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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/core/editing/finder/text_finder.h"
#include "third_party/blink/public/mojom/input/focus_type.mojom-blink.h"
#include "third_party/blink/public/mojom/scroll/scroll_into_view_params.mojom-blink.h"
#include "third_party/blink/public/platform/web_float_rect.h"
#include "third_party/blink/public/platform/web_vector.h"
#include "third_party/blink/public/web/web_frame_widget.h"
#include "third_party/blink/public/web/web_local_frame_client.h"
#include "third_party/blink/public/web/web_view_client.h"
#include "third_party/blink/renderer/core/accessibility/ax_object_cache_base.h"
#include "third_party/blink/renderer/core/display_lock/display_lock_utilities.h"
#include "third_party/blink/renderer/core/dom/range.h"
#include "third_party/blink/renderer/core/dom/shadow_root.h"
#include "third_party/blink/renderer/core/editing/editing_utilities.h"
#include "third_party/blink/renderer/core/editing/editor.h"
#include "third_party/blink/renderer/core/editing/ephemeral_range.h"
#include "third_party/blink/renderer/core/editing/finder/find_in_page_coordinates.h"
#include "third_party/blink/renderer/core/editing/finder/find_options.h"
#include "third_party/blink/renderer/core/editing/finder/find_task_controller.h"
#include "third_party/blink/renderer/core/editing/frame_selection.h"
#include "third_party/blink/renderer/core/editing/markers/document_marker.h"
#include "third_party/blink/renderer/core/editing/markers/document_marker_controller.h"
#include "third_party/blink/renderer/core/editing/selection_template.h"
#include "third_party/blink/renderer/core/editing/visible_selection.h"
#include "third_party/blink/renderer/core/exported/web_view_impl.h"
#include "third_party/blink/renderer/core/frame/find_in_page.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h"
#include "third_party/blink/renderer/core/layout/layout_object.h"
#include "third_party/blink/renderer/core/layout/layout_view.h"
#include "third_party/blink/renderer/core/layout/text_autosizer.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/platform/instrumentation/histogram.h"
#include "third_party/blink/renderer/platform/timer.h"
namespace blink {
TextFinder::FindMatch::FindMatch(Range* range, int ordinal)
: range_(range), ordinal_(ordinal) {}
void TextFinder::FindMatch::Trace(Visitor* visitor) {
visitor->Trace(range_);
}
static void ScrollToVisible(Range* match) {
const EphemeralRangeInFlatTree range(match);
const Node& first_node = *match->FirstNode();
if (RuntimeEnabledFeatures::BeforeMatchEventEnabled()) {
// Find-in-page matches can't span multiple block-level elements (because
// the text will be broken by newlines between blocks), so first we find the
// block-level element which contains the match.
// This means we only need to traverse up from one node in the range, in
// this case we are traversing from the start position of the range.
Element* enclosing_block =
EnclosingBlock(range.StartPosition(), kCannotCrossEditingBoundary);
DCHECK(enclosing_block);
// Note that we don't check the `range.EndPosition()` since we just activate
// the beginning of the range. In find-in-page cases, the end position is
// the same since the matches cannot cross block boundaries. However, in
// scroll-to-text, the range might be different, but we still just activate
// the beginning of the range. See
// https://github.com/WICG/display-locking/issues/125 for more details.
enclosing_block->DispatchEvent(
*Event::Create(event_type_names::kBeforematch));
// TODO(jarhar): Consider what to do based on DOM/style modifications made
// by the beforematch event here and write tests for it once we decide on a
// behavior here: https://github.com/WICG/display-locking/issues/150
}
// The beforematch event may detach the target element from the DOM.
if (!first_node.isConnected())
return;
if (RuntimeEnabledFeatures::CSSContentVisibilityEnabled()) {
// TODO(vmpstr): Rework this, since it is only used for bookkeeping.
