VisiblePositionRange AccessibilityObject::leftLineVisiblePositionRange(const VisiblePosition& visiblePos) const
{
    if (visiblePos.isNull())
        return VisiblePositionRange();

    // make a caret selection for the position before marker position (to make sure
    // we move off of a line start)
    VisiblePosition prevVisiblePos = visiblePos.previous();
    if (prevVisiblePos.isNull())
        return VisiblePositionRange();

    VisiblePosition startPosition = startOfLine(prevVisiblePos);

    // keep searching for a valid line start position.  Unless the VisiblePosition is at the very beginning, there should
    // always be a valid line range.  However, startOfLine will return null for position next to a floating object,
    // since floating object doesn't really belong to any line.
    // This check will reposition the marker before the floating object, to ensure we get a line start.
    if (startPosition.isNull()) {
        while (startPosition.isNull() && prevVisiblePos.isNotNull()) {
            prevVisiblePos = prevVisiblePos.previous();
            startPosition = startOfLine(prevVisiblePos);
        }
    } else
        startPosition = updateAXLineStartForVisiblePosition(startPosition);

    VisiblePosition endPosition = endOfLine(prevVisiblePos);
    return VisiblePositionRange(startPosition, endPosition);
}
void IndentOutdentCommand::doApply()
{
    if (endingSelection().isNone())
        return;

    if (!endingSelection().rootEditableElement())
        return;
        
    VisiblePosition visibleEnd = endingSelection().visibleEnd();
    VisiblePosition visibleStart = endingSelection().visibleStart();
    // When a selection ends at the start of a paragraph, we rarely paint 
    // the selection gap before that paragraph, because there often is no gap.  
    // In a case like this, it's not obvious to the user that the selection 
    // ends "inside" that paragraph, so it would be confusing if Indent/Outdent 
    // operated on that paragraph.
    // FIXME: We paint the gap before some paragraphs that are indented with left 
    // margin/padding, but not others.  We should make the gap painting more consistent and 
    // then use a left margin/padding rule here.
    if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd))
        setEndingSelection(Selection(visibleStart, visibleEnd.previous(true)));

    if (m_typeOfAction == Indent)
        indentRegion();
    else
        outdentRegion();
}
示例#3
0
RefPtr<Range> Frame::rangeForPoint(const IntPoint& framePoint)
{
    VisiblePosition position = visiblePositionForPoint(framePoint);
    if (position.isNull())
        return nullptr;

    Position deepPosition = position.deepEquivalent();
    Text* containerText = deepPosition.containerText();
    if (!containerText || !containerText->renderer() || containerText->renderer()->style().userSelect() == SELECT_NONE)
        return nullptr;

    VisiblePosition previous = position.previous();
    if (previous.isNotNull()) {
        RefPtr<Range> previousCharacterRange = makeRange(previous, position);
        LayoutRect rect = editor().firstRectForRange(previousCharacterRange.get());
        if (rect.contains(framePoint))
            return previousCharacterRange;
    }

    VisiblePosition next = position.next();
    if (RefPtr<Range> nextCharacterRange = makeRange(position, next)) {
        LayoutRect rect = editor().firstRectForRange(nextCharacterRange.get());
        if (rect.contains(framePoint))
            return nextCharacterRange;
    }

    return nullptr;
}
static VisiblePosition updateAXLineStartForVisiblePosition(const VisiblePosition& visiblePosition)
{
    // A line in the accessibility sense should include floating objects, such as aligned image, as part of a line.
    // So let's update the position to include that.
    VisiblePosition tempPosition;
    VisiblePosition startPosition = visiblePosition;
    Position p;
    RenderObject* renderer;
    while (true) {
        tempPosition = startPosition.previous();
        if (tempPosition.isNull())
            break;
        p = tempPosition.deepEquivalent();
        if (!p.node())
            break;
        renderer = p.node()->renderer();
        if (!renderer || renderer->isRenderBlock() && !p.offset())
            break;
        InlineBox* box;
        int ignoredCaretOffset;
        p.getInlineBoxAndOffset(tempPosition.affinity(), box, ignoredCaretOffset);
        if (box)
            break;
        startPosition = tempPosition;
    }

