been removed from the model,
// so |model_count| won't include it.
const int model_count = GetModelCount();
// If |in_tab_close_| is true then we want to animate the remaining tabs
// (if there are any) differently in order to ensure that a useful tab will
// end up under the cursor.
if (in_tab_close_ && model_count > 0) {
const int available_width =
override_available_width_for_tabs_.value_or(GetTabAreaWidth());
layout_helper_->EnterTabClosingMode(available_width);
} else {
layout_helper_->ExitTabClosingMode();
}
Tab* tab = tab_at(model_index);
tab->SetClosing(true);
const int old_x = ideal_bounds(model_index).x();
RemoveTabFromViewModel(model_index);
if (touch_layout_) {
touch_layout_->RemoveTab(model_index,
UpdateIdealBoundsForPinnedTabs(nullptr), old_x);
}
layout_helper_->RemoveTab(model_index, tab);
}
void TabStrip::StartFallbackRemoveTabAnimation(int model_index,
bool was_active) {
// TODO(958173): Delete this once all animations have been migrated to the
// new style.
const int model_count = GetModelCount();
const int tab_overlap = TabStyle::GetTabOverlap();
if (in_tab_close_ && model_count > 0 && model_index != model_count) {
// The user closed a tab other than the last tab. Set
// override_available_width_for_tabs_ so that as the user closes tabs with
// the mouse a tab continues to fall under the mouse.
int next_active_index = controller_->GetActiveIndex();
DCHECK(IsValidModelIndex(next_active_index));
if (model_index <= next_active_index) {
// At this point, model's internal state has already been updated.
// |contents| has been detached from model and the active index has been
// updated. But the tab for |contents| isn't removed yet. Thus, we need to
// fix up next_active_index based on it.
next_active_index++;
}
Tab* next_active_tab = tab_at(next_active_index);
Tab* tab_being_removed = tab_at(model_index);
UpdateIdealBounds();
int size_delta = tab_being_removed->width();
if (!tab_being_removed->data().pinned && was_active &&
GetActiveTabWidth() > GetInactiveTabWidth()) {
// When removing an active, non-pinned tab, an inactive tab will be made
// active and thus given the active width. Thus the width being removed
// from the strip is really the current width of whichever inactive tab
// will be made active.
size_delta = next_active_tab->width();
}
override_available_width_for_tabs_ =
ideal_bounds(model_count).right() - size_delta + tab_overlap;
}
if (!touch_layout_)
PrepareForAnimation();
Tab* tab = tab_at(model_index);
tab->SetClosing(true);
int old_x = tabs_.ideal_bounds(model_index).x();
RemoveTabFromViewModel(model_index);
if (touch_layout_) {
touch_layout_->RemoveTab(model_index,
UpdateIdealBoundsForPinnedTabs(nullptr), old_x);
}
// Destroy any tabs that |layout_helper_| is animating closed.
if (layout_helper_->IsAnimating())
layout_helper_->CompleteAnimations();
layout_helper_->RemoveTabNoAnimation(model_index, tab);
UpdateIdealBounds();
// Don't destroy the tab that we just started animating closed.
AnimateToIdealBounds(ClosingTabsBehavior::kTransferOwnership);
// TODO(pkasting): When closing multiple tabs, we get repeated RemoveTabAt()
// calls, each of which closes a new tab and thus generates different ideal
// bounds. We should update the animations of any other tabs that are
// currently being closed to reflect the new ideal bounds, or else change from
// removing one tab at a time to animating the removal of all tabs at once.
// Compute the target bounds for animating this tab closed. The tab's left
// edge should stay joined to the right edge of the previous tab, if any.
gfx::Rect tab_bounds = tab->bounds();
tab_bounds.set_x((model_index > 0)
? (ideal_bounds(model_index - 1).right() - tab_overlap)
: 0);
// The tab should animate to the width of the overlap in order to close at the
// same speed the surrounding tabs are moving, since at this width the
// subsequent tab is naturally positioned at the same X coordinate.
tab_bounds.set_width(tab_overlap);
// Animate the tab closed.
bounds_animator_.AnimateViewTo(
tab, tab_bounds, std::make_unique<RemoveTabDelegate>(this, tab));
// TODO(pkasting): The first part of this conditional doesn't really make
// sense to me. Why is each condition justified?
if ((touch_layout_ || !in_tab_close_ || model_index == GetModelCount()) &&
TabDragController::IsAttachedTo(GetDragContext())) {
// Don't animate the new tab button when dragging tabs. Otherwise it looks
// like the new tab button magically appears from beyond the end of the tab
// strip.
bounds_animator_.StopAnimatingView(new_tab_button_);
new_tab_button_->SetBoundsRect(new_tab_button_ideal_bounds_);
}
}
void TabStrip::StartMoveTabAnimation() {
PrepareForAnimation();
UpdateIdealBounds();
AnimateToIdealBounds();
}
void TabStrip::AnimateToIdealBounds(ClosingTabsBehavior closing_tabs_behavior) {
UpdateHoverCard(nullptr);
// |bounds_animator_| and |layout_helper_| should not run
// concurrently. |bounds_animator_| takes precedence, and can finish what the
// other started.
if (layout_helper_->IsAnimating()) {
// Complete animations so |layout_helper_| will be in sync with
// ideal bounds instead of the current bounds.
switch (closing_tabs_behavior) {
case ClosingTabsBehavior::kTransferOwnership:
layout_helper_->CompleteAnimationsWithoutDestroyingTabs();
break;
case ClosingTabsBehavior::kDestroy:
layout_helper_->CompleteAnimations();
break;
}
// Take over tab closing mode now so that |bounds_animator| can use
// |layout_helper_| to calculate ideal bounds without interference.
override_available_width_for_tabs_ = layout_helper_->ExitTabClosingMode();
}
for (int i = 0; i < tab_count(); ++i) {
// If the tab is being dragged manually, skip it.