DisplayLockUtilities::ActivateFindInPageMatchRangeIfNeeded(range);
// We need to update the style and layout since the event dispatched may
// have modified it, and we need up-to-date layout to ScrollRectToVisible
// below.
first_node.GetDocument().UpdateStyleAndLayoutForNode(
&first_node, DocumentUpdateReason::kFindInPage);
}
Settings* settings = first_node.GetDocument().GetSettings();
bool smooth_find_enabled =
settings ? settings->GetSmoothScrollForFindEnabled() : false;
mojom::blink::ScrollBehavior scroll_behavior =
smooth_find_enabled ? mojom::blink::ScrollBehavior::kSmooth
: mojom::blink::ScrollBehavior::kAuto;
first_node.GetLayoutObject()->ScrollRectToVisible(
PhysicalRect(match->BoundingBox()),
ScrollAlignment::CreateScrollIntoViewParams(
ScrollAlignment::CenterIfNeeded(), ScrollAlignment::CenterIfNeeded(),
mojom::blink::ScrollType::kUser,
true /* make_visible_in_visual_viewport */, scroll_behavior,
true /* is_for_scroll_sequence */));
first_node.GetDocument().SetSequentialFocusNavigationStartingPoint(
const_cast<Node*>(&first_node));
}
bool TextFinder::Find(int identifier,
const WebString& search_text,
const mojom::blink::FindOptions& options,
bool wrap_within_frame,
bool* active_now) {
if (!options.find_next) {
// This find-in-page is redone due to the frame finishing loading.
// If we can, just reuse the old active match;
if (options.force && active_match_) {
should_locate_active_rect_ = true;
return true;
}
UnmarkAllTextMatches();
} else {
SetMarkerActive(active_match_.Get(), false);
}
if (active_match_ &&
&active_match_->OwnerDocument() != OwnerFrame().GetFrame()->GetDocument())
active_match_ = nullptr;
// If the user has selected something since the last Find operation we want
// to start from there. Otherwise, we start searching from where the last Find
// operation left off (either a Find or a FindNext operation).
// TODO(editing-dev): The use of VisibleSelection should be audited. See
// crbug.com/657237 for details.
VisibleSelection selection(
OwnerFrame().GetFrame()->Selection().ComputeVisibleSelectionInDOMTree());
bool active_selection = !selection.IsNone();
if (active_selection) {
active_match_ = CreateRange(FirstEphemeralRangeOf(selection));
OwnerFrame().GetFrame()->Selection().Clear();
}
DCHECK(OwnerFrame().GetFrame());
DCHECK(OwnerFrame().GetFrame()->View());
const FindOptions find_options =
(options.forward ? 0 : kBackwards) |
(options.match_case ? 0 : kCaseInsensitive) |
(wrap_within_frame ? kWrapAround : 0) |
(options.find_next ? 0 : kStartInSelection);
active_match_ = Editor::FindRangeOfString(
*OwnerFrame().GetFrame()->GetDocument(), search_text,
EphemeralRangeInFlatTree(active_match_.Get()), find_options);
if (!active_match_) {
if (current_active_match_frame_ && !options.find_next)
should_locate_active_rect_ = true;
// If we're finding next the next active match might not be in the current
// frame. In this case we don't want to clear the matches cache.
if (!options.find_next)
ClearFindMatchesCache();
InvalidatePaintForTickmarks();
return false;
}
ScrollToVisible(active_match_);
// If the user is browsing a page with autosizing, adjust the zoom to the
// column where the next hit has been found. Doing this when autosizing is
// not set will result in a zoom reset on small devices.
if (OwnerFrame()
.GetFrame()
->GetDocument()
->GetTextAutosizer()
->PageNeedsAutosizing()) {
OwnerFrame().LocalRoot()->FrameWidget()->ZoomToFindInPageRect(
OwnerFrame().GetFrameView()->ConvertToRootFrame(
ComputeTextRect(EphemeralRange(active_match_.Get()))));
}
bool was_active_frame = current_active_match_frame_;
current_active_match_frame_ = true;
bool is_active = SetMarkerActive(active_match_.Get(), true);
if (active_now)
*active_now = is_active;
// Make sure no node is focused. See http://crbug.com/38700.