    return startPosition;
}
void InsertListCommand::unlistifyParagraph(const VisiblePosition& originalStart, HTMLElement* listNode, Node* listChildNode)
{
    Node* nextListChild;
    Node* previousListChild;
    VisiblePosition start;
    VisiblePosition end;
    if (listChildNode->hasTagName(liTag)) {
        start = firstDeepEditingPositionForNode(listChildNode);
        end = lastDeepEditingPositionForNode(listChildNode);
        nextListChild = listChildNode->nextSibling();
        previousListChild = listChildNode->previousSibling();
    } else {
        // A paragraph is visually a list item minus a list marker.  The paragraph will be moved.
        start = startOfParagraph(originalStart);
        end = endOfParagraph(start);
        nextListChild = enclosingListChild(end.next().deepEquivalent().node());
        ASSERT(nextListChild != listChildNode);
        if (enclosingList(nextListChild) != listNode)
            nextListChild = 0;
        previousListChild = enclosingListChild(start.previous().deepEquivalent().node());
        ASSERT(previousListChild != listChildNode);
        if (enclosingList(previousListChild) != listNode)
            previousListChild = 0;
    }
    // When removing a list, we must always create a placeholder to act as a point of insertion
    // for the list content being removed.
    RefPtr<Element> placeholder = createBreakElement(document());
    RefPtr<Element> nodeToInsert = placeholder;
    // If the content of the list item will be moved into another list, put it in a list item
    // so that we don't create an orphaned list child.
    if (enclosingList(listNode)) {
        nodeToInsert = createListItemElement(document());
        appendNode(placeholder, nodeToInsert);
    }

    if (nextListChild && previousListChild) {
        // We want to pull listChildNode out of listNode, and place it before nextListChild 
        // and after previousListChild, so we split listNode and insert it between the two lists.  
        // But to split listNode, we must first split ancestors of listChildNode between it and listNode,
        // if any exist.
        // FIXME: We appear to split at nextListChild as opposed to listChildNode so that when we remove
        // listChildNode below in moveParagraphs, previousListChild will be removed along with it if it is 
        // unrendered. But we ought to remove nextListChild too, if it is unrendered.
        splitElement(listNode, splitTreeToNode(nextListChild, listNode));
        insertNodeBefore(nodeToInsert, listNode);
    } else if (nextListChild || listChildNode->parentNode() != listNode) {
        // Just because listChildNode has no previousListChild doesn't mean there isn't any content
        // in listNode that comes before listChildNode, as listChildNode could have ancestors
        // between it and listNode. So, we split up to listNode before inserting the placeholder
        // where we're about to move listChildNode to.
        if (listChildNode->parentNode() != listNode)
            splitElement(listNode, splitTreeToNode(listChildNode, listNode).get());
        insertNodeBefore(nodeToInsert, listNode);
    } else
        insertNodeAfter(nodeToInsert, listNode);

    VisiblePosition insertionPoint = VisiblePosition(Position(placeholder.get(), 0));
    moveParagraphs(start, end, insertionPoint, true);
}
bool isFirstVisiblePositionInNode(const VisiblePosition &pos, const NodeImpl *node)
{
    if (pos.isNull())
        return false;

    VisiblePosition previous = pos.previous();
    return previous.isNull() || !previous.deepEquivalent().node()->isAncestor(node);
}
示例#7
0
void BlockCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
{
    // might be null if the recursion below goes awry
    if (startOfSelection.isNull() || endOfSelection.isNull())
        return;

