| /* |
| * Copyright (C) 2004 Apple Computer, 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: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "config.h" |
| #include "SelectionController.h" |
| |
| #include "DeleteSelectionCommand.h" |
| #include "Document.h" |
| #include "Editor.h" |
| #include "Element.h" |
| #include "EventHandler.h" |
| #include "EventNames.h" |
| #include "ExceptionCode.h" |
| #include "FocusController.h" |
| #include "Frame.h" |
| #include "FrameTree.h" |
| #include "FrameView.h" |
| #include "GraphicsContext.h" |
| #include "HTMLInputElement.h" |
| #include "HTMLNames.h" |
| #include "HitTestRequest.h" |
| #include "HitTestResult.h" |
| #include "Page.h" |
| #include "Range.h" |
| #include "RenderTheme.h" |
| #include "RenderView.h" |
| #include "TextIterator.h" |
| #include "TypingCommand.h" |
| #include "htmlediting.h" |
| #include "visible_units.h" |
| |
| #define EDIT_DEBUG 0 |
| |
| namespace WebCore { |
| |
| using namespace EventNames; |
| using namespace HTMLNames; |
| |
| const int NoXPosForVerticalArrowNavigation = INT_MIN; |
| |
| SelectionController::SelectionController(Frame* frame, bool isDragCaretController) |
| : m_needsLayout(true) |
| , m_lastChangeWasHorizontalExtension(false) |
| , m_frame(frame) |
| , m_isDragCaretController(isDragCaretController) |
| , m_isCaretBlinkingSuspended(false) |
| , m_xPosForVerticalArrowNavigation(NoXPosForVerticalArrowNavigation) |
| , m_focused(false) |
| { |
| } |
| |
| void SelectionController::moveTo(const VisiblePosition &pos, bool userTriggered) |
| { |
| setSelection(Selection(pos.deepEquivalent(), pos.deepEquivalent(), pos.affinity()), true, true, userTriggered); |
| } |
| |
| void SelectionController::moveTo(const VisiblePosition &base, const VisiblePosition &extent, bool userTriggered) |
| { |
| setSelection(Selection(base.deepEquivalent(), extent.deepEquivalent(), base.affinity()), true, true, userTriggered); |
| } |
| |
| void SelectionController::moveTo(const Position &pos, EAffinity affinity, bool userTriggered) |
| { |
| setSelection(Selection(pos, affinity), true, true, userTriggered); |
| } |
| |
| void SelectionController::moveTo(const Range *r, EAffinity affinity, bool userTriggered) |
| { |
| setSelection(Selection(startPosition(r), endPosition(r), affinity), true, true, userTriggered); |
| } |
| |
| void SelectionController::moveTo(const Position &base, const Position &extent, EAffinity affinity, bool userTriggered) |
| { |
| setSelection(Selection(base, extent, affinity), true, true, userTriggered); |
| } |
| |
| void SelectionController::setSelection(const Selection& s, bool closeTyping, bool clearTypingStyle, bool userTriggered) |
| { |
| if (m_isDragCaretController) { |
| invalidateCaretRect(); |
| m_sel = s; |
| m_needsLayout = true; |
| invalidateCaretRect(); |
| return; |
| } |
| if (!m_frame) { |
| m_sel = s; |
| return; |
| } |
| |
| if (s.base().node() && s.base().node()->document() != m_frame->document()) { |
| s.base().node()->document()->frame()->selectionController()->setSelection(s, closeTyping, clearTypingStyle, userTriggered); |
| return; |
| } |
| |
| if (closeTyping) |
| TypingCommand::closeTyping(m_frame->editor()->lastEditCommand()); |
| |
| if (clearTypingStyle) { |
| m_frame->clearTypingStyle(); |
| m_frame->editor()->setRemovedAnchor(0); |
| } |
| |
| if (m_sel == s) |
| return; |
| |
| Selection oldSelection = m_sel; |
| |
| m_sel = s; |
| |
| m_needsLayout = true; |
| |
| if (!s.isNone()) |
| m_frame->setFocusedNodeIfNeeded(); |
| |
| m_frame->selectionLayoutChanged(); |
| // Always clear the x position used for vertical arrow navigation. |
| // It will be restored by the vertical arrow navigation code if necessary. |
| m_xPosForVerticalArrowNavigation = NoXPosForVerticalArrowNavigation; |
| selectFrameElementInParentIfFullySelected(); |
| m_frame->notifyRendererOfSelectionChange(userTriggered); |
| m_frame->respondToChangedSelection(oldSelection, closeTyping); |
| if (userTriggered) |
| m_frame->revealCaret(RenderLayer::gAlignToEdgeIfNeeded); |
| |
| notifyAccessibilityForSelectionChange(); |
| } |
| |
| static bool removingNodeRemovesPosition(Node* node, const Position& position) |
| { |
| if (!position.node()) |
| return false; |
| |
| if (position.node() == node) |