OwnerFrame().GetFrame()->GetDocument()->ClearFocusedElement();
// Set this frame as focused.
OwnerFrame().ViewImpl()->SetFocusedFrame(&OwnerFrame());
if (!options.find_next || active_selection || !is_active) {
// This is either an initial Find operation, a Find-next from a new
// start point due to a selection, or new matches were found during
// Find-next due to DOM alteration (that couldn't be set as active), so
// we set the flag to ask the scoping effort to find the active rect for
// us and report it back to the UI.
should_locate_active_rect_ = true;
} else {
if (!was_active_frame) {
if (options.forward)
active_match_index_ = 0;
else
active_match_index_ = find_task_controller_->CurrentMatchCount() - 1;
} else {
if (options.forward)
++active_match_index_;
else
--active_match_index_;
if (active_match_index_ + 1 > find_task_controller_->CurrentMatchCount())
active_match_index_ = 0;
else if (active_match_index_ < 0)
active_match_index_ = find_task_controller_->CurrentMatchCount() - 1;
}
gfx::Rect selection_rect = OwnerFrame().GetFrameView()->ConvertToRootFrame(
active_match_->BoundingBox());
ReportFindInPageSelection(selection_rect, active_match_index_ + 1,
identifier);
}
// We found something, so the result of the previous scoping may be outdated.
find_task_controller_->ResetLastFindRequestCompletedWithNoMatches();
return true;
}
void TextFinder::ClearActiveFindMatch() {
current_active_match_frame_ = false;
SetMarkerActive(active_match_.Get(), false);
ResetActiveMatch();
}
LocalFrame* TextFinder::GetFrame() const {
return OwnerFrame().GetFrame();
}
void TextFinder::SetFindEndstateFocusAndSelection() {
if (!ActiveMatchFrame())
return;
Range* active_match = ActiveMatch();
if (!active_match)
return;
// If the user has set the selection since the match was found, we
// don't focus anything.
if (!GetFrame()->Selection().GetSelectionInDOMTree().IsNone())
return;
// Need to clean out style and layout state before querying
// Element::isFocusable().
GetFrame()->GetDocument()->UpdateStyleAndLayout(
DocumentUpdateReason::kFindInPage);
// Try to find the first focusable node up the chain, which will, for
// example, focus links if we have found text within the link.
Node* node = active_match->FirstNode();
if (node && node->IsInShadowTree()) {
if (Node* host = node->OwnerShadowHost()) {
if (IsA<HTMLInputElement>(*host) || IsA<HTMLTextAreaElement>(*host))
node = host;
}
}
const EphemeralRange active_match_range(active_match);
if (node) {
for (Node& runner : NodeTraversal::InclusiveAncestorsOf(*node)) {
auto* element = DynamicTo<Element>(runner);
if (!element)
continue;
if (element->IsFocusable()) {
// Found a focusable parent node. Set the active match as the
// selection and focus to the focusable node.
GetFrame()->Selection().SetSelectionAndEndTyping(
SelectionInDOMTree::Builder()
.SetBaseAndExtent(active_match_range)
.Build());
GetFrame()->GetDocument()->SetFocusedElement(
element, FocusParams(SelectionBehaviorOnFocus::kNone,
mojom::blink::FocusType::kNone, nullptr));
return;
}
}
}
// Iterate over all the nodes in the range until we find a focusable node.
// This, for example, sets focus to the first link if you search for
// text and text that is within one or more links.
for (Node& runner : active_match_range.Nodes()) {
auto* element = DynamicTo<Element>(runner);
if (!element)
continue;
if (element->IsFocusable()) {
GetFrame()->GetDocument()->SetFocusedElement(
element, FocusParams(SelectionBehaviorOnFocus::kNone,
mojom::blink::FocusType::kNone, nullptr));
return;
}
}
// No node related to the active match was focusable, so set the
// active match as the selection (so that when you end the Find session,
// you'll have the last thing you found highlighted) and make sure that
// we have nothing focused (otherwise you might have text selected but
// a link focused, which is weird).