Tab* tab = tab_at(i);
if (tab->dragging() && !bounds_animator_.IsAnimating(tab))
continue;
// Also skip tabs already being animated to the same ideal bounds. Calling
// AnimateViewTo() again restarts the animation, which changes the timing of
// how the tab animates, leading to hitches.
const gfx::Rect& target_bounds = ideal_bounds(i);
if (bounds_animator_.GetTargetBounds(tab) == target_bounds)
continue;
// Set an animation delegate for the tab so it will clip appropriately.
// Don't do this if dragging() is true. In this case the tab was
// previously being dragged and is now animating back to its ideal
// bounds; it already has an associated ResetDraggingStateDelegate that
// will reset this dragging state. Replacing this delegate would mean
// this code would also need to reset the dragging state immediately,
// and that could allow the new tab button to be drawn atop this tab.
bounds_animator_.AnimateViewTo(
tab, target_bounds,
tab->dragging() ? nullptr
: std::make_unique<TabAnimationDelegate>(this, tab));
}
for (const auto& header_pair : group_views_) {
bounds_animator_.AnimateViewTo(
header_pair.second->header(),
layout_helper_->group_header_ideal_bounds().at(header_pair.first));
}
if (bounds_animator_.GetTargetBounds(new_tab_button_) !=
new_tab_button_ideal_bounds_) {
bounds_animator_.AnimateViewTo(new_tab_button_,
new_tab_button_ideal_bounds_);
}
}
void TabStrip::ExitTabClosingMode() {
in_tab_close_ = false;
override_available_width_for_tabs_.reset();
layout_helper_->ExitTabClosingMode();
}
bool TabStrip::ShouldHighlightCloseButtonAfterRemove() {
return in_tab_close_;
}
int TabStrip::TabToNewTabButtonSpacing() const {
// The new tab button contains built-in padding, and should be placed flush
// against the trailing separator.
return -TabStyle::GetTabInternalPadding().right();
}
int TabStrip::FrameGrabWidth() const {
// The grab area is adjacent to the new tab button. Treat the padding in the
// new tab button as part of the grab area.
constexpr int kApparentWidth = 50;
return kApparentWidth - new_tab_button_->GetInsets().right();
}
bool TabStrip::TitlebarBackgroundIsTransparent() const {
#if defined(OS_WIN)
// Windows 8+ uses transparent window contents (because the titlebar area is
// drawn by the system and not Chrome), but the actual titlebar is opaque.
if (base::win::GetVersion() >= base::win::Version::WIN8)
return false;
#endif
return GetWidget()->ShouldWindowContentsBeTransparent();
}
void TabStrip::CompleteAnimationAndLayout() {
ExitTabClosingMode();
// If |bounds_animator_| is running, it owns destroying tabs when close
// animations complete. Otherwise, |layout_helper_| does.
if (bounds_animator_.IsAnimating()) {
layout_helper_->CompleteAnimationsWithoutDestroyingTabs();
} else {
layout_helper_->CompleteAnimations();
}
LayoutToCurrentBounds();
UpdateIdealBounds();
}
void TabStrip::LayoutToCurrentBounds() {
last_layout_size_ = size();
bounds_animator_.Cancel();
SwapLayoutIfNecessary();
if (touch_layout_) {
touch_layout_->SetWidth(GetTabAreaWidth());
UpdateIdealBounds();
views::ViewModelUtils::SetViewBoundsToIdealBounds(tabs_);
bounds_animator_.StopAnimatingView(new_tab_button_);
new_tab_button_->SetBoundsRect(new_tab_button_ideal_bounds_);
} else {
const int available_width =
override_available_width_for_tabs_.value_or(GetTabAreaWidth());
int trailing_x = layout_helper_->LayoutTabs(available_width);
gfx::Rect new_tab_button_current_bounds = new_tab_button_ideal_bounds_;
new_tab_button_current_bounds.set_origin(gfx::Point(
std::min(available_width, trailing_x) + TabToNewTabButtonSpacing(), 0));
new_tab_button_->SetBoundsRect(new_tab_button_current_bounds);
}
SetTabVisibility();
SchedulePaint();
}
void TabStrip::SetTabVisibility() {
// We could probably be more efficient here by making use of the fact that the
// tabstrip will always have any visible tabs, and then any invisible tabs, so
// we could e.g. binary-search for the changeover point. But since we have to
// iterate through all the tabs to call SetVisible() anyway, it doesn't seem
// worth it.
for (Tab* tab : layout_helper_->GetTabs())
tab->SetVisible(ShouldTabBeVisible(tab));
}
void TabStrip::UpdateAccessibleTabIndices() {
const int num_tabs = tab_count();
for (int i = 0; i < num_tabs; ++i)
tab_at(i)->GetViewAccessibility().OverridePosInSet(i + 1, num_tabs);
}
int TabStrip::GetActiveTabWidth() const {
return layout_helper_->active_tab_width();
}
int TabStrip::GetInactiveTabWidth() const {
return layout_helper_->inactive_tab_width();
}
int TabStrip::GetTabAreaWidth() const {
return drag_context_->GetTabDragAreaWidth() -
new_tab_button_ideal_bounds_.width() - TabToNewTabButtonSpacing();
}
int TabStrip::GetNewTabButtonIdealX() const {
const int trailing_x = tabs_.ideal_bounds(tab_count() - 1).right();
// For non-stacked tabs the ideal bounds may go outside the bounds of the
// tabstrip. Constrain the x-coordinate of the new tab button so that it is
// always visible.