| return true; |
| |
| if (!node->isElementNode()) |
| return false; |
| |
| Element* element = static_cast<Element*>(node); |
| return element->contains(position.node()) || element->contains(position.node()->shadowAncestorNode()); |
| } |
| |
| void SelectionController::nodeWillBeRemoved(Node *node) |
| { |
| if (isNone()) |
| return; |
| |
| // There can't be a selection inside a fragment, so if a fragment's node is being removed, |
| // the selection in the document that created the fragment needs no adjustment. |
| if (node && highestAncestor(node)->nodeType() == Node::DOCUMENT_FRAGMENT_NODE) |
| return; |
| |
| bool baseRemoved = removingNodeRemovesPosition(node, m_sel.base()); |
| bool extentRemoved = removingNodeRemovesPosition(node, m_sel.extent()); |
| bool startRemoved = removingNodeRemovesPosition(node, m_sel.start()); |
| bool endRemoved = removingNodeRemovesPosition(node, m_sel.end()); |
| |
| bool clearRenderTreeSelection = false; |
| bool clearDOMTreeSelection = false; |
| |
| if (startRemoved || endRemoved) { |
| // FIXME: When endpoints are removed, we should just alter the selection, instead of blowing it away. |
| clearRenderTreeSelection = true; |
| clearDOMTreeSelection = true; |
| } else if (baseRemoved || extentRemoved) { |
| if (m_sel.isBaseFirst()) { |
| m_sel.setBase(m_sel.start()); |
| m_sel.setExtent(m_sel.end()); |
| } else { |
| m_sel.setBase(m_sel.start()); |
| m_sel.setExtent(m_sel.end()); |
| } |
| // FIXME: This could be more efficient if we had an isNodeInRange function on Ranges. |
| } else if (Range::compareBoundaryPoints(m_sel.start(), Position(node, 0)) == -1 && |
| Range::compareBoundaryPoints(m_sel.end(), Position(node, 0)) == 1) { |
| // If we did nothing here, when this node's renderer was destroyed, the rect that it |
| // occupied would be invalidated, but, selection gaps that change as a result of |
| // the removal wouldn't be invalidated. |
| // FIXME: Don't do so much unnecessary invalidation. |
| clearRenderTreeSelection = true; |
| } |
| |
| if (clearRenderTreeSelection) { |
| RefPtr<Document> document = m_sel.start().node()->document(); |
| document->updateRendering(); |
| if (RenderView* view = static_cast<RenderView*>(document->renderer())) |
| view->clearSelection(); |
| } |
| |
| if (clearDOMTreeSelection) |
| setSelection(Selection(), false, false); |
| } |
| |
| void SelectionController::willBeModified(EAlteration alter, EDirection direction) |
| { |
| switch (alter) { |
| case MOVE: |
| m_lastChangeWasHorizontalExtension = false; |
| break; |
| case EXTEND: |
| if (!m_lastChangeWasHorizontalExtension) { |
| m_lastChangeWasHorizontalExtension = true; |
| Position start = m_sel.start(); |
| Position end = m_sel.end(); |
| switch (direction) { |
| // FIXME: right for bidi? |
| case RIGHT: |
| case FORWARD: |
| m_sel.setBase(start); |
| m_sel.setExtent(end); |
| break; |
| case LEFT: |
| case BACKWARD: |
| m_sel.setBase(end); |
| m_sel.setExtent(start); |
| break; |
| } |
| } |
| break; |
| } |
| } |
| |
| VisiblePosition SelectionController::modifyExtendingRightForward(TextGranularity granularity) |
| { |
| VisiblePosition pos(m_sel.extent(), m_sel.affinity()); |
| switch (granularity) { |
| case CharacterGranularity: |
| pos = pos.next(true); |
| break; |
| case WordGranularity: |
| pos = nextWordPosition(pos); |
| break; |
| case SentenceGranularity: |
| pos = nextSentencePosition(pos); |
| break; |
| case LineGranularity: |
| pos = nextLinePosition(pos, xPosForVerticalArrowNavigation(EXTENT)); |
| break; |
| case ParagraphGranularity: |
| pos = nextParagraphPosition(pos, xPosForVerticalArrowNavigation(EXTENT)); |
| break; |
| case SentenceBoundary: |
| pos = endOfSentence(VisiblePosition(m_sel.end(), m_sel.affinity())); |
| break; |
| case LineBoundary: |
| pos = endOfLine(VisiblePosition(m_sel.end(), m_sel.affinity())); |
| break; |
| case ParagraphBoundary: |
| pos = endOfParagraph(VisiblePosition(m_sel.end(), m_sel.affinity())); |
| break; |
| case DocumentBoundary: |
| pos = VisiblePosition(m_sel.end(), m_sel.affinity()); |
| if (isEditablePosition(pos.deepEquivalent())) |
| pos = endOfEditableContent(pos); |
| else |
| pos = endOfDocument(pos); |
| break; |
| } |
| |
| return pos; |
| } |
| |