GetFrame()->Selection().SetSelectionAndEndTyping(
SelectionInDOMTree::Builder()
.SetBaseAndExtent(active_match_range)
.Build());
GetFrame()->GetDocument()->ClearFocusedElement();
// Finally clear the active match, for two reasons:
// We just finished the find 'session' and we don't want future (potentially
// unrelated) find 'sessions' operations to start at the same place.
// The WebLocalFrameImpl could get reused and the activeMatch could end up
// pointing to a document that is no longer valid. Keeping an invalid
// reference around is just asking for trouble.
ResetActiveMatch();
}
void TextFinder::StopFindingAndClearSelection() {
CancelPendingScopingEffort();
// Remove all markers for matches found and turn off the highlighting.
OwnerFrame().GetFrame()->GetDocument()->Markers().RemoveMarkersOfTypes(
DocumentMarker::MarkerTypes::TextMatch());
OwnerFrame().GetFrame()->GetEditor().SetMarkedTextMatchesAreHighlighted(
false);
ClearFindMatchesCache();
ResetActiveMatch();
// Let the frame know that we don't want tickmarks anymore.
InvalidatePaintForTickmarks();
ReportFindInPageTerminationToAccessibility();
}
void TextFinder::ReportFindInPageTerminationToAccessibility() {
GetFrame()
->GetLocalFrameHostRemote()
.HandleAccessibilityFindInPageTermination();
}
void TextFinder::ReportFindInPageResultToAccessibility(int identifier) {
if (!active_match_)
return;
auto* ax_object_cache =
OwnerFrame().GetFrame()->GetDocument()->ExistingAXObjectCache();
if (!ax_object_cache)
return;
Node* start_node = active_match_->startContainer();
Node* end_node = active_match_->endContainer();
ax_object_cache->HandleTextMarkerDataAdded(start_node, end_node);
int32_t start_id = ax_object_cache->GetAXID(start_node);
int32_t end_id = ax_object_cache->GetAXID(end_node);
auto params = mojom::blink::FindInPageResultAXParams::New(
identifier, active_match_index_ + 1, start_id,
active_match_->startOffset(), end_id, active_match_->endOffset());
GetFrame()->GetLocalFrameHostRemote().HandleAccessibilityFindInPageResult(
std::move(params));
}
void TextFinder::StartScopingStringMatches(
int identifier,
const WebString& search_text,
const mojom::blink::FindOptions& options) {
CancelPendingScopingEffort();
// This is a brand new search, so we need to reset everything.
// Scoping is just about to begin.
scoping_in_progress_ = true;
// Need to keep the current identifier locally in order to finish the
// request in case the frame is detached during the process.
find_request_identifier_ = identifier;
// Clear highlighting for this frame.
UnmarkAllTextMatches();
// Clear the tickmarks and results cache.
ClearFindMatchesCache();
// Clear the total match count and increment markers version.
ResetMatchCount();
// Clear the counter from last operation.
next_invalidate_after_ = 0;
// The view might be null on detached frames.
LocalFrame* frame = OwnerFrame().GetFrame();
if (frame && frame->GetPage())
frame_scoping_ = true;
find_task_controller_->StartRequest(identifier, search_text, options);
}
void TextFinder::FlushCurrentScopingEffort(int identifier) {
if (!OwnerFrame().GetFrame() || !OwnerFrame().GetFrame()->GetPage())
return;
frame_scoping_ = false;
IncreaseMatchCount(identifier, 0);
}
void TextFinder::DidFindMatch(int identifier,
int current_total_matches,
Range* result_range) {
// Catch a special case where Find found something but doesn't know what
// the bounding box for it is. In this case we set the first match we find
// as the active rect.
