void VisibleSelection::setStartAndEndFromBaseAndExtentRespectingGranularity(TextGranularity granularity)
{
    if (m_baseIsFirst) {
        m_start = m_base;
        m_end = m_extent;
    } else {
        m_start = m_extent;
        m_end = m_base;
    }

    switch (granularity) {
        case CharacterGranularity:
            // Don't do any expansion.
            break;
        case WordGranularity: {
            // General case: Select the word the caret is positioned inside of, or at the start of (RightWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a soft-wrapped line or the last word in
            // the document, select that last word (LeftWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a paragraph, select from the the end of the
            // last word to the line break (also RightWordIfOnBoundary);
            VisiblePosition start = VisiblePosition(m_start, m_affinity);
            VisiblePosition originalEnd(m_end, m_affinity);
            EWordSide side = RightWordIfOnBoundary;
            if (isEndOfEditableOrNonEditableContent(start) || (isEndOfLine(start) && !isStartOfLine(start) && !isEndOfParagraph(start)))
                side = LeftWordIfOnBoundary;
            m_start = startOfWord(start, side).deepEquivalent();
            side = RightWordIfOnBoundary;
            if (isEndOfEditableOrNonEditableContent(originalEnd) || (isEndOfLine(originalEnd) && !isStartOfLine(originalEnd) && !isEndOfParagraph(originalEnd)))
                side = LeftWordIfOnBoundary;

            VisiblePosition wordEnd(endOfWord(originalEnd, side));
            VisiblePosition end(wordEnd);

            if (isEndOfParagraph(originalEnd) && !isEmptyTableCell(m_start.deprecatedNode())) {
                // Select the paragraph break (the space from the end of a paragraph to the start of
                // the next one) to match TextEdit.
                end = wordEnd.next();

                if (Node* table = isFirstPositionAfterTable(end)) {
                    // The paragraph break after the last paragraph in the last cell of a block table ends
                    // at the start of the paragraph after the table.
                    if (isBlock(table))
                        end = end.next(CannotCrossEditingBoundary);
                    else
                        end = wordEnd;
                }

                if (end.isNull())
                    end = wordEnd;

            }

            m_end = end.deepEquivalent();
            break;
        }
        case SentenceGranularity: {
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        }
        case LineGranularity: {
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            VisiblePosition end = endOfLine(VisiblePosition(m_end, m_affinity));
            // If the end of this line is at the end of a paragraph, include the space
            // after the end of the line in the selection.
            if (isEndOfParagraph(end)) {
                VisiblePosition next = end.next();
                if (next.isNotNull())
                    end = next;
            }
            m_end = end.deepEquivalent();
            break;
        }
        case LineBoundary:
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfLine(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphGranularity: {
            VisiblePosition pos(m_start, m_affinity);
            if (isStartOfLine(pos) && isEndOfEditableOrNonEditableContent(pos))
                pos = pos.previous();
            m_start = startOfParagraph(pos).deepEquivalent();
            VisiblePosition visibleParagraphEnd = endOfParagraph(VisiblePosition(m_end, m_affinity));

            // Include the "paragraph break" (the space from the end of this paragraph to the start
            // of the next one) in the selection.
            VisiblePosition end(visibleParagraphEnd.next());

            if (Node* table = isFirstPositionAfterTable(end)) {
                // The paragraph break after the last paragraph in the last cell of a block table ends
                // at the start of the paragraph after the table, not at the position just after the table.
                if (isBlock(table))
                    end = end.next(CannotCrossEditingBoundary);
                // There is no parargraph break after the last paragraph in the last cell of an inline table.
                else
                    end = visibleParagraphEnd;
            }

            if (end.isNull())
                end = visibleParagraphEnd;

            m_end = end.deepEquivalent();
            break;
        }
        case DocumentBoundary:
            m_start = startOfDocument(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfDocument(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphBoundary:
            m_start = startOfParagraph(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfParagraph(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case SentenceBoundary:
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
    }

