void CreateLinkCommand::doApply()
{
    if (endingSelection().isNone())
        return;
        
    RefPtr<HTMLAnchorElement> anchorElement = HTMLAnchorElement::create(document());
    anchorElement->setHref(m_url);
    
    if (endingSelection().isRange())
        applyStyledElement(anchorElement.get());
    else {
        insertNodeAt(anchorElement.get(), endingSelection().start());
        RefPtr<Text> textNode = Text::create(document(), m_url);
        appendNode(textNode.get(), anchorElement.get());
        setEndingSelection(VisibleSelection(positionInParentBeforeNode(anchorElement.get()), positionInParentAfterNode(anchorElement.get()), DOWNSTREAM));
    }
}
void CreateLinkCommand::doApply()
{
    if (endingSelection().isNone())
        return;

    RefPtrWillBeRawPtr<HTMLAnchorElement> anchorElement = HTMLAnchorElement::create(document());
    anchorElement->setHref(AtomicString(m_url));

    if (endingSelection().isRange()) {
        applyStyledElement(anchorElement.get());
    } else {
        insertNodeAt(anchorElement.get(), endingSelection().start());
        RefPtrWillBeRawPtr<Text> textNode = Text::create(document(), m_url);
        appendNode(textNode.get(), anchorElement.get());
        setEndingSelection(VisibleSelection(positionInParentBeforeNode(*anchorElement), positionInParentAfterNode(*anchorElement), TextAffinity::Downstream, endingSelection().isDirectional()));
    }
}
Example #3
0
// Neighbor-anchored positions are invalid DOM positions, so they need to be
// fixed up before handing them off to the Range object.
Position Position::parentAnchoredEquivalent() const
{
    if (!m_anchorNode)
        return Position();
    
    // FIXME: This should only be necessary for legacy positions, but is also needed for positions before and after Tables
    if (m_offset <= 0 && m_anchorType != PositionIsAfterAnchor) {
        if (m_anchorNode->parentNode() && (editingIgnoresContent(m_anchorNode.get()) || isTableElement(m_anchorNode.get())))
            return positionInParentBeforeNode(m_anchorNode.get());
        return firstPositionInOrBeforeNode(m_anchorNode.get());
    }
    if (!m_anchorNode->offsetInCharacters() && (m_anchorType == PositionIsAfterAnchor || static_cast<unsigned>(m_offset) == m_anchorNode->childNodeCount())
        && (editingIgnoresContent(m_anchorNode.get()) || isTableElement(m_anchorNode.get()))
        && containerNode()) {
        return positionInParentAfterNode(m_anchorNode.get());
    }

    return Position(containerNode(), computeOffsetInContainerNode(), PositionIsOffsetInAnchor);
}
void VisibleSelection::adjustSelectionToAvoidCrossingEditingBoundaries()
{
    if (m_base.isNull() || m_start.isNull() || m_end.isNull())
        return;

    // Early return in the caret case (the state hasn't actually been set yet, so we can't use isCaret()) to avoid the
    // expense of computing highestEditableRoot.
    if (m_base == m_start && m_base == m_end)
        return;

    Node* baseRoot = highestEditableRoot(m_base);
    Node* startRoot = highestEditableRoot(m_start);
    Node* endRoot = highestEditableRoot(m_end);
    
    Node* baseEditableAncestor = lowestEditableAncestor(m_base.containerNode());
    
    // The base, start and end are all in the same region.  No adjustment necessary.
    if (baseRoot == startRoot && baseRoot == endRoot)
        return;
    
    // The selection is based in editable content.
    if (baseRoot) {
        // If the start is outside the base's editable root, cap it at the start of that root.
        // If the start is in non-editable content that is inside the base's editable root, put it
        // at the first editable position after start inside the base's editable root.
        if (startRoot != baseRoot) {
            VisiblePosition first = firstEditablePositionAfterPositionInRoot(m_start, baseRoot);
            m_start = first.deepEquivalent();
            if (m_start.isNull()) {
                ASSERT_NOT_REACHED();
                m_start = m_end;
            }
        }
        // If the end is outside the base's editable root, cap it at the end of that root.
        // If the end is in non-editable content that is inside the base's root, put it
        // at the last editable position before the end inside the base's root.
        if (endRoot != baseRoot) {
            VisiblePosition last = lastEditablePositionBeforePositionInRoot(m_end, baseRoot);
            m_end = last.deepEquivalent();
            if (m_end.isNull())
                m_end = m_start;
        }
    // The selection is based in non-editable content.
    } else {
        // FIXME: Non-editable pieces inside editable content should be atomic, in the same way that editable
        // pieces in non-editable content are atomic.
    