    Node* startEnclosingCell = enclosingNodeOfType(startOfSelection.deepEquivalent(), &isTableCell);
    Node* endEnclosingCell = enclosingNodeOfType(endOfSelection.deepEquivalent(), &isTableCell);

    if (startEnclosingCell != endEnclosingCell) {
        if (startEnclosingCell && (!endEnclosingCell || !endEnclosingCell->isDescendantOf(startEnclosingCell))) {
            VisiblePosition newEnd = lastPositionInNode(startEnclosingCell);
            VisiblePosition nextStart = newEnd.next();
            while (isTableElement(nextStart.deepEquivalent().anchorNode()))
                nextStart = nextStart.next();
            // TODO: fix recursion!
            formatSelection(startOfSelection, newEnd);
            formatSelection(nextStart, endOfSelection);
            return;
        }

        ASSERT(endEnclosingCell);

        VisiblePosition nextStart = firstPositionInNode(endEnclosingCell);
        VisiblePosition newEnd = nextStart.previous();
        while (isTableElement(newEnd.deepEquivalent().anchorNode()))
            newEnd = newEnd.previous();
        // TODO: fix recursion!
        formatSelection(startOfSelection, newEnd);
        formatSelection(nextStart, endOfSelection);
        return;
    }


    Node* root = enclosingNodeOfType(startOfSelection.deepEquivalent(), &isTableCellOrRootEditable);
    if (!root || root == startOfSelection.deepEquivalent().anchorNode())
        return;

    RefPtr<Node> currentNode = blockExtentStart(startOfSelection.deepEquivalent().anchorNode(), root);
    RefPtr<Node> endNode = blockExtentEnd(endOfSelection.deepEquivalent().anchorNode(), root);

    while (currentNode->isDescendantOf(endNode.get()))
        endNode = endNode->lastChild();

    formatBlockExtent(currentNode, endNode, root);
}
bool isFirstVisiblePositionOnLine(const VisiblePosition &pos)
{
    if (pos.isNull())
        return false;

    VisiblePosition previous = pos.previous();
    return previous.isNull() || visiblePositionsOnDifferentLines(pos, previous);
}
示例#9
0
static VisiblePosition positionAvoidingFirstPositionInTable(const VisiblePosition& c)
{
    // return table offset 0 instead of the first VisiblePosition inside the table
    VisiblePosition previous = c.previous();
    if (isLastPositionBeforeTable(previous))
        return previous;
    
    return c;
}
void FormatBlockCommand::doApply()
{
    if (endingSelection().isNone())
        return;
    
    if (!endingSelection().rootEditableElement())
        return;

    VisiblePosition visibleEnd = endingSelection().visibleEnd();
    VisiblePosition visibleStart = endingSelection().visibleStart();
    // When a selection ends at the start of a paragraph, we rarely paint 
    // the selection gap before that paragraph, because there often is no gap.  
    // In a case like this, it's not obvious to the user that the selection 
    // ends "inside" that paragraph, so it would be confusing if FormatBlock
    // operated on that paragraph.
    // FIXME: We paint the gap before some paragraphs that are indented with left 
    // margin/padding, but not others.  We should make the gap painting more consistent and 
    // then use a left margin/padding rule here.
    if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd))
        setEndingSelection(Selection(visibleStart, visibleEnd.previous(true)));

    if (endingSelection().isRange() && modifyRange())
        return;
    
    String localName, prefix;
    if (!Document::parseQualifiedName(m_tagName, prefix, localName))
        return;
    QualifiedName qTypeOfBlock = QualifiedName(AtomicString(prefix), AtomicString(localName), xhtmlNamespaceURI);
    
    Node* refNode = enclosingBlockFlowElement(endingSelection().visibleStart());
    if (refNode->hasTagName(qTypeOfBlock))
        // We're already in a block with the format we want, so we don't have to do anything
        return;
    