| VisiblePosition SelectionController::modifyMovingRightForward(TextGranularity granularity) |
| { |
| VisiblePosition pos; |
| // FIXME: Stay in editable content for the less common granularities. |
| switch (granularity) { |
| case CharacterGranularity: |
| if (isRange()) |
| pos = VisiblePosition(m_sel.end(), m_sel.affinity()); |
| else |
| pos = VisiblePosition(m_sel.extent(), m_sel.affinity()).next(true); |
| break; |
| case WordGranularity: |
| pos = nextWordPosition(VisiblePosition(m_sel.extent(), m_sel.affinity())); |
| break; |
| case SentenceGranularity: |
| pos = nextSentencePosition(VisiblePosition(m_sel.extent(), m_sel.affinity())); |
| break; |
| case LineGranularity: { |
| // down-arrowing from a range selection that ends at the start of a line needs |
| // to leave the selection at that line start (no need to call nextLinePosition!) |
| pos = VisiblePosition(m_sel.end(), m_sel.affinity()); |
| if (!isRange() || !isStartOfLine(pos)) |
| pos = nextLinePosition(pos, xPosForVerticalArrowNavigation(START)); |
| break; |
| } |
| case ParagraphGranularity: |
| pos = nextParagraphPosition(VisiblePosition(m_sel.end(), m_sel.affinity()), xPosForVerticalArrowNavigation(START)); |
| break; |
| case SentenceBoundary: |
| pos = endOfSentence(VisiblePosition(m_sel.end(), m_sel.affinity())); |
| break; |
| case LineBoundary: |
| pos = endOfLine(VisiblePosition(m_sel.end(), m_sel.affinity())); |
| break; |
| case ParagraphBoundary: |
| pos = endOfParagraph(VisiblePosition(m_sel.end(), m_sel.affinity())); |
| break; |
| case DocumentBoundary: |
| pos = VisiblePosition(m_sel.end(), m_sel.affinity()); |
| if (isEditablePosition(pos.deepEquivalent())) |
| pos = endOfEditableContent(pos); |
| else |
| pos = endOfDocument(pos); |
| break; |
| |
| } |
| return pos; |
| } |
| |
| VisiblePosition SelectionController::modifyExtendingLeftBackward(TextGranularity granularity) |
| { |
| VisiblePosition pos(m_sel.extent(), m_sel.affinity()); |
| |
| // Extending a selection backward by word or character from just after a table selects |
| // the table. This "makes sense" from the user perspective, esp. when deleting. |
| // It was done here instead of in VisiblePosition because we want VPs to iterate |
| // over everything. |
| switch (granularity) { |
| case CharacterGranularity: |
| pos = pos.previous(true); |
| break; |
| case WordGranularity: |
| pos = previousWordPosition(pos); |
| break; |
| case SentenceGranularity: |
| pos = previousSentencePosition(pos); |
| break; |
| case LineGranularity: |
| pos = previousLinePosition(pos, xPosForVerticalArrowNavigation(EXTENT)); |
| break; |
| case ParagraphGranularity: |
| pos = previousParagraphPosition(pos, xPosForVerticalArrowNavigation(EXTENT)); |
| break; |
| case SentenceBoundary: |
| pos = startOfSentence(VisiblePosition(m_sel.start(), m_sel.affinity())); |
| break; |
| case LineBoundary: |
| pos = startOfLine(VisiblePosition(m_sel.start(), m_sel.affinity())); |
| break; |
| case ParagraphBoundary: |
| pos = startOfParagraph(VisiblePosition(m_sel.start(), m_sel.affinity())); |
| break; |
| case DocumentBoundary: |
| pos = VisiblePosition(m_sel.start(), m_sel.affinity()); |
| if (isEditablePosition(pos.deepEquivalent())) |
| pos = startOfEditableContent(pos); |
| else |
| pos = startOfDocument(pos); |
| break; |
| } |
| return pos; |
| } |
| |
| VisiblePosition SelectionController::modifyMovingLeftBackward(TextGranularity granularity) |
| { |
| VisiblePosition pos; |
| switch (granularity) { |
| case CharacterGranularity: |
| if (isRange()) |
| pos = VisiblePosition(m_sel.start(), m_sel.affinity()); |
| else |
| pos = VisiblePosition(m_sel.extent(), m_sel.affinity()).previous(true); |
| break; |
| case WordGranularity: |
| pos = previousWordPosition(VisiblePosition(m_sel.extent(), m_sel.affinity())); |
| break; |
| case SentenceGranularity: |
| pos = previousSentencePosition(VisiblePosition(m_sel.extent(), m_sel.affinity())); |
| break; |
| case LineGranularity: |
| pos = previousLinePosition(VisiblePosition(m_sel.start(), m_sel.affinity()), xPosForVerticalArrowNavigation(START)); |
| break; |
| case ParagraphGranularity: |
| pos = previousParagraphPosition(VisiblePosition(m_sel.start(), m_sel.affinity()), xPosForVerticalArrowNavigation(START)); |
| break; |
| case SentenceBoundary: |