return std::min(GetTabAreaWidth(), trailing_x) + TabToNewTabButtonSpacing();
}
const Tab* TabStrip::GetLastVisibleTab() const {
for (int i = tab_count() - 1; i >= 0; --i) {
const Tab* tab = tab_at(i);
if (tab->GetVisible())
return tab;
}
// While in normal use the tabstrip should always be wide enough to have at
// least one visible tab, it can be zero-width in tests, meaning we get here.
return nullptr;
}
int TabStrip::GetViewInsertionIndex(Tab* tab,
base::Optional<int> from_model_index,
int to_model_index) const {
// -1 is treated a sentinel value to indicate a tab is newly added to the
// beginning of the tab strip.
if (to_model_index < 0)
return 0;
// If to_model_index is beyond the end of the tab strip, then the tab is newly
// added to the end of the tab strip. In that case we can just return one
// beyond the view index of the last existing tab.
if (to_model_index >= tab_count())
return (tab_count() ? GetIndexOf(tab_at(tab_count() - 1)) + 1 : 0);
// If there is no from_model_index, then the tab is newly added in the middle
// of the tab strip. In that case we treat it as coming from the end of the
// tab strip, since new views are ordered at the end by default.
if (!from_model_index.has_value())
from_model_index = tab_count();
DCHECK_NE(to_model_index, from_model_index.value());
// Since we don't have an absolute mapping from model index to view index, we
// anchor on the last known view index at the given to_model_index.
Tab* other_tab = tab_at(to_model_index);
int other_view_index = GetIndexOf(other_tab);
if (other_view_index <= 0)
return 0;
// When moving to the right, just use the anchor index because the tab will
// replace that position in both the model and the view. This happens because
// the tab itself occupies a lower index that the other tabs will shift into.
if (to_model_index > from_model_index.value())
return other_view_index;
// When moving to the left, the tab may end up on either the left or right
// side of a group header, depending on if it's in that group. This affects
// its view index but not its model index, so we adjust the former only.
if (other_tab->group().has_value() && other_tab->group() != tab->group())
return other_view_index - 1;
return other_view_index;
}
void TabStrip::RemoveTabFromViewModel(int index) {
Tab* closing_tab = tab_at(index);
bool closing_tab_was_active = closing_tab->IsActive();
UpdateHoverCard(nullptr);
// We still need to keep the tab alive until the remove tab animation
// completes. Defer destroying it until then.
tabs_.Remove(index);
selected_tabs_.DecrementFrom(index);
if (closing_tab_was_active)
closing_tab->ActiveStateChanged();
}
void TabStrip::OnTabCloseAnimationCompleted(Tab* tab) {
DCHECK(tab->closing());
std::unique_ptr<Tab> deleter(tab);
layout_helper_->OnTabDestroyed(tab);
// Send the Container a message to simulate a mouse moved event at the current
// mouse position. This tickles the Tab the mouse is currently over to show
// the "hot" state of the close button. Note that this is not required (and
// indeed may crash!) for removes spawned by non-mouse closes and
// drag-detaches.
if (!GetDragContext()->IsDragSessionActive() &&
ShouldHighlightCloseButtonAfterRemove()) {
// The widget can apparently be null during shutdown.
views::Widget* widget = GetWidget();
if (widget)
widget->SynthesizeMouseMoveEvent();
}
}
void TabStrip::OnGroupCloseAnimationCompleted(
const tab_groups::TabGroupId& group) {
group_views_.erase(group);
// TODO(crbug.com/905491): We might want to simulate a mouse move here, like
// we do in OnTabCloseAnimationCompleted.
}
void TabStrip::StoppedDraggingView(TabSlotView* view, bool* is_first_view) {
if (view &&
view->GetTabSlotViewType() == TabSlotView::ViewType::kTabGroupHeader) {
// Ensure all tab group UI is repainted, especially the dragging highlight.
view->set_dragging(false);
SchedulePaint();
return;
}
int tab_data_index = GetModelIndexOf(view);
if (tab_data_index == -1) {
// The tab was removed before the drag completed. Don't do anything.
return;
}
if (*is_first_view) {
*is_first_view = false;
PrepareForAnimation();
// Animate the view back to its correct position.
UpdateIdealBounds();
AnimateToIdealBounds();
}
// Install a delegate to reset the dragging state when done. We have to leave
// dragging true for the tab otherwise it'll draw beneath the new tab button.
bounds_animator_.AnimateViewTo(view, ideal_bounds(tab_data_index),
std::make_unique<ResetDraggingStateDelegate>(
this, static_cast<Tab*>(view)));
}
void TabStrip::UpdateStackedLayoutFromMouseEvent(views::View* source,
const ui::MouseEvent& event) {
if (!adjust_layout_)
return;
// The following code attempts to switch to shrink (not stacked) layout when
// the mouse exits the tabstrip (or the mouse is pressed on a stacked tab) and
// to stacked layout when a touch device is used. This is made problematic by
// windows generating mouse move events that do not clearly indicate the move
// is the result of a touch device. This assumes a real mouse is used if
// |kMouseMoveCountBeforeConsiderReal| mouse move events are received within
// the time window |kMouseMoveTime|. At the time we get a mouse press we know
// whether its from a touch device or not, but we don't layout then else
// everything shifts. Instead we wait for the release.
