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26 #ifndef FrameSelection_h
27 #define FrameSelection_h
29 #include "core/dom/Range.h"
30 #include "core/editing/Caret.h"
31 #include "core/editing/EditingStyle.h"
32 #include "core/editing/VisibleSelection.h"
33 #include "core/rendering/ScrollAlignment.h"
34 #include "platform/Timer.h"
35 #include "platform/geometry/IntRect.h"
36 #include "platform/geometry/LayoutRect.h"
37 #include "platform/heap/Handle.h"
38 #include "wtf/Noncopyable.h"
44 class GraphicsContext;
45 class HTMLFormElement;
47 class VisiblePosition;
49 enum EUserTriggered { NotUserTriggered = 0, UserTriggered = 1 };
51 enum RevealExtentOption {
56 class FrameSelection final : public NoBaseWillBeGarbageCollectedFinalized<FrameSelection>, public VisibleSelection::ChangeObserver, private CaretBase {
57 WTF_MAKE_NONCOPYABLE(FrameSelection);
58 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
59 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FrameSelection);
61 static PassOwnPtrWillBeRawPtr<FrameSelection> create(LocalFrame* frame = nullptr)
63 return adoptPtrWillBeNoop(new FrameSelection(frame));
65 virtual ~FrameSelection();
67 enum EAlteration { AlterationMove, AlterationExtend };
68 enum CursorAlignOnScroll { AlignCursorOnScrollIfNeeded,
69 AlignCursorOnScrollAlways };
70 enum SetSelectionOption {
71 // 1 << 0 is reserved for EUserTriggered
73 ClearTypingStyle = 1 << 2,
74 SpellCorrectionTriggered = 1 << 3,
75 DoNotSetFocus = 1 << 4,
76 DoNotUpdateAppearance = 1 << 5,
78 typedef unsigned SetSelectionOptions; // Union of values in SetSelectionOption and EUserTriggered
79 static inline EUserTriggered selectionOptionsToUserTriggered(SetSelectionOptions options)
81 return static_cast<EUserTriggered>(options & UserTriggered);
84 enum DirectoinalOption {
88 enum ResetCaretBlinkOption {
93 Element* rootEditableElement() const { return m_selection.rootEditableElement(); }
94 Element* rootEditableElementOrDocumentElement() const;
95 ContainerNode* rootEditableElementOrTreeScopeRootNode() const;
97 bool hasEditableStyle() const { return m_selection.hasEditableStyle(); }
98 bool isContentEditable() const { return m_selection.isContentEditable(); }
99 bool isContentRichlyEditable() const { return m_selection.isContentRichlyEditable(); }
101 void moveTo(const VisiblePosition&, EUserTriggered = NotUserTriggered, CursorAlignOnScroll = AlignCursorOnScrollIfNeeded);
102 void moveTo(const VisiblePosition&, const VisiblePosition&, EUserTriggered = NotUserTriggered);
103 void moveTo(const Position&, EAffinity, EUserTriggered = NotUserTriggered);
105 const VisibleSelection& selection() const { return m_selection; }
106 void setSelection(const VisibleSelection&, SetSelectionOptions = CloseTyping | ClearTypingStyle, CursorAlignOnScroll = AlignCursorOnScrollIfNeeded, TextGranularity = CharacterGranularity);
107 void setSelection(const VisibleSelection& selection, TextGranularity granularity) { setSelection(selection, CloseTyping | ClearTypingStyle, AlignCursorOnScrollIfNeeded, granularity); }
108 bool setSelectedRange(Range*, EAffinity, DirectoinalOption directional = NonDirectional, SetSelectionOptions = CloseTyping | ClearTypingStyle);
111 void prepareForDestruction();
113 // Call this after doing user-triggered selections to make it easy to delete the frame you entirely selected.