| pos = startOfSentence(VisiblePosition(m_sel.start(), m_sel.affinity())); |
| break; |
| case LineBoundary: |
| pos = startOfLine(VisiblePosition(m_sel.start(), m_sel.affinity())); |
| break; |
| case ParagraphBoundary: |
| pos = startOfParagraph(VisiblePosition(m_sel.start(), m_sel.affinity())); |
| break; |
| case DocumentBoundary: |
| pos = VisiblePosition(m_sel.start(), m_sel.affinity()); |
| if (isEditablePosition(pos.deepEquivalent())) |
| pos = startOfEditableContent(pos); |
| else |
| pos = startOfDocument(pos); |
| break; |
| } |
| return pos; |
| } |
| |
| bool SelectionController::modify(EAlteration alter, EDirection dir, TextGranularity granularity, bool userTriggered) |
| { |
| if (userTriggered) { |
| SelectionController trialSelectionController; |
| trialSelectionController.setLastChangeWasHorizontalExtension(m_lastChangeWasHorizontalExtension); |
| trialSelectionController.setSelection(m_sel); |
| trialSelectionController.modify(alter, dir, granularity, false); |
| |
| bool change = m_frame->shouldChangeSelection(trialSelectionController.selection()); |
| if (!change) |
| return false; |
| } |
| |
| if (m_frame) |
| m_frame->setSelectionGranularity(granularity); |
| |
| willBeModified(alter, dir); |
| |
| VisiblePosition pos; |
| switch (dir) { |
| // EDIT FIXME: These need to handle bidi |
| case RIGHT: |
| case FORWARD: |
| if (alter == EXTEND) |
| pos = modifyExtendingRightForward(granularity); |
| else |
| pos = modifyMovingRightForward(granularity); |
| break; |
| case LEFT: |
| case BACKWARD: |
| if (alter == EXTEND) |
| pos = modifyExtendingLeftBackward(granularity); |
| else |
| pos = modifyMovingLeftBackward(granularity); |
| break; |
| } |
| |
| if (pos.isNull()) |
| return false; |
| |
| // Some of the above operations set an xPosForVerticalArrowNavigation. |
| // Setting a selection will clear it, so save it to possibly restore later. |
| // Note: the START position type is arbitrary because it is unused, it would be |
| // the requested position type if there were no xPosForVerticalArrowNavigation set. |
| int x = xPosForVerticalArrowNavigation(START); |
| |
| switch (alter) { |
| case MOVE: |
| moveTo(pos, userTriggered); |
| break; |
| case EXTEND: |
| setExtent(pos, userTriggered); |
| break; |
| } |
| |
| if (granularity == LineGranularity || granularity == ParagraphGranularity) |
| m_xPosForVerticalArrowNavigation = x; |
| |
| if (userTriggered) { |
| // User modified selection change also sets the granularity back to character. |
| // NOTE: The one exception is that we need to keep word granularity to |
| // preserve smart delete behavior when extending by word (e.g. double-click), |
| // then shift-option-right arrow, then delete needs to smart delete, per TextEdit. |
| if (!(alter == EXTEND && granularity == WordGranularity && m_frame->selectionGranularity() == WordGranularity)) |
| m_frame->setSelectionGranularity(CharacterGranularity); |
| } |
| |
| setNeedsLayout(); |
| |
| return true; |
| } |
| |
| // FIXME: Maybe baseline would be better? |
| static bool caretY(const VisiblePosition &c, int &y) |
| { |
| Position p = c.deepEquivalent(); |
| Node *n = p.node(); |
| if (!n) |
| return false; |
| RenderObject *r = p.node()->renderer(); |
| if (!r) |
| return false; |
| IntRect rect = r->caretRect(p.offset()); |
| if (rect.isEmpty()) |
| return false; |
| y = rect.y() + rect.height() / 2; |
| return true; |
| } |
| |
| bool SelectionController::modify(EAlteration alter, int verticalDistance, bool userTriggered) |
| { |
| if (verticalDistance == 0) |
| return false; |
| |
| if (userTriggered) { |
| SelectionController trialSelectionController; |
| trialSelectionController.setSelection(m_sel); |
| trialSelectionController.modify(alter, verticalDistance, false); |
| |
| bool change = m_frame->shouldChangeSelection(trialSelectionController.selection()); |
| if (!change) |
| return false; |
| } |
| |
| bool up = verticalDistance < 0; |
| if (up) |
| verticalDistance = -verticalDistance; |
| |
| willBeModified(alter, up ? BACKWARD : FORWARD); |
| |
| VisiblePosition pos; |
| int xPos = 0; |
| switch (alter) { |
| case MOVE: |
| pos = VisiblePosition(up ? m_sel.start() : m_sel.end(), m_sel.affinity()); |
| xPos = xPosForVerticalArrowNavigation(up ? START : END); |