        // The selection ends in editable content or non-editable content inside a different editable ancestor, 
        // move backward until non-editable content inside the same lowest editable ancestor is reached.
        Node* endEditableAncestor = lowestEditableAncestor(m_end.containerNode());
        if (endRoot || endEditableAncestor != baseEditableAncestor) {
            
            Position p = previousVisuallyDistinctCandidate(m_end);
            Node* shadowAncestor = endRoot ? endRoot->shadowHost() : 0;
            if (p.isNull() && shadowAncestor)
                p = positionAfterNode(shadowAncestor);
            while (p.isNotNull() && !(lowestEditableAncestor(p.containerNode()) == baseEditableAncestor && !isEditablePosition(p))) {
                Node* root = editableRootForPosition(p);
                shadowAncestor = root ? root->shadowHost() : 0;
                p = isAtomicNode(p.containerNode()) ? positionInParentBeforeNode(p.containerNode()) : previousVisuallyDistinctCandidate(p);
                if (p.isNull() && shadowAncestor)
                    p = positionAfterNode(shadowAncestor);
            }
            VisiblePosition previous(p);

            if (previous.isNull()) {
                // The selection crosses an Editing boundary.  This is a
                // programmer error in the editing code.  Happy debugging!
                ASSERT_NOT_REACHED();
                m_base = Position();
                m_extent = Position();
                validate();
                return;
            }
            m_end = previous.deepEquivalent();
        }

        // The selection starts in editable content or non-editable content inside a different editable ancestor, 
        // move forward until non-editable content inside the same lowest editable ancestor is reached.
        Node* startEditableAncestor = lowestEditableAncestor(m_start.containerNode());      
        if (startRoot || startEditableAncestor != baseEditableAncestor) {
            Position p = nextVisuallyDistinctCandidate(m_start);
            Node* shadowAncestor = startRoot ? startRoot->shadowHost() : 0;
            if (p.isNull() && shadowAncestor)
                p = positionBeforeNode(shadowAncestor);
            while (p.isNotNull() && !(lowestEditableAncestor(p.containerNode()) == baseEditableAncestor && !isEditablePosition(p))) {
                Node* root = editableRootForPosition(p);
                shadowAncestor = root ? root->shadowHost() : 0;
                p = isAtomicNode(p.containerNode()) ? positionInParentAfterNode(p.containerNode()) : nextVisuallyDistinctCandidate(p);
                if (p.isNull() && shadowAncestor)
                    p = positionBeforeNode(shadowAncestor);
            }
            VisiblePosition next(p);
            
            if (next.isNull()) {
                // The selection crosses an Editing boundary.  This is a
                // programmer error in the editing code.  Happy debugging!
                ASSERT_NOT_REACHED();
                m_base = Position();
                m_extent = Position();
                validate();
                return;
            }
            m_start = next.deepEquivalent();
        }
    }
    
    // Correct the extent if necessary.
    if (baseEditableAncestor != lowestEditableAncestor(m_extent.containerNode()))
        m_extent = m_baseIsFirst ? m_end : m_start;
}
void InsertTextCommand::input(const String& text, bool selectInsertedText, RebalanceType whitespaceRebalance)
{
    
    ASSERT(text.find('\n') == notFound);

    if (!endingSelection().isNonOrphanedCaretOrRange())
        return;

    // Delete the current selection.
    // FIXME: This delete operation blows away the typing style.
    if (endingSelection().isRange()) {
        if (performTrivialReplace(text, selectInsertedText))
            return;
        deleteSelection(false, true, true, false);
    }

    Position startPosition(endingSelection().start());
    
    Position placeholder;
    // We want to remove preserved newlines and brs that will collapse (and thus become unnecessary) when content 
    // is inserted just before them.
    // FIXME: We shouldn't really have to do this, but removing placeholders is a workaround for 9661.
    // If the caret is just before a placeholder, downstream will normalize the caret to it.
    Position downstream(startPosition.downstream());
    if (lineBreakExistsAtPosition(downstream)) {
        // FIXME: This doesn't handle placeholders at the end of anonymous blocks.
        VisiblePosition caret(startPosition);
        if (isEndOfBlock(caret) && isStartOfParagraph(caret))
            placeholder = downstream;
        // Don't remove the placeholder yet, otherwise the block we're inserting into would collapse before
        // we get a chance to insert into it.  We check for a placeholder now, though, because doing so requires
        // the creation of a VisiblePosition, and if we did that post-insertion it would force a layout.
    }
    