    VisiblePosition paragraphStart = startOfParagraph(endingSelection().visibleStart());
    VisiblePosition paragraphEnd = endOfParagraph(endingSelection().visibleStart());
    VisiblePosition blockStart = startOfBlock(endingSelection().visibleStart());
    VisiblePosition blockEnd = endOfBlock(endingSelection().visibleStart());
    RefPtr<Node> blockNode = createElement(document(), m_tagName);
    RefPtr<Node> placeholder = createBreakElement(document());
    
    Node* root = endingSelection().start().node()->rootEditableElement();
    if (refNode == root || root->isDescendantOf(refNode))
        refNode = paragraphStart.deepEquivalent().node();
    
    Position upstreamStart = paragraphStart.deepEquivalent().upstream();
    if ((validBlockTag(refNode->nodeName().lower()) && paragraphStart == blockStart && paragraphEnd == blockEnd) ||
        !upstreamStart.node()->isDescendantOf(root))
        // Already in a valid block tag that only contains the current paragraph, so we can swap with the new tag
        insertNodeBefore(blockNode.get(), refNode);
    else {
        insertNodeAt(blockNode.get(), upstreamStart.node(), upstreamStart.offset());
    }
    appendNode(placeholder.get(), blockNode.get());
    moveParagraph(paragraphStart, paragraphEnd, VisiblePosition(Position(placeholder.get(), 0)), true, false);
}
示例#11
0
bool isFirstVisiblePositionInNode(const VisiblePosition &visiblePosition, const Node *node)
{
    if (visiblePosition.isNull())
        return false;

    if (!visiblePosition.deepEquivalent().containerNode()->isDescendantOf(node))
        return false;

    VisiblePosition previous = visiblePosition.previous();
    return previous.isNull() || !previous.deepEquivalent().deprecatedNode()->isDescendantOf(node);
}
示例#12
0
bool isFirstVisiblePositionInNode(const VisiblePosition &visiblePosition, const Node *node)
{
    if (visiblePosition.isNull())
        return false;
    
    if (!visiblePosition.deepEquivalent().node()->isAncestor(node))
        return false;
        
    VisiblePosition previous = visiblePosition.previous();
    return previous.isNull() || !previous.deepEquivalent().node()->isAncestor(node);
}
示例#13
0
VisiblePosition AccessibilityObject::previousWordStart(const VisiblePosition& visiblePos) const
{
    if (visiblePos.isNull())
        return VisiblePosition();

    // make sure we move off of a word start
    VisiblePosition prevVisiblePos = visiblePos.previous();
    if (prevVisiblePos.isNull())
        return VisiblePosition();

    return startOfWord(prevVisiblePos, RightWordIfOnBoundary);
}
示例#14
0
VisiblePosition AccessibilityObject::previousParagraphStartPosition(const VisiblePosition& visiblePos) const
{
    if (visiblePos.isNull())
        return VisiblePosition();

    // make sure we move off of a paragraph start
    VisiblePosition previousPos = visiblePos.previous();
    if (previousPos.isNull())
        return VisiblePosition();

    return startOfParagraph(previousPos);
}
示例#15
0
PassRefPtr<Range> trimWhitespaceFromRange(VisiblePosition startPosition, VisiblePosition endPosition)
{
    if (startPosition == endPosition || isRangeTextAllWhitespace(startPosition, endPosition))
        return 0;

    while (isWhitespace(startPosition.characterAfter()))
        startPosition = startPosition.next();

    while (isWhitespace(endPosition.characterBefore()))
        endPosition = endPosition.previous();

    return makeRange(startPosition, endPosition);
}
示例#16
0
VisiblePosition logicalEndOfLine(const VisiblePosition& c)
{
    VisiblePosition visPos = logicalEndPositionForLine(c);
    