| m_sel.setAffinity(up ? UPSTREAM : DOWNSTREAM); |
| break; |
| case EXTEND: |
| pos = VisiblePosition(m_sel.extent(), m_sel.affinity()); |
| xPos = xPosForVerticalArrowNavigation(EXTENT); |
| m_sel.setAffinity(DOWNSTREAM); |
| break; |
| } |
| |
| int startY; |
| if (!caretY(pos, startY)) |
| return false; |
| if (up) |
| startY = -startY; |
| int lastY = startY; |
| |
| VisiblePosition result; |
| VisiblePosition next; |
| for (VisiblePosition p = pos; ; p = next) { |
| next = (up ? previousLinePosition : nextLinePosition)(p, xPos); |
| if (next.isNull() || next == p) |
| break; |
| int nextY; |
| if (!caretY(next, nextY)) |
| break; |
| if (up) |
| nextY = -nextY; |
| if (nextY - startY > verticalDistance) |
| break; |
| if (nextY >= lastY) { |
| lastY = nextY; |
| result = next; |
| } |
| } |
| |
| if (result.isNull()) |
| return false; |
| |
| switch (alter) { |
| case MOVE: |
| moveTo(result, userTriggered); |
| break; |
| case EXTEND: |
| setExtent(result, userTriggered); |
| break; |
| } |
| |
| if (userTriggered) |
| m_frame->setSelectionGranularity(CharacterGranularity); |
| |
| return true; |
| } |
| |
| bool SelectionController::expandUsingGranularity(TextGranularity granularity) |
| { |
| if (isNone()) |
| return false; |
| |
| m_sel.expandUsingGranularity(granularity); |
| m_needsLayout = true; |
| return true; |
| } |
| |
| int SelectionController::xPosForVerticalArrowNavigation(EPositionType type) |
| { |
| int x = 0; |
| |
| if (isNone()) |
| return x; |
| |
| Position pos; |
| switch (type) { |
| case START: |
| pos = m_sel.start(); |
| break; |
| case END: |
| pos = m_sel.end(); |
| break; |
| case BASE: |
| pos = m_sel.base(); |
| break; |
| case EXTENT: |
| pos = m_sel.extent(); |
| break; |
| } |
| |
| Frame *frame = pos.node()->document()->frame(); |
| if (!frame) |
| return x; |
| |
| if (m_xPosForVerticalArrowNavigation == NoXPosForVerticalArrowNavigation) { |
| pos = VisiblePosition(pos, m_sel.affinity()).deepEquivalent(); |
| // VisiblePosition creation can fail here if a node containing the selection becomes visibility:hidden |
| // after the selection is created and before this function is called. |
| x = pos.isNotNull() ? pos.node()->renderer()->caretRect(pos.offset(), m_sel.affinity()).x() : 0; |
| m_xPosForVerticalArrowNavigation = x; |
| } |
| else |
| x = m_xPosForVerticalArrowNavigation; |
| |
| return x; |
| } |
| |
| void SelectionController::clear() |
| { |
| setSelection(Selection()); |
| } |
| |
| void SelectionController::setBase(const VisiblePosition &pos, bool userTriggered) |
| { |
| setSelection(Selection(pos.deepEquivalent(), m_sel.extent(), pos.affinity()), true, true, userTriggered); |
| } |
| |
| void SelectionController::setExtent(const VisiblePosition &pos, bool userTriggered) |
| { |
| setSelection(Selection(m_sel.base(), pos.deepEquivalent(), pos.affinity()), true, true, userTriggered); |
| } |
| |
| void SelectionController::setBase(const Position &pos, EAffinity affinity, bool userTriggered) |
| { |
| setSelection(Selection(pos, m_sel.extent(), affinity), true, true, userTriggered); |
| } |
| |
| void SelectionController::setExtent(const Position &pos, EAffinity affinity, bool userTriggered) |
| { |
| setSelection(Selection(m_sel.base(), pos, affinity), true, true, userTriggered); |
| } |
| |
| void SelectionController::setNeedsLayout(bool flag) |
| { |
| m_needsLayout = flag; |
| } |
| |
| void SelectionController::layout() |
| { |
| if (isNone() || !m_sel.start().node()->inDocument() || !m_sel.end().node()->inDocument()) { |
| m_caretRect = IntRect(); |
| m_caretPositionOnLayout = IntPoint(); |
| return; |
| } |
| |
| m_sel.start().node()->document()->updateRendering(); |
| |
| m_caretRect = IntRect(); |
| m_caretPositionOnLayout = IntPoint(); |
| |
| if (isCaret()) { |
| Position pos = m_sel.start(); |
| pos = VisiblePosition(m_sel.start(), m_sel.affinity()).deepEquivalent(); |
| if (pos.isNotNull()) { |
| ASSERT(pos.node()->renderer()); |
| m_caretRect = pos.node()->renderer()->caretRect(pos.offset(), m_sel.affinity()); |
| |
| int x, y; |
| pos.node()->renderer()->absolutePositionForContent(x, y); |
| m_caretPositionOnLayout = IntPoint(x, y); |
| } |
| } |
| |
| m_needsLayout = false; |
| } |
| |
| IntRect SelectionController::caretRect() const |
| { |
| if (m_needsLayout) |
