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27 #include "core/editing/Caret.h"
29 #include "core/dom/Document.h"
30 #include "core/editing/VisibleUnits.h"
31 #include "core/editing/htmlediting.h"
32 #include "core/frame/LocalFrame.h"
33 #include "core/frame/Settings.h"
34 #include "core/html/HTMLTextFormControlElement.h"
35 #include "core/rendering/RenderBlock.h"
36 #include "core/rendering/RenderView.h"
37 #include "platform/graphics/GraphicsContext.h"
41 CaretBase::CaretBase(CaretVisibility visibility)
42 : m_caretRectNeedsUpdate(true)
43 , m_caretVisibility(visibility)
47 DragCaretController::DragCaretController()
52 PassOwnPtrWillBeRawPtr<DragCaretController> DragCaretController::create()
54 return adoptPtrWillBeNoop(new DragCaretController);
57 bool DragCaretController::isContentRichlyEditable() const
59 return isRichlyEditablePosition(m_position.deepEquivalent());
62 void DragCaretController::setCaretPosition(const VisiblePosition& position)
64 if (Node* node = m_position.deepEquivalent().deprecatedNode())
65 invalidateCaretRect(node);
66 m_position = position;
67 setCaretRectNeedsUpdate();
68 Document* document = 0;
69 if (Node* node = m_position.deepEquivalent().deprecatedNode()) {
70 invalidateCaretRect(node);
71 document = &node->document();
73 if (m_position.isNull() || m_position.isOrphan()) {
76 document->updateRenderTreeIfNeeded();
77 updateCaretRect(document, m_position);
81 static bool removingNodeRemovesPosition(Node& node, const Position& position)
83 if (!position.anchorNode())
86 if (position.anchorNode() == node)
89 if (!node.isElementNode())
92 Element& element = toElement(node);
93 return element.containsIncludingShadowDOM(position.anchorNode());
96 void DragCaretController::nodeWillBeRemoved(Node& node)
98 if (!hasCaret() || !node.inActiveDocument())
101 if (!removingNodeRemovesPosition(node, m_position.deepEquivalent()))
104 m_position.deepEquivalent().document()->renderView()->clearSelection();
108 void DragCaretController::trace(Visitor* visitor)
110 visitor->trace(m_position);
113 void CaretBase::clearCaretRect()
115 m_caretLocalRect = LayoutRect();
118 static inline bool caretRendersInsideNode(Node* node)
120 return node && !isRenderedTableElement(node) && !editingIgnoresContent(node);
123 RenderBlock* CaretBase::caretRenderer(Node* node)
128 RenderObject* renderer = node->renderer();
132 // if caretNode is a block and caret is inside it then caret should be painted by that block
133 bool paintedByBlock = renderer->isRenderBlock() && caretRendersInsideNode(node);
134 return paintedByBlock ? toRenderBlock(renderer) : renderer->containingBlock();
137 static void mapCaretRectToCaretPainter(RenderObject* caretRenderer, RenderBlock* caretPainter, LayoutRect& caretRect)
139 // FIXME: This shouldn't be called on un-rooted subtrees.
140 // FIXME: This should probably just use mapLocalToContainer.
141 // Compute an offset between the caretRenderer and the caretPainter.
143 ASSERT(caretRenderer->isDescendantOf(caretPainter));
145 bool unrooted = false;
146 while (caretRenderer != caretPainter) {
147 RenderObject* containerObject = caretRenderer->container();
148 if (!containerObject) {
152 caretRect.move(caretRenderer->offsetFromContainer(containerObject, caretRect.location()));
153 caretRenderer = containerObject;
157 caretRect = LayoutRect();
160 bool CaretBase::updateCaretRect(Document* document, const PositionWithAffinity& caretPosition)
162 m_caretLocalRect = LayoutRect();
164 m_caretRectNeedsUpdate = false;
166 if (caretPosition.position().isNull())
169 ASSERT(caretPosition.position().deprecatedNode()->renderer());
171 // First compute a rect local to the renderer at the selection start.
172 RenderObject* renderer;
173 m_caretLocalRect = localCaretRectOfPosition(caretPosition, renderer);
175 // Get the renderer that will be responsible for painting the caret
176 // (which is either the renderer we just found, or one of its containers).