    // Insert the character at the leftmost candidate.
    startPosition = startPosition.upstream();
    
    // It is possible for the node that contains startPosition to contain only unrendered whitespace,
    // and so deleteInsignificantText could remove it.  Save the position before the node in case that happens.
    Position positionBeforeStartNode(positionInParentBeforeNode(startPosition.containerNode()));
    deleteInsignificantText(startPosition.upstream(), startPosition.downstream());
    if (!startPosition.anchorNode()->inDocument())
        startPosition = positionBeforeStartNode;
    if (!startPosition.isCandidate())
        startPosition = startPosition.downstream();
    
    startPosition = positionAvoidingSpecialElementBoundary(startPosition);
    
    Position endPosition;
    
    if (text == "\t") {
        endPosition = insertTab(startPosition);
        startPosition = endPosition.previous();
        if (placeholder.isNotNull())
            removePlaceholderAt(placeholder);
    } else {
        // Make sure the document is set up to receive text
        startPosition = positionInsideTextNode(startPosition);
        ASSERT(startPosition.anchorType() == Position::PositionIsOffsetInAnchor);
        ASSERT(startPosition.containerNode());
        ASSERT(startPosition.containerNode()->isTextNode());
        if (placeholder.isNotNull())
            removePlaceholderAt(placeholder);
        RefPtr<Text> textNode = static_cast<Text*>(startPosition.containerNode());
        const unsigned offset = startPosition.offsetInContainerNode();

        insertTextIntoNode(textNode, offset, text);
        endPosition = Position(textNode, offset + text.length());

        if (whitespaceRebalance == RebalanceLeadingAndTrailingWhitespaces) {
            // The insertion may require adjusting adjacent whitespace, if it is present.
            rebalanceWhitespaceAt(endPosition);
            // Rebalancing on both sides isn't necessary if we've inserted only spaces.
            if (!shouldRebalanceLeadingWhitespaceFor(text))
                rebalanceWhitespaceAt(startPosition);
        } else {
            ASSERT(whitespaceRebalance == RebalanceAllWhitespaces);
            if (canRebalance(startPosition) && canRebalance(endPosition))
                rebalanceWhitespaceOnTextSubstring(textNode, startPosition.offsetInContainerNode(), endPosition.offsetInContainerNode());
        }
    }

    // We could have inserted a part of composed character sequence,
    // so we are basically treating ending selection as a range to avoid validation.
    // <http://bugs.webkit.org/show_bug.cgi?id=15781>
    VisibleSelection forcedEndingSelection;
    forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
    setEndingSelection(forcedEndingSelection);

    // Handle the case where there is a typing style.
    if (RefPtr<EditingStyle> typingStyle = document()->frame()->selection()->typingStyle()) {
        typingStyle->prepareToApplyAt(endPosition, EditingStyle::PreserveWritingDirection);
        if (!typingStyle->isEmpty())
            applyStyle(typingStyle.get());
    }

    if (!selectInsertedText)
        setEndingSelection(VisibleSelection(endingSelection().end(), endingSelection().affinity()));
}
void InsertTextCommand::input(const String& text, bool selectInsertedText)
{
    
    ASSERT(text.find('\n') == notFound);

    if (!endingSelection().isNonOrphanedCaretOrRange())
        return;

    // Delete the current selection.
    // FIXME: This delete operation blows away the typing style.
    if (endingSelection().isRange()) {
        if (performTrivialReplace(text, selectInsertedText))
            return;
        deleteSelection(false, true, true, false);
    }

    Position startPosition(endingSelection().start());
    
    Position placeholder;
    // We want to remove preserved newlines and brs that will collapse (and thus become unnecessary) when content 
    // is inserted just before them.
    // FIXME: We shouldn't really have to do this, but removing placeholders is a workaround for 9661.
    // If the caret is just before a placeholder, downstream will normalize the caret to it.
    Position downstream(startPosition.downstream());
    if (lineBreakExistsAtPosition(downstream)) {
        // FIXME: This doesn't handle placeholders at the end of anonymous blocks.
        VisiblePosition caret(startPosition);
        if (isEndOfBlock(caret) && isStartOfParagraph(caret))
            placeholder = downstream;
        // Don't remove the placeholder yet, otherwise the block we're inserting into would collapse before
        // we get a chance to insert into it.  We check for a placeholder now, though, because doing so requires
        // the creation of a VisiblePosition, and if we did that post-insertion it would force a layout.
    }
    