bool found_active_match = false;
if (should_locate_active_rect_) {
IntRect result_bounds = result_range->BoundingBox();
IntRect active_selection_rect =
active_match_.Get() ? active_match_->BoundingBox() : result_bounds;
// If the Find function found a match it will have stored where the
// match was found in active_selection_rect_ on the current frame. If we
// find this rect during scoping it means we have found the active
// tickmark.
if (active_selection_rect == result_bounds) {
// We have found the active tickmark frame.
current_active_match_frame_ = true;
found_active_match = true;
// We also know which tickmark is active now.
active_match_index_ = current_total_matches - 1;
// To stop looking for the active tickmark, we set this flag.
should_locate_active_rect_ = false;
// Notify browser of new location for the selected rectangle.
ReportFindInPageSelection(
OwnerFrame().GetFrameView()->ConvertToRootFrame(result_bounds),
active_match_index_ + 1, identifier);
}
}
OwnerFrame().GetFrame()->GetDocument()->Markers().AddTextMatchMarker(
EphemeralRange(result_range),
found_active_match ? TextMatchMarker::MatchStatus::kActive
: TextMatchMarker::MatchStatus::kInactive);
find_matches_cache_.push_back(FindMatch(result_range, current_total_matches));
}
void TextFinder::UpdateMatches(int identifier,
int found_match_count,
bool finished_whole_request) {
GetFrame()->GetEditor().SetMarkedTextMatchesAreHighlighted(true);
// Let the frame know how many matches we found during this pass.
IncreaseMatchCount(identifier, found_match_count);
// If we found anything during this pass, we should redraw. However, we
// don't want to spam too much if the page is extremely long, so if we
// reach a certain point we start throttling the redraw requests.
if (!finished_whole_request)
InvalidateIfNecessary();
}
void TextFinder::FinishCurrentScopingEffort(int identifier) {
scoping_in_progress_ = false;
if (!OwnerFrame().GetFrame())
return;
if (!total_match_count_)
OwnerFrame().GetFrame()->Selection().Clear();
FlushCurrentScopingEffort(identifier);
// This frame is done, so show any scrollbar tickmarks we haven't drawn yet.
InvalidatePaintForTickmarks();
}
void TextFinder::CancelPendingScopingEffort() {
active_match_index_ = -1;
scoping_in_progress_ = false;
find_task_controller_->CancelPendingRequest();
}
void TextFinder::IncreaseMatchCount(int identifier, int count) {
if (count)
++find_match_markers_version_;
total_match_count_ += count;
// Update the UI with the latest findings.
OwnerFrame().GetFindInPage()->ReportFindInPageMatchCount(
identifier, total_match_count_, !frame_scoping_);
}
void TextFinder::ReportFindInPageSelection(const gfx::Rect& selection_rect,
int active_match_ordinal,
int identifier) {
// Update the UI with the latest selection rect.
OwnerFrame().GetFindInPage()->ReportFindInPageSelection(
identifier, active_match_ordinal, selection_rect,
false /* final_update */);
// Update accessibility too, so if the user commits to this query
// we can move accessibility focus to this result.
ReportFindInPageResultToAccessibility(identifier);
}
void TextFinder::ResetMatchCount() {
if (total_match_count_ > 0)
++find_match_markers_version_;
total_match_count_ = 0;
frame_scoping_ = false;
}
void TextFinder::ClearFindMatchesCache() {
if (!find_matches_cache_.IsEmpty())
++find_match_markers_version_;
find_matches_cache_.clear();
find_match_rects_are_valid_ = false;
}
void TextFinder::UpdateFindMatchRects() {
IntSize current_document_size = OwnerFrame().DocumentSize();
if (document_size_for_current_find_match_rects_ != current_document_size) {
document_size_for_current_find_match_rects_ = current_document_size;
find_match_rects_are_valid_ = false;
}
wtf_size_t dead_matches = 0;
for (FindMatch& match : find_matches_cache_) {
if (!match.range_->BoundaryPointsValid() ||
!match.range_->startContainer()->isConnected())
match.rect_ = FloatRect();
else if (!find_match_rects_are_valid_)
match.rect_ = FindInPageRectFromRange(EphemeralRange(match.range_.Get()));
if (match.rect_.IsEmpty())
++dead_matches;
}
// Remove any invalid matches from the cache.