    // Make sure we do not have a dangling start or end.
    if (m_start.isNull())
        m_start = m_end;
    if (m_end.isNull())
        m_end = m_start;
}
void VisibleSelection::setStartAndEndFromBaseAndExtentRespectingGranularity(TextGranularity granularity)
{
    if (m_baseIsFirst) {
        m_start = m_base;
        m_end = m_extent;
    } else {
        m_start = m_extent;
        m_end = m_base;
    }

    switch (granularity) {
        case CharacterGranularity:
            // Don't do any expansion.
            break;
        case WordGranularity: {
            // General case: Select the word the caret is positioned inside of, or at the start of (RightWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a soft-wrapped line or the last word in
            // the document, select that last word (LeftWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a paragraph, select from the the end of the
            // last word to the line break (also RightWordIfOnBoundary);
            VisiblePosition start = VisiblePosition(m_start, m_affinity);
            VisiblePosition originalEnd(m_end, m_affinity);
            EWordSide side = RightWordIfOnBoundary;

			//SAMSUNG - Text Selection >>
			Document *doc = NULL;
			if (m_start.anchorNode())
				doc = m_start.anchorNode()->document();
			if (doc && doc->settings() && doc->settings()->advancedSelectionEnabled()) 
			{
				bool endOfDocument;
				if ( (endOfDocument = isEndOfDocument(start)) || ( (isEndOfLine(start) || isStartOfSpace(start)) && !isStartOfLine(start))) 
				{
					side = LeftWordIfOnBoundary;
					if (!endOfDocument && isEndOfParagraph(start)) 
					{
						originalEnd = start;
					}
				}
				m_start = startOfWord(start, side).deepEquivalent();
				side = RightWordIfOnBoundary;

				if (isStartOfSpace(start)) 
				{
					side = LeftWordIfOnBoundary;
				}

				if (isEndOfDocument(originalEnd) || (isEndOfLine(originalEnd) && !isStartOfLine(originalEnd)))
				side = LeftWordIfOnBoundary;

				VisiblePosition wordEnd(endOfWord(originalEnd, side));
				VisiblePosition end(wordEnd);
				m_end = end.deepEquivalent();
			} 
			else 
			{			
				//SAMSUNG - Text Selection <<

            if (isEndOfDocument(start) || (isEndOfLine(start) && !isStartOfLine(start) && !isEndOfParagraph(start)))
                side = LeftWordIfOnBoundary;
            m_start = startOfWord(start, side).deepEquivalent();
            side = RightWordIfOnBoundary;
            if (isEndOfDocument(originalEnd) || (isEndOfLine(originalEnd) && !isStartOfLine(originalEnd) && !isEndOfParagraph(originalEnd)))
                side = LeftWordIfOnBoundary;
                
            VisiblePosition wordEnd(endOfWord(originalEnd, side));
            VisiblePosition end(wordEnd);
            
            if (isEndOfParagraph(originalEnd) && !isEmptyTableCell(m_start.deprecatedNode())) {
                // Select the paragraph break (the space from the end of a paragraph to the start of 
                // the next one) to match TextEdit.
                end = wordEnd.next();
                
                if (Node* table = isFirstPositionAfterTable(end)) {
                    // The paragraph break after the last paragraph in the last cell of a block table ends
                    // at the start of the paragraph after the table.
                    if (isBlock(table))
                        end = end.next(CannotCrossEditingBoundary);
                    else
                        end = wordEnd;
                }
                
                if (end.isNull())
                    end = wordEnd;
                    
            }
                
            m_end = end.deepEquivalent();
//SAMSUNG - Text Selection >>		
			}
//SAMSUNG - Text Selection <<			
            break;
        }
        case SentenceGranularity: {
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        }
        case LineGranularity: {
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            VisiblePosition end = endOfLine(VisiblePosition(m_end, m_affinity));
            // If the end of this line is at the end of a paragraph, include the space 
            // after the end of the line in the selection.
            if (isEndOfParagraph(end)) {
                VisiblePosition next = end.next();
                if (next.isNotNull())
                    end = next;
            }
            m_end = end.deepEquivalent();
            break;
        }
        case LineBoundary:
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfLine(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphGranularity: {
            VisiblePosition pos(m_start, m_affinity);
            if (isStartOfLine(pos) && isEndOfDocument(pos))
                pos = pos.previous();
            m_start = startOfParagraph(pos).deepEquivalent();
            VisiblePosition visibleParagraphEnd = endOfParagraph(VisiblePosition(m_end, m_affinity));
            