//
// TODO(sky): revisit this when touch events are really plumbed through.
#if !defined(OS_CHROMEOS)
constexpr auto kMouseMoveTime = base::TimeDelta::FromMilliseconds(200);
constexpr int kMouseMoveCountBeforeConsiderReal = 3;
#endif
switch (event.type()) {
case ui::ET_MOUSE_PRESSED:
mouse_move_count_ = 0;
last_mouse_move_time_ = base::TimeTicks();
SetResetToShrinkOnExit((event.flags() & ui::EF_FROM_TOUCH) == 0);
if (reset_to_shrink_on_exit_ && touch_layout_) {
gfx::Point tab_strip_point(event.location());
views::View::ConvertPointToTarget(source, this, &tab_strip_point);
Tab* tab = FindTabForEvent(tab_strip_point);
if (tab && touch_layout_->IsStacked(GetModelIndexOf(tab))) {
SetStackedLayout(false);
controller_->StackedLayoutMaybeChanged();
}
}
break;
case ui::ET_MOUSE_MOVED: {
#if defined(OS_CHROMEOS)
// Ash does not synthesize mouse events from touch events.
SetResetToShrinkOnExit(true);
#else
gfx::Point location(event.location());
ConvertPointToTarget(source, this, &location);
if (location == last_mouse_move_location_)
return; // Ignore spurious moves.
last_mouse_move_location_ = location;
if ((event.flags() & ui::EF_FROM_TOUCH) ||
(event.flags() & ui::EF_IS_SYNTHESIZED)) {
last_mouse_move_time_ = base::TimeTicks();
} else if ((base::TimeTicks::Now() - last_mouse_move_time_) >=
kMouseMoveTime) {
mouse_move_count_ = 1;
last_mouse_move_time_ = base::TimeTicks::Now();
} else if (mouse_move_count_ < kMouseMoveCountBeforeConsiderReal) {
++mouse_move_count_;
} else {
SetResetToShrinkOnExit(true);
}
#endif
break;
}
case ui::ET_MOUSE_RELEASED: {
gfx::Point location(event.location());
ConvertPointToTarget(source, this, &location);
last_mouse_move_location_ = location;
mouse_move_count_ = 0;
last_mouse_move_time_ = base::TimeTicks();
if ((event.flags() & ui::EF_FROM_TOUCH) == ui::EF_FROM_TOUCH) {
SetStackedLayout(true);
controller_->StackedLayoutMaybeChanged();
}
break;
}
default:
break;
}
}
void TabStrip::UpdateContrastRatioValues() {
// There may be no controller in unit tests, and the call to
// GetTabBackgroundColor() below requires one, so bail early if it is absent.
if (!controller_)
return;
const SkColor inactive_bg = GetTabBackgroundColor(
TabActive::kInactive, BrowserFrameActiveState::kUseCurrent);
const auto get_blend = [inactive_bg](SkColor target, float contrast) {
return color_utils::BlendForMinContrast(inactive_bg, inactive_bg, target,
contrast);
};
const SkColor active_bg = GetTabBackgroundColor(
TabActive::kActive, BrowserFrameActiveState::kUseCurrent);
const auto get_hover_opacity = [active_bg, &get_blend](float contrast) {
return get_blend(active_bg, contrast).alpha / 255.0f;
};
// The contrast ratio for the hover effect on standard-width tabs.
// In the default color scheme, this corresponds to a hover opacity of 0.4.
constexpr float kStandardWidthContrast = 1.11f;
hover_opacity_min_ = get_hover_opacity(kStandardWidthContrast);
// The contrast ratio for the hover effect on min-width tabs.
// In the default color scheme, this corresponds to a hover opacity of 0.65.
constexpr float kMinWidthContrast = 1.19f;
hover_opacity_max_ = get_hover_opacity(kMinWidthContrast);
// The contrast ratio for the radial gradient effect on hovered tabs.
// In the default color scheme, this corresponds to a hover opacity of 0.45.
constexpr float kRadialGradientContrast = 1.13728f;
radial_highlight_opacity_ = get_hover_opacity(kRadialGradientContrast);
const SkColor inactive_fg =
GetTabForegroundColor(TabActive::kInactive, inactive_bg);
// The contrast ratio for the separator between inactive tabs.
constexpr float kTabSeparatorContrast = 2.5f;
separator_color_ = get_blend(inactive_fg, kTabSeparatorContrast).color;
}
void TabStrip::ShiftTabRelative(Tab* tab, int offset) {
DCHECK(offset == ShiftOffset::kLeft || offset == ShiftOffset::kRight);
const int start_index = GetModelIndexOf(tab);
const int target_index = start_index + offset;
if (!IsValidModelIndex(start_index))
return;
if (tab->closing())
return;
if (!IsValidModelIndex(target_index) ||
controller_->IsTabPinned(start_index) !=
controller_->IsTabPinned(target_index)) {
// Even if we've reached the boundary of where the tab could go, it may
// still be able to "move" out of its current group.
if (tab->group().has_value())
controller_->RemoveTabFromGroup(start_index);
return;
}
// If the tab is at a group boundary, instead of actually moving the tab just
// change its group membership.