if (dead_matches) {
HeapVector<FindMatch> filtered_matches;
filtered_matches.ReserveCapacity(find_matches_cache_.size() - dead_matches);
for (const FindMatch& match : find_matches_cache_) {
if (!match.rect_.IsEmpty())
filtered_matches.push_back(match);
}
find_matches_cache_.swap(filtered_matches);
}
find_match_rects_are_valid_ = true;
}
gfx::RectF TextFinder::ActiveFindMatchRect() {
if (!current_active_match_frame_ || !active_match_)
return gfx::RectF();
return gfx::RectF(FindInPageRectFromRange(EphemeralRange(ActiveMatch())));
}
Vector<gfx::RectF> TextFinder::FindMatchRects() {
UpdateFindMatchRects();
Vector<gfx::RectF> match_rects;
match_rects.ReserveCapacity(match_rects.size() + find_matches_cache_.size());
for (const FindMatch& match : find_matches_cache_) {
DCHECK(!match.rect_.IsEmpty());
match_rects.push_back(match.rect_);
}
return match_rects;
}
int TextFinder::SelectNearestFindMatch(const gfx::PointF& point,
gfx::Rect* selection_rect) {
int index = NearestFindMatch(FloatPoint(point), nullptr);
if (index != -1)
return SelectFindMatch(static_cast<unsigned>(index), selection_rect);
return -1;
}
int TextFinder::NearestFindMatch(const FloatPoint& point,
float* distance_squared) {
UpdateFindMatchRects();
int nearest = -1;
float nearest_distance_squared = FLT_MAX;
for (wtf_size_t i = 0; i < find_matches_cache_.size(); ++i) {
DCHECK(!find_matches_cache_[i].rect_.IsEmpty());
FloatSize offset = point - find_matches_cache_[i].rect_.Center();
float width = offset.Width();
float height = offset.Height();
float current_distance_squared = width * width + height * height;
if (current_distance_squared < nearest_distance_squared) {
nearest = i;
nearest_distance_squared = current_distance_squared;
}
}
if (distance_squared)
*distance_squared = nearest_distance_squared;
return nearest;
}
int TextFinder::SelectFindMatch(unsigned index, gfx::Rect* selection_rect) {
SECURITY_DCHECK(index < find_matches_cache_.size());
Range* range = find_matches_cache_[index].range_;
if (!range->BoundaryPointsValid() || !range->startContainer()->isConnected())
return -1;
// Check if the match is already selected.
if (!current_active_match_frame_ || !active_match_ ||
!AreRangesEqual(active_match_.Get(), range)) {
active_match_index_ = find_matches_cache_[index].ordinal_ - 1;
// Set this frame as the active frame (the one with the active highlight).
current_active_match_frame_ = true;
OwnerFrame().ViewImpl()->SetFocusedFrame(&OwnerFrame());
if (active_match_)
SetMarkerActive(active_match_.Get(), false);
active_match_ = range;
SetMarkerActive(active_match_.Get(), true);
// Clear any user selection, to make sure Find Next continues on from the
// match we just activated.
OwnerFrame().GetFrame()->Selection().Clear();
// Make sure no node is focused. See http://crbug.com/38700.
