| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_ |
| #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_ |
| |
| #include <memory> |
| #include <optional> |
| |
| #include "base/functional/callback_forward.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/memory/raw_ptr.h" |
| #include "chrome/browser/ui/views/frame/browser_view.h" |
| #include "ui/base/metadata/metadata_header_macros.h" |
| #include "ui/views/widget/root_view.h" |
| |
| class ToolbarView; |
| |
| namespace ui { |
| class OSExchangeData; |
| } |
| |
| // RootView implementation used by BrowserFrame. This forwards drop events to |
| // the TabStrip. Visually the tabstrip extends to the top of the frame, but in |
| // actually it doesn't. The tabstrip is only as high as a tab. To enable |
| // dropping above the tabstrip BrowserRootView forwards drop events to the |
| // TabStrip. |
| class BrowserRootView : public views::internal::RootView { |
| METADATA_HEADER(BrowserRootView, views::internal::RootView) |
| |
| public: |
| struct DropIndex { |
| // The index within the tabstrip to drop on/before (see `relative_to_index` |
| // below). |
| int index = 0; |
| |
| // Whether the dropped item should be inserted before `index` or replace |
| // the tab at `index`. |
| enum class RelativeToIndex { kInsertBeforeIndex, kReplaceIndex }; |
| RelativeToIndex relative_to_index = RelativeToIndex::kReplaceIndex; |
| |
| // If `relative_to_index` is `kInsertBeforeIndex`, and `index` is the first |
| // tab in a tab group, determines whether to drop in the group or just |
| // before it. This disambiguates a drop before or after a group header. |
| enum class GroupInclusion { kIncludeInGroup, kDontIncludeInGroup }; |
| GroupInclusion group_inclusion = GroupInclusion::kDontIncludeInGroup; |
| |
| bool operator==(const DropIndex& other) const = default; |
| }; |
| |
| class DropTarget { |
| public: |
| DropTarget(const DropTarget&) = delete; |
| DropTarget& operator=(const DropTarget&) = delete; |
| |
| // Returns a `DropIndex` for the drop. If multiple items are being dropped, |
| // then `allow_replacement` will be false and the `relative_to_index` value |
| // of the returned `DropIndex` must not be set to `kReplaceIndex`. Return |
| // `nullopt` if it is not possible to drop at this location. |
| virtual std::optional<DropIndex> GetDropIndex( |
| const ui::DropTargetEvent& event, |
| bool allow_replacement) = 0; |
| virtual DropTarget* GetDropTarget(gfx::Point loc_in_local_coords) = 0; |
| virtual views::View* GetViewForDrop() = 0; |
| |
| virtual void HandleDragUpdate(const std::optional<DropIndex>& index) {} |
| virtual void HandleDragExited() {} |
| |
| protected: |
| DropTarget() = default; |
| virtual ~DropTarget() = default; |
| }; |
| |
| // You must call set_tabstrip before this class will accept drops. |
| BrowserRootView(BrowserView* browser_view, views::Widget* widget); |
| BrowserRootView(const BrowserRootView&) = delete; |
| BrowserRootView& operator=(const BrowserRootView&) = delete; |
| ~BrowserRootView() override; |
| |
| // views::View: |
| bool GetDropFormats(int* formats, |
| std::set<ui::ClipboardFormatType>* format_types) override; |
| bool AreDropTypesRequired() override; |
| bool CanDrop(const ui::OSExchangeData& data) override; |
| void OnDragEntered(const ui::DropTargetEvent& event) override; |
| int OnDragUpdated(const ui::DropTargetEvent& event) override; |
| void OnDragExited() override; |
| DropCallback GetDropCallback(const ui::DropTargetEvent& event) override; |
| bool OnMouseWheel(const ui::MouseWheelEvent& event) override; |
| void OnMouseExited(const ui::MouseEvent& event) override; |
| gfx::Size CalculatePreferredSize() const override; |
| |
| protected: |
| // views::View: |
| void PaintChildren(const views::PaintInfo& paint_info) override; |
| |
| private: |
| friend class BrowserRootViewBrowserTest; |
| FRIEND_TEST_ALL_PREFIXES(BrowserRootViewBrowserTest, ClearDropInfo); |
| |
| // Used during a drop session of a url. Tracks the position of the drop. |
| struct DropInfo { |
| DropInfo(); |
| ~DropInfo(); |
| |
| raw_ptr<DropTarget, DanglingUntriaged> target = nullptr; |
| |
| // Where to drop the urls. |
| std::optional<DropIndex> index; |
| |
| // The validated URLs for the drop event. |
| std::vector<GURL> urls; |
| |
| // An incrementing sequence number for `DropInfo`s. |
| int sequence = 0; |
| |
| // Set to true when the filtering of the URLs being dropped is complete. |
| bool filtering_complete = false; |
| }; |
| |
| // Converts `event` from the hosts coordinate system to the view's |
| // coordinate system, and gets the `DropIndex` for the drop. |
| // `allow_replacement` specifies whether `RelativeToIndex::kReplaceIndex` is a |
| // valid value for the returned `DropIndex::relative_to_index`. |
| std::optional<DropIndex> GetDropIndexForEvent( |
| const ui::DropTargetEvent& event, |
| const ui::OSExchangeData& data, |
| DropTarget* target, |
| bool allow_replacement); |
| |
| DropTarget* GetDropTarget(const ui::DropTargetEvent& event); |
| |
| // Called when the filtering for supported URLs is complete. |
| void OnFilteringComplete(int sequence, std::vector<GURL> urls); |
| |
| // Sets a callback for when URL filtering is complete. Be sure to wait for |
| // filtering to be complete before checking the drag operation returned by |
| // `OnDragUpdated()` or calling the drop callback in tests. |
| void SetOnFilteringCompleteClosureForTesting(base::OnceClosure closure); |
| |
| TabStrip* tabstrip() { return browser_view_->tabstrip(); } |
| ToolbarView* toolbar() { return browser_view_->toolbar(); } |
| |
| // Returns a URL if |data| has string contents and the user can "paste and |
| // go". |
| std::optional<GURL> GetPasteAndGoURL(const ui::OSExchangeData& data); |
| |
| // Navigates to the dropped URLs. |
| void NavigateToDroppedUrls( |
| std::unique_ptr<DropInfo> drop_info, |
| const ui::DropTargetEvent& event, |
| ui::mojom::DragOperation& output_drag_op, |
| std::unique_ptr<ui::LayerTreeOwner> drag_image_layer_owner); |
| |
| // The BrowserView. |
| raw_ptr<BrowserView, AcrossTasksDanglingUntriaged> browser_view_ = nullptr; |
| |
| // Used to calculate partial offsets in scrolls that occur for a smooth |
| // scroll device. |
| int scroll_remainder_x_ = 0; |
| int scroll_remainder_y_ = 0; |
| |
| std::unique_ptr<DropInfo> drop_info_; |
| |
| base::OnceClosure on_filtering_complete_closure_; |
| |
| base::WeakPtrFactory<BrowserRootView> weak_ptr_factory_{this}; |
| }; |
| |
| #endif // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_ROOT_VIEW_H_ |