    // Make sure the end of line is at the same line as the given input position. For a wrapping line, the logical end
    // position for the not-last-2-lines might incorrectly hand back the logical beginning of the next line. 
    // For example, <div contenteditable dir="rtl" style="line-break:before-white-space">abcdefg abcdefg abcdefg
    // a abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg abcdefg </div>
    // In this case, use the previous position of the computed logical end position.
    if (!inSameLogicalLine(c, visPos))
        visPos = visPos.previous();
    
    return c.honorEditableBoundaryAtOrBefore(visPos);
}
static Node* lastInSpecialElement(const Position& pos)
{
    Node* rootEditableElement = pos.node()->rootEditableElement();
    for (Node* n = pos.node(); n && n->rootEditableElement() == rootEditableElement; n = n->parentNode())
        if (isSpecialElement(n)) {
            VisiblePosition vPos = VisiblePosition(pos, DOWNSTREAM);
            VisiblePosition lastInElement = VisiblePosition(n, n->childNodeCount(), DOWNSTREAM);
            if (isTableElement(n) && vPos == lastInElement.previous())
                return n;
            if (vPos == lastInElement)
                return n;
        }
    return 0;
}
示例#18
0
static Node* lastInSpecialElement(const Position& pos)
{
    Node* rootEditableElement = pos.containerNode()->rootEditableElement();
    for (Node* n = pos.deprecatedNode(); n && n->rootEditableElement() == rootEditableElement; n = n->parentNode())
        if (isSpecialElement(n)) {
            VisiblePosition vPos = VisiblePosition(pos, DOWNSTREAM);
            VisiblePosition lastInElement = VisiblePosition(lastPositionInOrAfterNode(n), DOWNSTREAM);
            if (isTableElement(n) && vPos == lastInElement.previous())
                return n;
            if (vPos == lastInElement)
                return n;
        }
    return 0;
}
void ApplyBlockElementCommand::doApply()
{
    if (!endingSelection().rootEditableElement())
        return;

    VisiblePosition visibleEnd = endingSelection().visibleEnd();
    VisiblePosition visibleStart = endingSelection().visibleStart();
    if (visibleStart.isNull() || visibleStart.isOrphan() || visibleEnd.isNull() || visibleEnd.isOrphan())
        return;

    // When a selection ends at the start of a paragraph, we rarely paint
    // the selection gap before that paragraph, because there often is no gap.
    // In a case like this, it's not obvious to the user that the selection
    // ends "inside" that paragraph, so it would be confusing if Indent/Outdent
    // operated on that paragraph.
    // FIXME: We paint the gap before some paragraphs that are indented with left
    // margin/padding, but not others.  We should make the gap painting more consistent and
    // then use a left margin/padding rule here.
    if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd)) {
        VisibleSelection newSelection(visibleStart, visibleEnd.previous(CannotCrossEditingBoundary), endingSelection().isDirectional());
        if (newSelection.isNone())
            return;
        setEndingSelection(newSelection);
    }

    VisibleSelection selection = selectionForParagraphIteration(endingSelection());
    VisiblePosition startOfSelection = selection.visibleStart();
    VisiblePosition endOfSelection = selection.visibleEnd();
    ASSERT(!startOfSelection.isNull());
    ASSERT(!endOfSelection.isNull());
    RefPtrWillBeRawPtr<ContainerNode> startScope = nullptr;
    int startIndex = indexForVisiblePosition(startOfSelection, startScope);
    RefPtrWillBeRawPtr<ContainerNode> endScope = nullptr;
    int endIndex = indexForVisiblePosition(endOfSelection, endScope);

    formatSelection(startOfSelection, endOfSelection);

    document().updateLayoutIgnorePendingStylesheets();