OwnerFrame().GetFrame()->GetDocument()->ClearFocusedElement();
}
IntRect active_match_rect;
IntRect active_match_bounding_box =
ComputeTextRect(EphemeralRange(active_match_.Get()));
if (!active_match_bounding_box.IsEmpty()) {
if (active_match_->FirstNode() &&
active_match_->FirstNode()->GetLayoutObject()) {
active_match_->FirstNode()->GetLayoutObject()->ScrollRectToVisible(
PhysicalRect(active_match_bounding_box),
ScrollAlignment::CreateScrollIntoViewParams(
ScrollAlignment::CenterIfNeeded(),
ScrollAlignment::CenterIfNeeded(),
mojom::blink::ScrollType::kUser));
// Absolute coordinates are scroll-variant so the bounding box will change
// if the page is scrolled by ScrollRectToVisible above. Recompute the
// bounding box so we have the updated location for the zoom below.
// TODO(bokan): This should really use the return value from
// ScrollRectToVisible which returns the updated position of the
// scrolled rect. However, this was recently added and this is a fix
// that needs to be merged to a release branch.
// https://crbug.com/823365.
active_match_bounding_box =
ComputeTextRect(EphemeralRange(active_match_.Get()));
}
// Zoom to the active match.
active_match_rect = OwnerFrame().GetFrameView()->ConvertToRootFrame(
active_match_bounding_box);
OwnerFrame().LocalRoot()->FrameWidget()->ZoomToFindInPageRect(
active_match_rect);
}
if (selection_rect)
*selection_rect = active_match_rect;
return active_match_index_ + 1;
}
TextFinder::TextFinder(WebLocalFrameImpl& owner_frame)
: owner_frame_(&owner_frame),
find_task_controller_(
MakeGarbageCollected<FindTaskController>(owner_frame, *this)),
current_active_match_frame_(false),
active_match_index_(-1),
total_match_count_(-1),
frame_scoping_(false),
find_request_identifier_(-1),
next_invalidate_after_(0),
find_match_markers_version_(0),
should_locate_active_rect_(false),
scoping_in_progress_(false),
find_match_rects_are_valid_(false) {}
bool TextFinder::SetMarkerActive(Range* range, bool active) {
if (!range || range->collapsed())
return false;
Document* document = OwnerFrame().GetFrame()->GetDocument();
document->SetFindInPageActiveMatchNode(active ? range->startContainer()
: nullptr);
return document->Markers().SetTextMatchMarkersActive(EphemeralRange(range),
active);
}
void TextFinder::UnmarkAllTextMatches() {
LocalFrame* frame = OwnerFrame().GetFrame();
if (frame && frame->GetPage() &&
frame->GetEditor().MarkedTextMatchesAreHighlighted()) {
frame->GetDocument()->Markers().RemoveMarkersOfTypes(
DocumentMarker::MarkerTypes::TextMatch());
}
}
void TextFinder::InvalidateIfNecessary() {
if (find_task_controller_->CurrentMatchCount() <= next_invalidate_after_)
return;
// FIXME: (http://crbug.com/6819) Optimize the drawing of the tickmarks and
// remove this. This calculation sets a milestone for when next to
// invalidate the scrollbar and the content area. We do this so that we
// don't spend too much time drawing the scrollbar over and over again.
// Basically, up until the first 500 matches there is no throttle.
// After the first 500 matches, we set set the milestone further and
// further out (750, 1125, 1688, 2K, 3K).
static const int kStartSlowingDownAfter = 500;
static const int kSlowdown = 750;
int i = find_task_controller_->CurrentMatchCount() / kStartSlowingDownAfter;
next_invalidate_after_ += i * kSlowdown;
InvalidatePaintForTickmarks();
}
void TextFinder::FlushCurrentScoping() {
FlushCurrentScopingEffort(find_request_identifier_);
}
void TextFinder::InvalidatePaintForTickmarks() {
OwnerFrame().GetFrame()->ContentLayoutObject()->InvalidatePaintForTickmarks();
}
void TextFinder::Trace(Visitor* visitor) {
visitor->Trace(owner_frame_);
visitor->Trace(find_task_controller_);
visitor->Trace(active_match_);
visitor->Trace(find_matches_cache_);
}
} // namespace blink