| const_cast<SelectionController *>(this)->layout(); |
| |
| IntRect caret = m_caretRect; |
| |
| if (m_sel.start().node() && m_sel.start().node()->renderer()) { |
| int x, y; |
| m_sel.start().node()->renderer()->absolutePositionForContent(x, y); |
| caret.move(IntPoint(x, y) - m_caretPositionOnLayout); |
| } |
| |
| return caret; |
| } |
| |
| IntRect SelectionController::caretRepaintRect() const |
| { |
| return caretRect(); |
| } |
| |
| bool SelectionController::recomputeCaretRect() |
| { |
| if (!m_frame || !m_frame->document()) |
| return false; |
| |
| FrameView* v = m_frame->document()->view(); |
| if (!v) |
| return false; |
| |
| if (!m_needsLayout) |
| return false; |
| |
| IntRect oldRect = m_caretRect; |
| m_needsLayout = true; |
| IntRect newRect = caretRect(); |
| if (oldRect == newRect) |
| return false; |
| |
| v->updateContents(oldRect, false); |
| v->updateContents(newRect, false); |
| return true; |
| } |
| |
| void SelectionController::invalidateCaretRect() |
| { |
| if (!isCaret()) |
| return; |
| |
| FrameView* v = m_sel.start().node()->document()->view(); |
| if (!v) |
| return; |
| |
| bool caretRectChanged = recomputeCaretRect(); |
| |
| // EDIT FIXME: This is an unfortunate hack. |
| // Basically, we can't trust this layout position since we |
| // can't guarantee that the check to see if we are in unrendered |
| // content will work at this point. We may have to wait for |
| // a layout and re-render of the document to happen. So, resetting this |
| // flag will cause another caret layout to happen the first time |
| // that we try to paint the caret after this call. That one will work since |
| // it happens after the document has accounted for any editing |
| // changes which may have been done. |
| // And, we need to leave this layout here so the caret moves right |
| // away after clicking. |
| m_needsLayout = true; |
| |
| if (!caretRectChanged) |
| v->updateContents(caretRepaintRect(), false); |
| } |
| |
| void SelectionController::paintCaret(GraphicsContext *p, const IntRect &rect) |
| { |
| if (! m_sel.isCaret()) |
| return; |
| |
| if (m_needsLayout) |
| layout(); |
| |
| IntRect caret = intersection(caretRect(), rect); |
| if (!caret.isEmpty()) { |
| Color caretColor = Color::black; |
| Element* element = rootEditableElement(); |
| if (element && element->renderer()) |
| caretColor = element->renderer()->style()->color(); |
| |
| p->fillRect(caret, caretColor); |
| } |
| } |
| |
| void SelectionController::debugRenderer(RenderObject *r, bool selected) const |
| { |
| if (r->node()->isElementNode()) { |
| Element *element = static_cast<Element *>(r->node()); |
| fprintf(stderr, "%s%s\n", selected ? "==> " : " ", element->localName().deprecatedString().latin1()); |
| } |
| else if (r->isText()) { |
| RenderText* textRenderer = static_cast<RenderText*>(r); |
| if (textRenderer->textLength() == 0 || !textRenderer->firstTextBox()) { |
| fprintf(stderr, "%s#text (empty)\n", selected ? "==> " : " "); |
| return; |
| } |
| |
| static const int max = 36; |
| DeprecatedString text = String(textRenderer->text()).deprecatedString(); |
| int textLength = text.length(); |
| if (selected) { |
| int offset = 0; |
| if (r->node() == m_sel.start().node()) |
| offset = m_sel.start().offset(); |
| else if (r->node() == m_sel.end().node()) |
| offset = m_sel.end().offset(); |
| |
| int pos; |
| InlineTextBox *box = textRenderer->findNextInlineTextBox(offset, pos); |
| text = text.mid(box->m_start, box->m_len); |
| |
| DeprecatedString show; |
| int mid = max / 2; |
| int caret = 0; |
| |
| // text is shorter than max |
| if (textLength < max) { |
| show = text; |
| caret = pos; |
| } |
| |
| // too few characters to left |
| else if (pos - mid < 0) { |
| show = text.left(max - 3) + "..."; |
| caret = pos; |
| } |
| |
| // enough characters on each side |
| else if (pos - mid >= 0 && pos + mid <= textLength) { |
| show = "..." + text.mid(pos - mid + 3, max - 6) + "..."; |
| caret = mid; |
| } |
| |
| // too few characters on right |
| else { |
| show = "..." + text.right(max - 3); |
| caret = pos - (textLength - show.length()); |
| } |
| |
| show.replace('\n', ' '); |
| show.replace('\r', ' '); |
| fprintf(stderr, "==> #text : \"%s\" at offset %d\n", show.latin1(), pos); |