    // Insert the character at the leftmost candidate.
    startPosition = startPosition.upstream();
    
    // It is possible for the node that contains startPosition to contain only unrendered whitespace,
    // and so deleteInsignificantText could remove it.  Save the position before the node in case that happens.
    Position positionBeforeStartNode(positionInParentBeforeNode(startPosition.node()));
    deleteInsignificantText(startPosition.upstream(), startPosition.downstream());
    if (!startPosition.node()->inDocument())
        startPosition = positionBeforeStartNode;
    if (!startPosition.isCandidate())
        startPosition = startPosition.downstream();
    
    startPosition = positionAvoidingSpecialElementBoundary(startPosition);
    
    Position endPosition;
    
    if (text == "\t") {
        endPosition = insertTab(startPosition);
        startPosition = endPosition.previous();
        if (placeholder.isNotNull())
            removePlaceholderAt(placeholder);
        m_charactersAdded += 1;
    } else {
        // Make sure the document is set up to receive text
        startPosition = prepareForTextInsertion(startPosition);
        if (placeholder.isNotNull())
            removePlaceholderAt(placeholder);
        Text *textNode = static_cast<Text *>(startPosition.node());
        int offset = startPosition.deprecatedEditingOffset();

        insertTextIntoNode(textNode, offset, text);
        endPosition = Position(textNode, offset + text.length());

        // The insertion may require adjusting adjacent whitespace, if it is present.
        rebalanceWhitespaceAt(endPosition);
        // Rebalancing on both sides isn't necessary if we've inserted a space.
        if (text != " ") 
            rebalanceWhitespaceAt(startPosition);
            
        m_charactersAdded += text.length();
    }

    // We could have inserted a part of composed character sequence,
    // so we are basically treating ending selection as a range to avoid validation.
    // <http://bugs.webkit.org/show_bug.cgi?id=15781>
    VisibleSelection forcedEndingSelection;
    forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
    setEndingSelection(forcedEndingSelection);

    // Handle the case where there is a typing style.
    CSSMutableStyleDeclaration* typingStyle = document()->frame()->selection()->typingStyle();
    RefPtr<CSSComputedStyleDeclaration> endingStyle = endPosition.computedStyle();
    RefPtr<CSSValue> unicodeBidi;
    RefPtr<CSSValue> direction;
    if (typingStyle) {
        unicodeBidi = typingStyle->getPropertyCSSValue(CSSPropertyUnicodeBidi);
        direction = typingStyle->getPropertyCSSValue(CSSPropertyDirection);
    }
    endingStyle->diff(typingStyle);
    if (typingStyle && unicodeBidi) {
        ASSERT(unicodeBidi->isPrimitiveValue());
        typingStyle->setProperty(CSSPropertyUnicodeBidi, static_cast<CSSPrimitiveValue*>(unicodeBidi.get())->getIdent());
        if (direction) {
            ASSERT(direction->isPrimitiveValue());
            typingStyle->setProperty(CSSPropertyDirection, static_cast<CSSPrimitiveValue*>(direction.get())->getIdent());
        }
    }

    if (typingStyle && typingStyle->length())
        applyStyle(typingStyle);

    if (!selectInsertedText)
        setEndingSelection(VisibleSelection(endingSelection().end(), endingSelection().affinity()));
}
void InsertTextCommand::doApply()
{
    ASSERT(m_text.find('\n') == kNotFound);

    if (!endingSelection().isNonOrphanedCaretOrRange())
        return;