    ASSERT(startScope == endScope);
    ASSERT(startIndex >= 0);
    ASSERT(startIndex <= endIndex);
    if (startScope == endScope && startIndex >= 0 && startIndex <= endIndex) {
        VisiblePosition start(visiblePositionForIndex(startIndex, startScope.get()));
        VisiblePosition end(visiblePositionForIndex(endIndex, endScope.get()));
        if (start.isNotNull() && end.isNotNull())
            setEndingSelection(VisibleSelection(start, end, endingSelection().isDirectional()));
    }
}
static Node* lastInSpecialElement(const Position& pos)
{
    // FIXME: This begins at pos.deprecatedNode(), which doesn't necessarily contain pos (suppose pos was [img, 0]).  See <rdar://problem/5027702>.
    Node* rootEditableElement = pos.deprecatedNode()->rootEditableElement();
    for (Node* n = pos.deprecatedNode(); n && n->rootEditableElement() == rootEditableElement; n = n->parentNode())
        if (isSpecialElement(n)) {
            VisiblePosition vPos = VisiblePosition(pos, DOWNSTREAM);
            VisiblePosition lastInElement = VisiblePosition(Position(n, n->childNodeCount(), Position::PositionIsOffsetInAnchor), DOWNSTREAM);
            if (isTableElement(n) && vPos == lastInElement.previous())
                return n;
            if (vPos == lastInElement)
                return n;
        }
    return 0;
}
示例#21
0
文件: Editor.cpp 项目: krockot/mojo
void Editor::transpose()
{
    if (!canEdit())
        return;

    VisibleSelection selection = m_frame.selection().selection();
    if (!selection.isCaret())
        return;

    // Make a selection that goes back one character and forward two characters.
    VisiblePosition caret = selection.visibleStart();
    VisiblePosition next = isEndOfParagraph(caret) ? caret : caret.next();
    VisiblePosition previous = next.previous();
    if (next == previous)
        return;
    previous = previous.previous();
    if (!inSameParagraph(next, previous))
        return;
    RefPtr<Range> range = makeRange(previous, next);
    if (!range)
        return;
    VisibleSelection newSelection(range.get(), DOWNSTREAM);

    // Transpose the two characters.
    String text = plainText(range.get());
    if (text.length() != 2)
        return;
    String transposed = text.right(1) + text.left(1);

    // Select the two characters.
    if (newSelection != m_frame.selection().selection())
        m_frame.selection().setSelection(newSelection);

    // Insert the transposed characters.
    replaceSelectionWithText(transposed, false, false);
}
示例#22
0
VisiblePosition AccessibilityObject::previousLineStartPosition(const VisiblePosition& visiblePos) const
{
    if (visiblePos.isNull())
        return VisiblePosition();

    // make sure we move off of a line start
    VisiblePosition prevVisiblePos = visiblePos.previous();
    if (prevVisiblePos.isNull())
        return VisiblePosition();

    VisiblePosition startPosition = startOfLine(prevVisiblePos);

    // as long as the position hasn't reached the beginning of the doc,  keep searching for a valid line start position
    // There are cases like when the position is next to a floating object that'll return null for start of line. This code will avoid returning null.
    if (startPosition.isNull()) {
        while (startPosition.isNull() && prevVisiblePos.isNotNull()) {
            prevVisiblePos = prevVisiblePos.previous();
            startPosition = startOfLine(prevVisiblePos);
        }
    } else
        startPosition = updateAXLineStartForVisiblePosition(startPosition);

    return startPosition;
}
示例#23
0
VisiblePosition endOfWord(const VisiblePosition &c, EWordSide side)
{
    VisiblePosition p = c;
    if (side == LeftWordIfOnBoundary) {
        if (isStartOfParagraph(c))
            return c;
            
        p = c.previous();
        if (p.isNull())
            return c;
    } else if (isEndOfParagraph(c))
        return c;
    
    return nextBoundary(p, endWordBoundary);
}
示例#24
0
void InsertListCommand::doApply()
{
    if (endingSelection().isNone())
        return;
    
    if (!endingSelection().rootEditableElement())
        return;
    