base::Optional<tab_groups::TabGroupId> target_group =
tab_at(target_index)->group();
if (tab->group() != target_group) {
if (tab->group().has_value())
controller_->RemoveTabFromGroup(start_index);
else if (target_group.has_value())
controller_->AddTabToGroup(start_index, target_group.value());
return;
}
controller_->MoveTab(start_index, target_index);
}
void TabStrip::ShiftGroupRelative(const tab_groups::TabGroupId& group,
int offset) {
DCHECK(offset == ShiftOffset::kLeft || offset == ShiftOffset::kRight);
std::vector<int> tabs_in_group = controller_->ListTabsInGroup(group);
const int start_index = tabs_in_group.front();
int target_index = start_index + offset;
if (offset > 0)
target_index += tabs_in_group.size() - 1;
if (!IsValidModelIndex(start_index) || !IsValidModelIndex(target_index))
return;
// Avoid moving into the middle of another group by accounting for its size.
base::Optional<tab_groups::TabGroupId> target_group =
tab_at(target_index)->group();
if (target_group.has_value()) {
target_index +=
offset *
(controller_->ListTabsInGroup(target_group.value()).size() - 1);
}
if (!IsValidModelIndex(target_index))
return;
if (controller_->IsTabPinned(start_index) !=
controller_->IsTabPinned(target_index))
return;
controller_->MoveGroup(group, target_index);
}
void TabStrip::ResizeLayoutTabs() {
// We've been called back after the TabStrip has been emptied out (probably
// just prior to the window being destroyed). We need to do nothing here or
// else GetTabAt below will crash.
if (tab_count() == 0)
return;
// It is critically important that this is unhooked here, otherwise we will
// keep spying on messages forever.
RemoveMessageLoopObserver();
ExitTabClosingMode();
int pinned_tab_count = GetPinnedTabCount();
if (pinned_tab_count == tab_count()) {
// Only pinned tabs, we know the tab widths won't have changed (all
// pinned tabs have the same width), so there is nothing to do.
return;
}
// Don't try and avoid layout based on tab sizes. If tabs are small enough
// then the width of the active tab may not change, but other widths may
// have. This is particularly important if we've overflowed (all tabs are at
// the min).
StartResizeLayoutAnimation();
}
void TabStrip::ResizeLayoutTabsFromTouch() {
// Don't resize if the user is interacting with the tabstrip.
if (!drag_context_->IsDragSessionActive())
ResizeLayoutTabs();
else
StartResizeLayoutTabsFromTouchTimer();
}
void TabStrip::StartResizeLayoutTabsFromTouchTimer() {
// Amount of time we delay before resizing after a close from a touch.
constexpr auto kTouchResizeLayoutTime = base::TimeDelta::FromSeconds(2);
resize_layout_timer_.Stop();
resize_layout_timer_.Start(FROM_HERE, kTouchResizeLayoutTime, this,
&TabStrip::ResizeLayoutTabsFromTouch);
}
void TabStrip::AddMessageLoopObserver() {
if (!mouse_watcher_) {
constexpr int kTabStripAnimationVSlop = 40;
mouse_watcher_ = std::make_unique<views::MouseWatcher>(
std::make_unique<views::MouseWatcherViewHost>(
this, gfx::Insets(0, 0, kTabStripAnimationVSlop, 0)),
this);
}
mouse_watcher_->Start(GetWidget()->GetNativeWindow());
}
void TabStrip::RemoveMessageLoopObserver() {
mouse_watcher_ = nullptr;
}
gfx::Rect TabStrip::GetDropBounds(int drop_index,
bool drop_before,
bool* is_beneath) {
DCHECK_NE(drop_index, -1);
Tab* tab = tab_at(std::min(drop_index, tab_count() - 1));
int center_x = tab->x();
const int width = tab->width();
const int overlap = TabStyle::GetTabOverlap();
if (drop_index < tab_count())
center_x += drop_before ? (overlap / 2) : (width / 2);
else
center_x += width - (overlap / 2);
// Mirror the center point if necessary.
center_x = GetMirroredXInView(center_x);
// Determine the screen bounds.
gfx::Point drop_loc(center_x - g_drop_indicator_width / 2,
-g_drop_indicator_height);
ConvertPointToScreen(this, &drop_loc);
gfx::Rect drop_bounds(drop_loc.x(), drop_loc.y(), g_drop_indicator_width,
g_drop_indicator_height);
// If the rect doesn't fit on the monitor, push the arrow to the bottom.
display::Screen* screen = display::Screen::GetScreen();
display::Display display = screen->GetDisplayMatching(drop_bounds);
*is_beneath = !display.bounds().Contains(drop_bounds);
if (*is_beneath)
drop_bounds.Offset(0, drop_bounds.height() + height());
return drop_bounds;
}
void TabStrip::SetDropArrow(
const base::Optional<BrowserRootView::DropIndex>& index) {
if (!index) {
controller_->OnDropIndexUpdate(-1, false);
drop_arrow_.reset();
return;
}
// Let the controller know of the index update.
controller_->OnDropIndexUpdate(index->value, index->drop_before);
if (drop_arrow_ && (index == drop_arrow_->index()))
return;
bool is_beneath;
gfx::Rect drop_bounds =
GetDropBounds(index->value, index->drop_before, &is_beneath);
if (!drop_arrow_) {
drop_arrow_ = std::make_unique<DropArrow>(*index, !is_beneath, GetWidget());
} else {
drop_arrow_->set_index(*index);
drop_arrow_->SetPointDown(!is_beneath);
}
// Reposition the window.
drop_arrow_->SetWindowBounds(drop_bounds);
}
// static
gfx::ImageSkia* TabStrip::GetDropArrowImage(bool is_down) {
return ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
is_down ? IDR_TAB_DROP_DOWN : IDR_TAB_DROP_UP);
}
// TabStrip:TabContextMenuController:
// ----------------------------------------------------------
TabStrip::TabContextMenuController::TabContextMenuController(TabStrip* parent)
: parent_(parent) {}
void TabStrip::TabContextMenuController::ShowContextMenuForViewImpl(
views::View* source,
const gfx::Point& point,
ui::MenuSourceType source_type) {
// We are only intended to be installed as a context-menu handler for tabs, so
// this cast should be safe.