    // Delete the current selection.
    // FIXME: This delete operation blows away the typing style.
    if (endingSelection().isRange()) {
        if (performTrivialReplace(m_text, m_selectInsertedText))
            return;
        bool endOfSelectionWasAtStartOfBlock = isStartOfBlock(endingSelection().visibleEnd());
        deleteSelection(false, true, false, false);
        // deleteSelection eventually makes a new endingSelection out of a Position. If that Position doesn't have
        // a renderer (e.g. it is on a <frameset> in the DOM), the VisibleSelection cannot be canonicalized to
        // anything other than NoSelection. The rest of this function requires a real endingSelection, so bail out.
        if (endingSelection().isNone())
            return;
        if (endOfSelectionWasAtStartOfBlock) {
            if (EditingStyle* typingStyle = document().frame()->selection().typingStyle())
                typingStyle->removeBlockProperties();
        }
    } else if (document().frame()->editor().isOverwriteModeEnabled()) {
        if (performOverwrite(m_text, m_selectInsertedText))
            return;
    }

    Position startPosition(endingSelection().start());

    Position placeholder;
    // We want to remove preserved newlines and brs that will collapse (and thus become unnecessary) when content
    // is inserted just before them.
    // FIXME: We shouldn't really have to do this, but removing placeholders is a workaround for 9661.
    // If the caret is just before a placeholder, downstream will normalize the caret to it.
    Position downstream(startPosition.downstream());
    if (lineBreakExistsAtPosition(downstream)) {
        // FIXME: This doesn't handle placeholders at the end of anonymous blocks.
        VisiblePosition caret(startPosition);
        if (isEndOfBlock(caret) && isStartOfParagraph(caret))
            placeholder = downstream;
        // Don't remove the placeholder yet, otherwise the block we're inserting into would collapse before
        // we get a chance to insert into it.  We check for a placeholder now, though, because doing so requires
        // the creation of a VisiblePosition, and if we did that post-insertion it would force a layout.
    }

    // Insert the character at the leftmost candidate.
    startPosition = startPosition.upstream();

    // It is possible for the node that contains startPosition to contain only unrendered whitespace,
    // and so deleteInsignificantText could remove it.  Save the position before the node in case that happens.
    ASSERT(startPosition.containerNode());
    Position positionBeforeStartNode(positionInParentBeforeNode(*startPosition.containerNode()));
    deleteInsignificantText(startPosition, startPosition.downstream());
    if (!startPosition.inDocument())
        startPosition = positionBeforeStartNode;
    if (!startPosition.isCandidate())
        startPosition = startPosition.downstream();

    startPosition = positionAvoidingSpecialElementBoundary(startPosition);

    Position endPosition;

    if (m_text == "\t") {
        endPosition = insertTab(startPosition);
        startPosition = endPosition.previous();
        if (placeholder.isNotNull())
            removePlaceholderAt(placeholder);
    } else {
        // Make sure the document is set up to receive m_text
        startPosition = positionInsideTextNode(startPosition);
        ASSERT(startPosition.anchorType() == Position::PositionIsOffsetInAnchor);
        ASSERT(startPosition.containerNode());
        ASSERT(startPosition.containerNode()->isTextNode());
        if (placeholder.isNotNull())
            removePlaceholderAt(placeholder);
        RefPtrWillBeRawPtr<Text> textNode = startPosition.containerText();
        const unsigned offset = startPosition.offsetInContainerNode();

        insertTextIntoNode(textNode, offset, m_text);
        endPosition = Position(textNode, offset + m_text.length());

        if (m_rebalanceType == RebalanceLeadingAndTrailingWhitespaces) {
            // The insertion may require adjusting adjacent whitespace, if it is present.
            rebalanceWhitespaceAt(endPosition);
            // Rebalancing on both sides isn't necessary if we've inserted only spaces.
            if (!shouldRebalanceLeadingWhitespaceFor(m_text))
                rebalanceWhitespaceAt(startPosition);
        } else {
            ASSERT(m_rebalanceType == RebalanceAllWhitespaces);
            if (canRebalance(startPosition) && canRebalance(endPosition))
                rebalanceWhitespaceOnTextSubstring(textNode, startPosition.offsetInContainerNode(), endPosition.offsetInContainerNode());
        }
    }

    setEndingSelectionWithoutValidation(startPosition, endPosition);

    // Handle the case where there is a typing style.
    if (RefPtrWillBeRawPtr<EditingStyle> typingStyle = document().frame()->selection().typingStyle()) {
        typingStyle->prepareToApplyAt(endPosition, EditingStyle::PreserveWritingDirection);
        if (!typingStyle->isEmpty())
            applyStyle(typingStyle.get());
    }

    if (!m_selectInsertedText)
        setEndingSelection(VisibleSelection(endingSelection().end(), endingSelection().affinity(), endingSelection().isDirectional()));
}