    VisiblePosition visibleEnd = endingSelection().visibleEnd();
    VisiblePosition visibleStart = endingSelection().visibleStart();
    // When a selection ends at the start of a paragraph, we rarely paint 
    // the selection gap before that paragraph, because there often is no gap.  
    // In a case like this, it's not obvious to the user that the selection 
    // ends "inside" that paragraph, so it would be confusing if InsertUn{Ordered}List 
    // operated on that paragraph.
    // FIXME: We paint the gap before some paragraphs that are indented with left 
    // margin/padding, but not others.  We should make the gap painting more consistent and 
    // then use a left margin/padding rule here.
    if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd))
        setEndingSelection(VisibleSelection(visibleStart, visibleEnd.previous(true)));

    if (endingSelection().isRange() && modifyRange())
        return;
    
    // FIXME: This will produce unexpected results for a selection that starts just before a
    // table and ends inside the first cell, selectionForParagraphIteration should probably
    // be renamed and deployed inside setEndingSelection().
    Node* selectionNode = endingSelection().start().node();
    const QualifiedName listTag = (m_type == OrderedList) ? olTag : ulTag;
    Node* listChildNode = enclosingListChild(selectionNode);
    bool switchListType = false;
    if (listChildNode) {
        // Remove the list chlild.
        HTMLElement* listNode = enclosingList(listChildNode);
        if (!listNode)
            listNode = fixOrphanedListChild(listChildNode);
        if (!listNode->hasTagName(listTag))
            // listChildNode will be removed from the list and a list of type m_type will be created.
            switchListType = true;

        unlistifyParagraph(endingSelection().visibleStart(), listNode, listChildNode);
    }

    if (!listChildNode || switchListType || m_forceCreateList)
        m_listElement = listifyParagraph(endingSelection().visibleStart(), listTag);
}
示例#25
0
VisiblePosition endOfLine(const VisiblePosition& c)
{
    VisiblePosition visPos = endPositionForLine(c);
    
    // Make sure the end of line is at the same line as the given input position.  Else use the previous position to 
    // obtain end of line.  This condition happens when the input position is before the space character at the end 
    // of a soft-wrapped non-editable line. In this scenario, endPositionForLine would incorrectly hand back a position
    // in the next line instead. This fix is to account for the discrepancy between lines with webkit-line-break:after-white-space style
    // versus lines without that style, which would break before a space by default. 
    if (!inSameLine(c, visPos)) {
        visPos = c.previous();
        if (visPos.isNull())
            return VisiblePosition();
        visPos = endPositionForLine(visPos);
    }
    
    return c.honorEditableBoundaryAtOrBefore(visPos);
}
void IndentOutdentCommand::doApply()
{
    if (!endingSelection().isNonOrphanedCaretOrRange())
        return;

    if (!endingSelection().rootEditableElement())
        return;
        
    VisiblePosition visibleEnd = endingSelection().visibleEnd();
    VisiblePosition visibleStart = endingSelection().visibleStart();
    // When a selection ends at the start of a paragraph, we rarely paint 
    // the selection gap before that paragraph, because there often is no gap.  
    // In a case like this, it's not obvious to the user that the selection 
    // ends "inside" that paragraph, so it would be confusing if Indent/Outdent 
    // operated on that paragraph.
    // FIXME: We paint the gap before some paragraphs that are indented with left 
    // margin/padding, but not others.  We should make the gap painting more consistent and 
    // then use a left margin/padding rule here.
    if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd))
        setEndingSelection(VisibleSelection(visibleStart, visibleEnd.previous(true)));

    VisibleSelection selection = selectionForParagraphIteration(endingSelection());
    VisiblePosition startOfSelection = selection.visibleStart();
    VisiblePosition endOfSelection = selection.visibleEnd();
    
    int startIndex = indexForVisiblePosition(startOfSelection);
    int endIndex = indexForVisiblePosition(endOfSelection);
    
    ASSERT(!startOfSelection.isNull());
    ASSERT(!endOfSelection.isNull());
    
    if (m_typeOfAction == Indent)
        indentRegion(startOfSelection, endOfSelection);
    else
        outdentRegion(startOfSelection, endOfSelection);

    updateLayout();
    