DCHECK_EQ(Tab::kViewClassName, source->GetClassName());
Tab* const tab = static_cast<Tab*>(source);
if (tab->closing())
return;
parent_->controller()->ShowContextMenuForTab(tab, point, source_type);
}
// TabStrip:DropArrow:
// ----------------------------------------------------------
TabStrip::DropArrow::DropArrow(const BrowserRootView::DropIndex& index,
bool point_down,
views::Widget* context)
: index_(index), point_down_(point_down) {
arrow_view_ = new views::ImageView;
arrow_view_->SetImage(GetDropArrowImage(point_down_));
arrow_window_ = new views::Widget;
views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
params.z_order = ui::ZOrderLevel::kFloatingUIElement;
params.opacity = views::Widget::InitParams::WindowOpacity::kTranslucent;
params.accept_events = false;
params.bounds = gfx::Rect(g_drop_indicator_width, g_drop_indicator_height);
params.context = context->GetNativeWindow();
arrow_window_->Init(std::move(params));
arrow_window_->SetContentsView(arrow_view_);
scoped_observer_.Add(arrow_window_);
arrow_window_->Show();
}
TabStrip::DropArrow::~DropArrow() {
// Close eventually deletes the window, which deletes arrow_view too.
if (arrow_window_)
arrow_window_->Close();
}
void TabStrip::DropArrow::SetPointDown(bool down) {
if (point_down_ == down)
return;
point_down_ = down;
arrow_view_->SetImage(GetDropArrowImage(point_down_));
}
void TabStrip::DropArrow::SetWindowBounds(const gfx::Rect& bounds) {
arrow_window_->SetBounds(bounds);
}
void TabStrip::DropArrow::OnWidgetDestroying(views::Widget* widget) {
scoped_observer_.Remove(arrow_window_);
arrow_window_ = nullptr;
}
///////////////////////////////////////////////////////////////////////////////
void TabStrip::PrepareForAnimation() {
if (!drag_context_->IsDragSessionActive() &&
!TabDragController::IsAttachedTo(GetDragContext())) {
for (int i = 0; i < tab_count(); ++i)
tab_at(i)->set_dragging(false);
}
}
void TabStrip::UpdateIdealBounds() {
if (tab_count() == 0)
return; // Should only happen during creation/destruction, ignore.
if (!touch_layout_) {
const int available_width =
override_available_width_for_tabs_.value_or(GetTabAreaWidth());
layout_helper_->UpdateIdealBounds(available_width);
}
new_tab_button_ideal_bounds_.set_origin(
gfx::Point(GetNewTabButtonIdealX(), 0));
}
int TabStrip::UpdateIdealBoundsForPinnedTabs(int* first_non_pinned_index) {
layout_helper_->UpdateIdealBoundsForPinnedTabs();
if (first_non_pinned_index)
*first_non_pinned_index = layout_helper_->first_non_pinned_tab_index();
return layout_helper_->first_non_pinned_tab_x();
}
void TabStrip::StartResizeLayoutAnimation() {
PrepareForAnimation();
UpdateIdealBounds();
AnimateToIdealBounds();
}
void TabStrip::StartPinnedTabAnimation() {
ExitTabClosingMode();
PrepareForAnimation();
UpdateIdealBounds();
AnimateToIdealBounds();
}
bool TabStrip::IsPointInTab(Tab* tab,
const gfx::Point& point_in_tabstrip_coords) {
if (!tab->GetVisible())
return false;
gfx::Point point_in_tab_coords(point_in_tabstrip_coords);
View::ConvertPointToTarget(this, tab, &point_in_tab_coords);
return tab->HitTestPoint(point_in_tab_coords);
}
Tab* TabStrip::FindTabForEvent(const gfx::Point& point) {
DCHECK(touch_layout_);
int active_tab_index = touch_layout_->active_index();
Tab* tab = FindTabForEventFrom(point, active_tab_index, -1);
return tab ? tab : FindTabForEventFrom(point, active_tab_index + 1, 1);
}
Tab* TabStrip::FindTabForEventFrom(const gfx::Point& point,
int start,
int delta) {
// |start| equals tab_count() when there are only pinned tabs.
if (start == tab_count())
start += delta;
for (int i = start; i >= 0 && i < tab_count(); i += delta) {
if (IsPointInTab(tab_at(i), point))
return tab_at(i);
}
return nullptr;
}
Tab* TabStrip::FindTabHitByPoint(const gfx::Point& point) {
// Check all tabs, even closing tabs. Mouse events need to reach closing tabs
// for users to be able to rapidly middle-click close several tabs.
std::vector<Tab*> all_tabs = layout_helper_->GetTabs();
// The display order doesn't necessarily match the child order, so we iterate
// in display order.
for (size_t i = 0; i < all_tabs.size(); ++i) {
// If we don't first exclude points outside the current tab, the code below
// will return the wrong tab if the next tab is selected, the following tab
// is active, and |point| is in the overlap region between the two.