| fprintf(stderr, " "); |
| for (int i = 0; i < caret; i++) |
| fprintf(stderr, " "); |
| fprintf(stderr, "^\n"); |
| } |
| else { |
| if ((int)text.length() > max) |
| text = text.left(max - 3) + "..."; |
| else |
| text = text.left(max); |
| fprintf(stderr, " #text : \"%s\"\n", text.latin1()); |
| } |
| } |
| } |
| |
| bool SelectionController::contains(const IntPoint& point) |
| { |
| Document* document = m_frame->document(); |
| |
| // Treat a collapsed selection like no selection. |
| if (!isRange()) |
| return false; |
| if (!document->renderer()) |
| return false; |
| |
| HitTestRequest request(true, true); |
| HitTestResult result(point); |
| document->renderer()->layer()->hitTest(request, result); |
| Node* innerNode = result.innerNode(); |
| if (!innerNode || !innerNode->renderer()) |
| return false; |
| |
| VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(result.localPoint())); |
| if (visiblePos.isNull()) |
| return false; |
| |
| if (m_sel.visibleStart().isNull() || m_sel.visibleEnd().isNull()) |
| return false; |
| |
| Position start(m_sel.visibleStart().deepEquivalent()); |
| Position end(m_sel.visibleEnd().deepEquivalent()); |
| Position p(visiblePos.deepEquivalent()); |
| |
| return comparePositions(start, p) <= 0 && comparePositions(p, end) <= 0; |
| } |
| |
| // Workaround for the fact that it's hard to delete a frame. |
| // Call this after doing user-triggered selections to make it easy to delete the frame you entirely selected. |
| // Can't do this implicitly as part of every setSelection call because in some contexts it might not be good |
| // for the focus to move to another frame. So instead we call it from places where we are selecting with the |
| // mouse or the keyboard after setting the selection. |
| void SelectionController::selectFrameElementInParentIfFullySelected() |
| { |
| // Find the parent frame; if there is none, then we have nothing to do. |
| Frame* parent = m_frame->tree()->parent(); |
| if (!parent) |
| return; |
| Page* page = m_frame->page(); |
| if (!page) |
| return; |
| |
| // Check if the selection contains the entire frame contents; if not, then there is nothing to do. |
| if (!isRange()) |
| return; |
| if (!isStartOfDocument(selection().visibleStart())) |
| return; |
| if (!isEndOfDocument(selection().visibleEnd())) |
| return; |
| |
| // Get to the <iframe> or <frame> (or even <object>) element in the parent frame. |
| Document* doc = m_frame->document(); |
| if (!doc) |
| return; |
| Element* ownerElement = doc->ownerElement(); |
| if (!ownerElement) |
| return; |
| Node* ownerElementParent = ownerElement->parentNode(); |
| if (!ownerElementParent) |
| return; |
| |
| // This method's purpose is it to make it easier to select iframes (in order to delete them). Don't do anything if the iframe isn't deletable. |
| if (!ownerElementParent->isContentEditable()) |
| return; |
| |
| // Create compute positions before and after the element. |
| unsigned ownerElementNodeIndex = ownerElement->nodeIndex(); |
| VisiblePosition beforeOwnerElement(VisiblePosition(ownerElementParent, ownerElementNodeIndex, SEL_DEFAULT_AFFINITY)); |
| VisiblePosition afterOwnerElement(VisiblePosition(ownerElementParent, ownerElementNodeIndex + 1, VP_UPSTREAM_IF_POSSIBLE)); |
| |
| // Focus on the parent frame, and then select from before this element to after. |
| Selection newSelection(beforeOwnerElement, afterOwnerElement); |
| if (parent->shouldChangeSelection(newSelection)) { |
| page->focusController()->setFocusedFrame(parent); |
| parent->selectionController()->setSelection(newSelection); |
| } |
| } |
| |
| void SelectionController::selectAll() |
| { |
| Document* document = m_frame->document(); |
| if (!document) |
| return; |
| |
| if (document->focusedNode() && document->focusedNode()->canSelectAll()) { |
| document->focusedNode()->selectAll(); |
| return; |
| } |
| |
| Node* root = isContentEditable() ? highestEditableRoot(m_sel.start()) : document->documentElement(); |
| if (!root) |
| return; |
| Selection newSelection(Selection::selectionFromContentsOfNode(root)); |
| if (m_frame->shouldChangeSelection(newSelection)) |
| setSelection(newSelection); |
| selectFrameElementInParentIfFullySelected(); |
| m_frame->notifyRendererOfSelectionChange(true); |
| } |