    RefPtr<Range> startRange = TextIterator::rangeFromLocationAndLength(document()->documentElement(), startIndex, 0, true);
    RefPtr<Range> endRange = TextIterator::rangeFromLocationAndLength(document()->documentElement(), endIndex, 0, true);
    if (startRange && endRange)
        setEndingSelection(VisibleSelection(startRange->startPosition(), endRange->startPosition(), DOWNSTREAM));
}
示例#27
0
VisiblePosition startOfLine(const VisiblePosition& c)
{
    VisiblePosition visPos = startPositionForLine(c);
    
    if (visPos.isNotNull()) {
        // Make sure the start of line is not greater than the given input position.  Else use the previous position to 
        // obtain start of line.  This condition happens when the input position is before the space character at the end 
        // of a soft-wrapped non-editable line. In this scenario, startPositionForLine would incorrectly hand back a position
        // greater than the input position.  This fix is to account for the discrepancy between lines with webkit-line-break:after-white-space 
        // style versus lines without that style, which would break before a space by default. 
        Position p = visPos.deepEquivalent();
        if (p.deprecatedEditingOffset() > c.deepEquivalent().deprecatedEditingOffset() && p.node()->isSameNode(c.deepEquivalent().node())) {
            visPos = c.previous();
            if (visPos.isNull())
                return VisiblePosition();
            visPos = startPositionForLine(visPos);
        }
    }

    return c.honorEditableBoundaryAtOrAfter(visPos);
}
示例#28
0
static VisiblePosition updateAXLineStartForVisiblePosition(const VisiblePosition& visiblePosition)
{
    // A line in the accessibility sense should include floating objects, such as aligned image, as part of a line.
    // So let's update the position to include that.
    VisiblePosition tempPosition;
    VisiblePosition startPosition = visiblePosition;
    while (true) {
        tempPosition = startPosition.previous();
        if (tempPosition.isNull())
            break;
        Position p = tempPosition.deepEquivalent();
        RenderObject* renderer = p.deprecatedNode()->renderer();
        if (!renderer || (renderer->isRenderBlock() && !p.deprecatedEditingOffset()))
            break;
        if (!RenderedPosition(tempPosition).isNull())
            break;
        startPosition = tempPosition;
    }

    return startPosition;
}
示例#29
0
VisiblePosition AccessibilityObject::previousSentenceStartPosition(const VisiblePosition& visiblePos) const
{
    // FIXME: FO 2 IMPLEMENT (currently returns incorrect answer)
    // Related? <rdar://problem/3927736> Text selection broken in 8A336
    if (visiblePos.isNull())
        return VisiblePosition();

    // make sure we move off of a sentence start
    VisiblePosition previousVisiblePos = visiblePos.previous();
    if (previousVisiblePos.isNull())
        return VisiblePosition();

    // treat empty line as a separate sentence.
    VisiblePosition startPosition;
    String lineString = plainText(makeRange(startOfLine(previousVisiblePos), endOfLine(previousVisiblePos)).get());
    if (lineString.isEmpty())
        startPosition = previousVisiblePos;
    else
        startPosition = startOfSentence(previousVisiblePos);

    return startPosition;
}
示例#30
0
PassRefPtr<Range> Frame::rangeForPoint(const LayoutPoint& framePoint)
{
    VisiblePosition position = visiblePositionForPoint(framePoint);
    if (position.isNull())
        return 0;

    VisiblePosition previous = position.previous();
    if (previous.isNotNull()) {
        RefPtr<Range> previousCharacterRange = makeRange(previous, position);
        LayoutRect rect = editor()->firstRectForRange(previousCharacterRange.get());
        if (rect.contains(framePoint))
            return previousCharacterRange.release();
    }

    VisiblePosition next = position.next();
    if (RefPtr<Range> nextCharacterRange = makeRange(position, next)) {
        LayoutRect rect = editor()->firstRectForRange(nextCharacterRange.get());
        if (rect.contains(framePoint))
            return nextCharacterRange.release();
    }

    return 0;
}