Tab* tab = all_tabs[i];
if (!IsPointInTab(tab, point))
continue;
// Selected tabs render atop unselected ones, and active tabs render atop
// everything. Check whether the next tab renders atop this one and |point|
// is in the overlap region.
Tab* next_tab = i < (all_tabs.size() - 1) ? all_tabs[i + 1] : nullptr;
if (next_tab &&
(next_tab->IsActive() ||
(next_tab->IsSelected() && !tab->IsSelected())) &&
IsPointInTab(next_tab, point))
return next_tab;
// This is the topmost tab for this point.
return tab;
}
return nullptr;
}
void TabStrip::SwapLayoutIfNecessary() {
// TODO(crbug.com/1053707): Tab groups is disabled with stacked tabs to
// prevent crashes during development. This will not impact users unless tab
// groups are manually enabled.
// Tab groups should only be rolled out on devices where
// features::kWebUITabStrip is enabled which is mutually exclusive with
// stacked tabs.
bool needs_touch =
NeedsTouchLayout() && !base::FeatureList::IsEnabled(features::kTabGroups);
bool using_touch = touch_layout_ != nullptr;
if (needs_touch == using_touch)
return;
if (needs_touch) {
const int overlap = TabStyle::GetTabOverlap();
touch_layout_ = std::make_unique<StackedTabStripLayout>(
gfx::Size(GetStackableTabWidth(), GetLayoutConstant(TAB_HEIGHT)),
overlap, kStackedPadding, kMaxStackedCount, &tabs_);
touch_layout_->SetWidth(GetTabAreaWidth());
// This has to be after SetWidth() as SetWidth() is going to reset the
// bounds of the pinned tabs (since StackedTabStripLayout doesn't yet know
// how many pinned tabs there are).
touch_layout_->SetXAndPinnedCount(UpdateIdealBoundsForPinnedTabs(nullptr),
GetPinnedTabCount());
touch_layout_->SetActiveIndex(controller_->GetActiveIndex());
base::RecordAction(
base::UserMetricsAction("StackedTab_EnteredStackedLayout"));
} else {
touch_layout_.reset();
}
PrepareForAnimation();
UpdateIdealBounds();
SetTabVisibility();
AnimateToIdealBounds();
}
bool TabStrip::NeedsTouchLayout() const {
if (!stacked_layout_)
return false;
const int pinned_tab_count = GetPinnedTabCount();
const int normal_count = tab_count() - pinned_tab_count;
if (normal_count <= 1)
return false;
const int tab_overlap = TabStyle::GetTabOverlap();
const int normal_width =
(GetStackableTabWidth() - tab_overlap) * normal_count + tab_overlap;
const int pinned_width =
std::max(0, pinned_tab_count * TabStyle::GetPinnedWidth() - tab_overlap);
return normal_width > (GetTabAreaWidth() - pinned_width);
}
void TabStrip::SetResetToShrinkOnExit(bool value) {
if (!adjust_layout_)
return;
// We have to be using stacked layout to reset out of it.
value &= stacked_layout_;
if (value == reset_to_shrink_on_exit_)
return;
reset_to_shrink_on_exit_ = value;
// Add an observer so we know when the mouse moves out of the tabstrip.
if (reset_to_shrink_on_exit_)
AddMessageLoopObserver();
else
RemoveMessageLoopObserver();
}
void TabStrip::UpdateNewTabButtonBorder() {
// The button is placed vertically exactly in the center of the tabstrip.
const int extra_vertical_space = GetLayoutConstant(TAB_HEIGHT) -
GetLayoutConstant(TABSTRIP_TOOLBAR_OVERLAP) -
NewTabButton::kButtonSize.height();
constexpr int kHorizontalInset = 8;
new_tab_button_->SetBorder(views::CreateEmptyBorder(gfx::Insets(
extra_vertical_space / 2, kHorizontalInset, 0, kHorizontalInset)));
}
void TabStrip::ButtonPressed(views::Button* sender, const ui::Event& event) {
if (sender == new_tab_button_) {
base::RecordAction(base::UserMetricsAction("NewTab_Button"));
UMA_HISTOGRAM_ENUMERATION("Tab.NewTab", TabStripModel::NEW_TAB_BUTTON,
TabStripModel::NEW_TAB_ENUM_COUNT);
if (event.IsMouseEvent()) {
// Prevent the hover card from popping back in immediately. This forces a
// normal fade-in.
if (hover_card_)
hover_card_->set_last_mouse_exit_timestamp(base::TimeTicks());
const ui::MouseEvent& mouse = static_cast<const ui::MouseEvent&>(event);
if (mouse.IsOnlyMiddleMouseButton()) {
if (ui::Clipboard::IsSupportedClipboardBuffer(
ui::ClipboardBuffer::kSelection)) {
ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
CHECK(clipboard);
base::string16 clipboard_text;
clipboard->ReadText(ui::ClipboardBuffer::kSelection, &clipboard_text);
if (!clipboard_text.empty())
controller_->CreateNewTabWithLocation(clipboard_text);
}
return;
}
}
controller_->CreateNewTab();
if (event.type() == ui::ET_GESTURE_TAP)
TouchUMA::RecordGestureAction(TouchUMA::kGestureNewTabTap);
}
}
// Overridden to support automation. See automation_proxy_uitest.cc.