| |
| bool SelectionController::setSelectedRange(Range* range, EAffinity affinity, bool closeTyping) |
| { |
| if (!range) |
| return false; |
| |
| ExceptionCode ec = 0; |
| Node* startContainer = range->startContainer(ec); |
| if (ec) |
| return false; |
| |
| Node* endContainer = range->endContainer(ec); |
| if (ec) |
| return false; |
| |
| ASSERT(startContainer); |
| ASSERT(endContainer); |
| ASSERT(startContainer->document() == endContainer->document()); |
| |
| m_frame->document()->updateLayoutIgnorePendingStylesheets(); |
| |
| // Non-collapsed ranges are not allowed to start at the end of a line that is wrapped, |
| // they start at the beginning of the next line instead |
| bool collapsed = range->collapsed(ec); |
| if (ec) |
| return false; |
| |
| int startOffset = range->startOffset(ec); |
| if (ec) |
| return false; |
| |
| int endOffset = range->endOffset(ec); |
| if (ec) |
| return false; |
| |
| // FIXME: Can we provide extentAffinity? |
| VisiblePosition visibleStart(startContainer, startOffset, collapsed ? affinity : DOWNSTREAM); |
| VisiblePosition visibleEnd(endContainer, endOffset, SEL_DEFAULT_AFFINITY); |
| setSelection(Selection(visibleStart, visibleEnd), closeTyping); |
| return true; |
| } |
| |
| bool SelectionController::isInPasswordField() const |
| { |
| Node* startNode = start().node(); |
| if (!startNode) |
| return false; |
| |
| startNode = startNode->shadowAncestorNode(); |
| if (!startNode) |
| return false; |
| |
| if (!startNode->hasTagName(inputTag)) |
| return false; |
| |
| return static_cast<HTMLInputElement*>(startNode)->inputType() == HTMLInputElement::PASSWORD; |
| } |
| |
| bool SelectionController::isInsideNode() const |
| { |
| Node* startNode = start().node(); |
| if (!startNode) |
| return false; |
| return !isTableElement(startNode) && !editingIgnoresContent(startNode); |
| } |
| |
| void SelectionController::focusedOrActiveStateChanged() |
| { |
| bool activeAndFocused = isFocusedAndActive(); |
| |
| // Because RenderObject::selectionBackgroundColor() and |
| // RenderObject::selectionForegroundColor() check if the frame is active, |
| // we have to update places those colors were painted. |
| if (m_frame->view()) |
| m_frame->view()->updateContents(enclosingIntRect(m_frame->selectionRect())); |
| |
| // Caret appears in the active frame. |
| if (activeAndFocused) |
| m_frame->setSelectionFromNone(); |
| m_frame->setCaretVisible(activeAndFocused); |
| |
| // Update for caps lock state |
| m_frame->eventHandler()->capsLockStateMayHaveChanged(); |
| |
| // Because CSSStyleSelector::checkOneSelector() and |
| // RenderTheme::isFocused() check if the frame is active, we have to |
| // update style and theme state that depended on those. |
| if (Node* node = m_frame->document()->focusedNode()) { |
| node->setChanged(); |
| if (RenderObject* renderer = node->renderer()) |
| if (renderer && renderer->style()->hasAppearance()) |
| theme()->stateChanged(renderer, FocusState); |
| } |
| |
| // Secure keyboard entry is set by the active frame. |
| if (m_frame->document()->useSecureKeyboardEntryWhenActive()) |
| m_frame->setUseSecureKeyboardEntry(activeAndFocused); |
| } |
| |
| void SelectionController::pageActivationChanged() |
| { |
| focusedOrActiveStateChanged(); |
| } |
| |
| void SelectionController::setFocused(bool flag) |
| { |
| if (m_focused == flag) |
| return; |
| m_focused = flag; |
| |
| focusedOrActiveStateChanged(); |
| |
| if (Document* doc = m_frame->document()) |
| doc->dispatchWindowEvent(flag ? focusEvent : blurEvent, false, false); |
| } |
| |
| bool SelectionController::isFocusedAndActive() const |
| { |
| return m_focused && m_frame->page() && m_frame->page()->focusController()->isActive(); |
| } |
| |
| #ifndef NDEBUG |
| |
| void SelectionController::formatForDebugger(char* buffer, unsigned length) const |
| { |
| m_sel.formatForDebugger(buffer, length); |
| } |
| |
| void SelectionController::showTreeForThis() const |
| { |
| m_sel.showTreeForThis(); |
| } |
| |
| #endif |
| |
| } |
| |
| #ifndef NDEBUG |
| |
| void showTree(const WebCore::SelectionController& sel) |
| { |
| sel.showTreeForThis(); |
| } |
| |
| void showTree(const WebCore::SelectionController* sel) |
| { |
| if (sel) |
| sel->showTreeForThis(); |
| } |
| |
| #endif |