114 void selectFrameElementInParentIfFullySelected();
116 bool contains(const LayoutPoint&);
118 SelectionType selectionType() const { return m_selection.selectionType(); }
120 EAffinity affinity() const { return m_selection.affinity(); }
122 bool modify(EAlteration, SelectionDirection, TextGranularity, EUserTriggered = NotUserTriggered);
123 enum VerticalDirection { DirectionUp, DirectionDown };
124 bool modify(EAlteration, unsigned verticalDistance, VerticalDirection, EUserTriggered = NotUserTriggered, CursorAlignOnScroll = AlignCursorOnScrollIfNeeded);
126 TextGranularity granularity() const { return m_granularity; }
128 void setStart(const VisiblePosition &, EUserTriggered = NotUserTriggered);
129 void setEnd(const VisiblePosition &, EUserTriggered = NotUserTriggered);
131 void setBase(const VisiblePosition&, EUserTriggered = NotUserTriggered);
132 void setExtent(const VisiblePosition&, EUserTriggered = NotUserTriggered);
134 Position base() const { return m_selection.base(); }
135 Position extent() const { return m_selection.extent(); }
136 Position start() const { return m_selection.start(); }
137 Position end() const { return m_selection.end(); }
139 // Return the renderer that is responsible for painting the caret (in the selection start node)
140 RenderBlock* caretRenderer() const;
142 // Bounds of (possibly transformed) caret in absolute coords
143 IntRect absoluteCaretBounds();
145 void didChangeFocus();
146 void willBeModified(EAlteration, SelectionDirection);
148 bool isNone() const { return m_selection.isNone(); }
149 bool isCaret() const { return m_selection.isCaret(); }
150 bool isRange() const { return m_selection.isRange(); }
151 bool isCaretOrRange() const { return m_selection.isCaretOrRange(); }
152 bool isInPasswordField() const;
153 bool isDirectional() const { return m_selection.isDirectional(); }
155 // If this FrameSelection has a logical range which is still valid, this function return its clone. Otherwise,
156 // the return value from underlying VisibleSelection's firstRange() is returned.
157 PassRefPtrWillBeRawPtr<Range> firstRange() const;
159 PassRefPtrWillBeRawPtr<Range> toNormalizedRange() const { return m_selection.toNormalizedRange(); }
161 void nodeWillBeRemoved(Node&);
162 void didUpdateCharacterData(CharacterData*, unsigned offset, unsigned oldLength, unsigned newLength);
163 void didMergeTextNodes(const Text& oldNode, unsigned offset);
164 void didSplitTextNode(const Text& oldNode);
166 void updateAppearance(ResetCaretBlinkOption = None);
167 void setCaretVisible(bool caretIsVisible) { setCaretVisibility(caretIsVisible ? Visible : Hidden); }
168 bool isCaretBoundsDirty() const { return m_caretRectDirty; }
169 void setCaretRectNeedsUpdate();
170 void scheduleVisualUpdate() const;
171 void invalidateCaretRect();
172 void paintCaret(GraphicsContext*, const LayoutPoint&, const LayoutRect& clipRect);
173 bool ShouldPaintCaretForTesting() const { return m_shouldPaintCaret; }
175 // Used to suspend caret blinking while the mouse is down.
176 void setCaretBlinkingSuspended(bool suspended) { m_isCaretBlinkingSuspended = suspended; }
177 bool isCaretBlinkingSuspended() const { return m_isCaretBlinkingSuspended; }
180 void setFocused(bool);
181 bool isFocused() const { return m_focused; }
182 bool isFocusedAndActive() const;
183 void pageActivationChanged();
185 void updateSecureKeyboardEntryIfActive();
187 // Returns true if a word is selected.
188 bool selectWordAroundPosition(const VisiblePosition&);
191 void formatForDebugger(char* buffer, unsigned length) const;
192 void showTreeForThis() const;
195 enum EndPointsAdjustmentMode { AdjustEndpointsAtBidiBoundary, DoNotAdjsutEndpoints };
196 void setNonDirectionalSelectionIfNeeded(const VisibleSelection&, TextGranularity, EndPointsAdjustmentMode = DoNotAdjsutEndpoints);
197 void setFocusedNodeIfNeeded();
198 void notifyRendererOfSelectionChange(EUserTriggered);
200 EditingStyle* typingStyle() const;
201 void setTypingStyle(PassRefPtrWillBeRawPtr<EditingStyle>);
202 void clearTypingStyle();
204 String selectedText() const;
205 String selectedTextForClipboard() const;
207 // The bounds are clipped to the viewport as this is what callers expect.