const views::View* TabStrip::GetViewByID(int view_id) const {
if (tab_count() > 0) {
if (view_id == VIEW_ID_TAB_LAST)
return tab_at(tab_count() - 1);
if ((view_id >= VIEW_ID_TAB_0) && (view_id < VIEW_ID_TAB_LAST)) {
int index = view_id - VIEW_ID_TAB_0;
return (index >= 0 && index < tab_count()) ? tab_at(index) : nullptr;
}
}
return View::GetViewByID(view_id);
}
bool TabStrip::OnMousePressed(const ui::MouseEvent& event) {
UpdateStackedLayoutFromMouseEvent(this, event);
// We can't return true here, else clicking in an empty area won't drag the
// window.
return false;
}
bool TabStrip::OnMouseDragged(const ui::MouseEvent& event) {
ContinueDrag(this, event);
return true;
}
void TabStrip::OnMouseReleased(const ui::MouseEvent& event) {
EndDrag(END_DRAG_COMPLETE);
UpdateStackedLayoutFromMouseEvent(this, event);
}
void TabStrip::OnMouseCaptureLost() {
EndDrag(END_DRAG_CAPTURE_LOST);
}
void TabStrip::OnMouseMoved(const ui::MouseEvent& event) {
UpdateStackedLayoutFromMouseEvent(this, event);
}
void TabStrip::OnMouseEntered(const ui::MouseEvent& event) {
mouse_entered_tabstrip_time_ = base::TimeTicks::Now();
SetResetToShrinkOnExit(true);
}
void TabStrip::OnMouseExited(const ui::MouseEvent& event) {
if (base::FeatureList::IsEnabled(features::kTabHoverCards) && hover_card_ &&
hover_card_->IsVisible()) {
hover_card_->set_last_mouse_exit_timestamp(base::TimeTicks::Now());
}
UpdateHoverCard(nullptr);
}
void TabStrip::AddedToWidget() {
GetWidget()->AddObserver(this);
}
void TabStrip::RemovedFromWidget() {
GetWidget()->RemoveObserver(this);
}
void TabStrip::OnGestureEvent(ui::GestureEvent* event) {
SetResetToShrinkOnExit(false);
switch (event->type()) {
case ui::ET_GESTURE_SCROLL_END:
case ui::ET_SCROLL_FLING_START:
case ui::ET_GESTURE_END:
EndDrag(END_DRAG_COMPLETE);
if (adjust_layout_) {
SetStackedLayout(true);
controller_->StackedLayoutMaybeChanged();
}
break;
case ui::ET_GESTURE_LONG_PRESS:
drag_context_->SetMoveBehavior(TabDragController::REORDER);
break;
case ui::ET_GESTURE_LONG_TAP: {
EndDrag(END_DRAG_CANCEL);
gfx::Point local_point = event->location();
Tab* tab = touch_layout_ ? FindTabForEvent(local_point)
: FindTabHitByPoint(local_point);
if (tab) {
ConvertPointToScreen(this, &local_point);
controller_->ShowContextMenuForTab(tab, local_point,
ui::MENU_SOURCE_TOUCH);
}
break;
}
case ui::ET_GESTURE_SCROLL_UPDATE:
ContinueDrag(this, *event);
break;
case ui::ET_GESTURE_TAP_DOWN:
EndDrag(END_DRAG_CANCEL);
break;
case ui::ET_GESTURE_TAP: {
const int active_index = controller_->GetActiveIndex();
DCHECK_NE(-1, active_index);
Tab* active_tab = tab_at(active_index);
TouchUMA::GestureActionType action = TouchUMA::kGestureTabNoSwitchTap;
if (active_tab->tab_activated_with_last_tap_down())
action = TouchUMA::kGestureTabSwitchTap;
TouchUMA::RecordGestureAction(action);
break;
}
default:
break;
}
event->SetHandled();
}
views::View* TabStrip::TargetForRect(views::View* root, const gfx::Rect& rect) {
CHECK_EQ(root, this);
if (!views::UsePointBasedTargeting(rect))
return views::ViewTargeterDelegate::TargetForRect(root, rect);
const gfx::Point point(rect.CenterPoint());
if (!touch_layout_) {
// Return any view that isn't a Tab or this TabStrip immediately. We don't
// want to interfere.
views::View* v = views::ViewTargeterDelegate::TargetForRect(root, rect);
if (v && v != this && strcmp(v->GetClassName(), Tab::kViewClassName))
return v;
views::View* tab = FindTabHitByPoint(point);
if (tab)
return tab;
} else {
if (new_tab_button_->GetVisible()) {
views::View* view =
ConvertPointToViewAndGetEventHandler(this, new_tab_button_, point);
if (view)
return view;
}
Tab* tab = FindTabForEvent(point);
if (tab)
return ConvertPointToViewAndGetEventHandler(this, tab, point);
}
return this;
}
void TabStrip::OnViewIsDeleting(views::View* observed_view) {
if (observed_view == hover_card_) {
hover_card_observer_.Remove(hover_card_);
hover_card_event_sniffer_.reset();
hover_card_ = nullptr;
}
}
void TabStrip::OnViewFocused(views::View* observed_view) {
if (observed_view == new_tab_button_)
UpdateHoverCard(nullptr);
int index = tabs_.GetIndexOfView(observed_view);
if (index != -1)
controller_->OnKeyboardFocusedTabChanged(index);
}
void TabStrip::OnViewBlurred(views::View* observed_view) {
controller_->OnKeyboardFocusedTabChanged(base::nullopt);
}
void TabStrip::OnTouchUiChanged() {
UpdateNewTabButtonBorder();
new_tab_button_ideal_bounds_.set_size(new_tab_button_->GetPreferredSize());
new_tab_button_->SetBoundsRect(new_tab_button_ideal_bounds_);
StopAnimating(true);
PreferredSizeChanged();
}