177 RenderBlock* caretPainter = caretRenderer(caretPosition.position().deprecatedNode());
179 mapCaretRectToCaretPainter(renderer, caretPainter, m_caretLocalRect);
184 bool CaretBase::updateCaretRect(Document* document, const VisiblePosition& caretPosition)
186 return updateCaretRect(document, PositionWithAffinity(caretPosition.deepEquivalent(), caretPosition.affinity()));
189 RenderBlock* DragCaretController::caretRenderer() const
191 return CaretBase::caretRenderer(m_position.deepEquivalent().deprecatedNode());
194 IntRect CaretBase::absoluteBoundsForLocalRect(Node* node, const LayoutRect& rect) const
196 RenderBlock* caretPainter = caretRenderer(node);
200 LayoutRect localRect(rect);
201 caretPainter->flipForWritingMode(localRect);
202 return caretPainter->localToAbsoluteQuad(FloatRect(localRect)).enclosingBoundingBox();
205 void CaretBase::invalidateLocalCaretRect(Node* node, const LayoutRect& rect)
207 RenderBlock* caretPainter = caretRenderer(node);
211 // FIXME: Need to over-paint 1 pixel to workaround some rounding problems.
212 // https://bugs.webkit.org/show_bug.cgi?id=108283
213 LayoutRect inflatedRect = rect;
214 inflatedRect.inflate(1);
216 // FIXME: We should use mapLocalToContainer() since we know we're not un-rooted.
217 mapCaretRectToCaretPainter(node->renderer(), caretPainter, inflatedRect);
219 caretPainter->invalidatePaintRectangle(inflatedRect);
222 bool CaretBase::shouldRepaintCaret(const RenderView* view, bool isContentEditable) const
225 bool caretBrowsing = false;
226 if (FrameView* frameView = view->frameView()) {
227 LocalFrame& frame = frameView->frame(); // The frame where the selection started
228 caretBrowsing = frame.settings() && frame.settings()->caretBrowsingEnabled();
230 return (caretBrowsing || isContentEditable);
233 void CaretBase::invalidateCaretRect(Node* node, bool caretRectChanged)
235 // EDIT FIXME: This is an unfortunate hack.
236 // Basically, we can't trust this layout position since we
237 // can't guarantee that the check to see if we are in unrendered
238 // content will work at this point. We may have to wait for
239 // a layout and re-render of the document to happen. So, resetting this
240 // flag will cause another caret layout to happen the first time
241 // that we try to paint the caret after this call. That one will work since
242 // it happens after the document has accounted for any editing
243 // changes which may have been done.
244 // And, we need to leave this layout here so the caret moves right
245 // away after clicking.
246 m_caretRectNeedsUpdate = true;
248 if (caretRectChanged)
251 if (RenderView* view = node->document().renderView()) {
252 if (shouldRepaintCaret(view, node->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable)))
253 invalidateLocalCaretRect(node, localCaretRectWithoutUpdate());
257 void CaretBase::paintCaret(Node* node, GraphicsContext* context, const LayoutPoint& paintOffset, const LayoutRect& clipRect) const
259 if (m_caretVisibility == Hidden)
262 LayoutRect drawingRect = localCaretRectWithoutUpdate();
263 if (RenderBlock* renderer = caretRenderer(node))
264 renderer->flipForWritingMode(drawingRect);
265 drawingRect.moveBy(roundedIntPoint(paintOffset));
266 LayoutRect caret = intersection(drawingRect, clipRect);
270 Color caretColor = Color::black;
273 if (node->isElementNode())
274 element = toElement(node);
276 element = node->parentElement();
278 if (element && element->renderer())
279 caretColor = element->renderer()->resolveColor(CSSPropertyColor);
281 context->fillRect(caret, caretColor);
284 void DragCaretController::paintDragCaret(LocalFrame* frame, GraphicsContext* p, const LayoutPoint& paintOffset, const LayoutRect& clipRect) const
286 if (m_position.deepEquivalent().deprecatedNode()->document().frame() == frame)
287 paintCaret(m_position.deepEquivalent().deprecatedNode(), p, paintOffset, clipRect);