208 LayoutRect bounds() const;
209 LayoutRect unclippedBounds() const;
211 HTMLFormElement* currentForm() const;
213 void revealSelection(const ScrollAlignment& = ScrollAlignment::alignCenterIfNeeded, RevealExtentOption = DoNotRevealExtent);
214 void setSelectionFromNone();
216 void setShouldShowBlockCursor(bool);
218 // VisibleSelection::ChangeObserver interface.
219 virtual void didChangeVisibleSelection() override;
221 virtual void trace(Visitor*) override;
224 explicit FrameSelection(LocalFrame*);
226 enum EPositionType { START, END, BASE, EXTENT };
228 void respondToNodeModification(Node&, bool baseRemoved, bool extentRemoved, bool startRemoved, bool endRemoved);
229 TextDirection directionOfEnclosingBlock();
230 TextDirection directionOfSelection();
232 VisiblePosition positionForPlatform(bool isGetStart) const;
233 VisiblePosition startForPlatform() const;
234 VisiblePosition endForPlatform() const;
235 VisiblePosition nextWordPositionForPlatform(const VisiblePosition&);
237 VisiblePosition modifyExtendingRight(TextGranularity);
238 VisiblePosition modifyExtendingForward(TextGranularity);
239 VisiblePosition modifyMovingRight(TextGranularity);
240 VisiblePosition modifyMovingForward(TextGranularity);
241 VisiblePosition modifyExtendingLeft(TextGranularity);
242 VisiblePosition modifyExtendingBackward(TextGranularity);
243 VisiblePosition modifyMovingLeft(TextGranularity);
244 VisiblePosition modifyMovingBackward(TextGranularity);
246 LayoutUnit lineDirectionPointForBlockDirectionNavigation(EPositionType);
248 void notifyAccessibilityForSelectionChange();
249 void notifyCompositorForSelectionChange();
250 void notifyEventHandlerForSelectionChange();
252 void focusedOrActiveStateChanged();
254 void caretBlinkTimerFired(Timer<FrameSelection>*);
256 void setUseSecureKeyboardEntry(bool);
258 void setCaretVisibility(CaretVisibility);
259 bool shouldBlinkCaret() const;
261 bool dispatchSelectStart();
263 void updateSelectionIfNeeded(const Position& base, const Position& extent, const Position& start, const Position& end);
265 void startObservingVisibleSelectionChange();
266 void stopObservingVisibleSelectionChangeIfNecessary();
268 VisibleSelection validateSelection(const VisibleSelection&);
270 RawPtrWillBeMember<LocalFrame> m_frame;
272 LayoutUnit m_xPosForVerticalArrowNavigation;
274 VisibleSelection m_selection;
275 bool m_observingVisibleSelection;
276 VisiblePosition m_originalBase; // Used to store base before the adjustment at bidi boundary
277 TextGranularity m_granularity;
279 // The range specified by the user, which may not be visually canonicalized (hence "logical").
280 // This will be invalidated if the underlying VisibleSelection changes. If that happens, this variable will
281 // become null, in which case logical positions == visible positions.
282 RefPtrWillBeMember<Range> m_logicalRange;
284 RefPtrWillBeMember<Node> m_previousCaretNode; // The last node which painted the caret. Retained for clearing the old caret when it moves.
285 LayoutRect m_previousCaretRect;
287 RefPtrWillBeMember<EditingStyle> m_typingStyle;
289 Timer<FrameSelection> m_caretBlinkTimer;
291 bool m_caretRectDirty : 1;
292 bool m_shouldPaintCaret : 1;
293 bool m_isCaretBlinkingSuspended : 1;
295 bool m_shouldShowBlockCursor : 1;
298 inline EditingStyle* FrameSelection::typingStyle() const
300 return m_typingStyle.get();
303 inline void FrameSelection::clearTypingStyle()
305 m_typingStyle.clear();
308 inline void FrameSelection::setTypingStyle(PassRefPtrWillBeRawPtr<EditingStyle> style)
310 m_typingStyle = style;
315 // Outside the WebCore namespace for ease of invocation from gdb.
316 void showTree(const blink::FrameSelection&);
317 void showTree(const blink::FrameSelection*);
320 #endif // FrameSelection_h