            // Include the "paragraph break" (the space from the end of this paragraph to the start
            // of the next one) in the selection.
	//SAMSUNG - Text Selection >>
            // Here it tries to extend the end point from current paragraph to beginning of next paragraph. So somehow it is 
            // selecting the next paragraph also and it looks wrong when we do backward paragraph selection.
            // Even though user is trying to extend selection in backward direction, because of this condition it extends selection
            // in both directions. So commented the below code to avoid wrong backward text selection
            // WAS: VisiblePosition end(visibleParagraphEnd.next());
            VisiblePosition end(visibleParagraphEnd);
	//SAMSUNG - Text Selection <<

             
            if (Node* table = isFirstPositionAfterTable(end)) {
                // The paragraph break after the last paragraph in the last cell of a block table ends
                // at the start of the paragraph after the table, not at the position just after the table.
                if (isBlock(table))
                    end = end.next(CannotCrossEditingBoundary);
                // There is no parargraph break after the last paragraph in the last cell of an inline table.
                else
                    end = visibleParagraphEnd;
            }
             
            if (end.isNull())
                end = visibleParagraphEnd;
                
            m_end = end.deepEquivalent();
            break;
        }
        case DocumentBoundary:
            m_start = startOfDocument(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfDocument(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphBoundary:
            m_start = startOfParagraph(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfParagraph(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case SentenceBoundary:
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case WebKitVisualWordGranularity:
            break;
    }
    
    // Make sure we do not have a dangling start or end.
    if (m_start.isNull())
        m_start = m_end;
    if (m_end.isNull())
        m_end = m_start;
}
示例#3
0
void TypingCommand::deleteKeyPressed(TextGranularity granularity)
{
    Selection selectionToDelete;
    Selection selectionAfterUndo;
    
    switch (endingSelection().state()) {
        case Selection::RANGE:
            selectionToDelete = endingSelection();
            selectionAfterUndo = selectionToDelete;
            break;
        case Selection::CARET: {
            m_smartDelete = false;

            SelectionController selection;
            selection.setSelection(endingSelection());
            selection.modify(SelectionController::EXTEND, SelectionController::BACKWARD, granularity);
            
            // When the caret is at the start of the editable area in an empty list item, break out of the list item.
            if (endingSelection().visibleStart().previous(true).isNull()) {
                if (breakOutOfEmptyListItem()) {
                    typingAddedToOpenCommand();
                    return;
                }
            }
            
            VisiblePosition visibleStart(endingSelection().visibleStart());
            // If the caret is at the start of a paragraph after a table, move content into the last table cell.
            if (isStartOfParagraph(visibleStart) && isFirstPositionAfterTable(visibleStart.previous(true))) {
                // Unless the caret is just before a table.  We don't want to move a table into the last table cell.
                if (isLastPositionBeforeTable(visibleStart))
                    return;
                // Extend the selection backward into the last cell, then deletion will handle the move.
                selection.modify(SelectionController::EXTEND, SelectionController::BACKWARD, granularity);
            // If the caret is just after a table, select the table and don't delete anything.
            } else if (Node* table = isFirstPositionAfterTable(visibleStart)) {
                setEndingSelection(Selection(Position(table, 0), endingSelection().start(), DOWNSTREAM));
                typingAddedToOpenCommand();
                return;
            }

            selectionToDelete = selection.selection();
            if (!startingSelection().isRange() || selectionToDelete.base() != startingSelection().start())
                selectionAfterUndo = selectionToDelete;
            else
                // It's a little tricky to compute what the starting selection would have been in the original document.
                // We can't let the Selection class's validation kick in or it'll adjust for us based on
                // the current state of the document and we'll get the wrong result.
                selectionAfterUndo.setWithoutValidation(startingSelection().end(), selectionToDelete.extent());
            break;
        }
        case Selection::NONE:
            ASSERT_NOT_REACHED();
            break;
    }
    
    if (selectionToDelete.isCaretOrRange() && document()->frame()->shouldDeleteSelection(selectionToDelete)) {
        // Make undo select everything that has been deleted, unless an undo will undo more than just this deletion.
        // FIXME: This behaves like TextEdit except for the case where you open with text insertion and then delete
        // more text than you insert.  In that case all of the text that was around originally should be selected.
        if (m_openedByBackwardDelete)
            setStartingSelection(selectionAfterUndo);
        CompositeEditCommand::deleteSelection(selectionToDelete, m_smartDelete);
        setSmartDelete(false);
        typingAddedToOpenCommand();
    }
}
示例#4
0
void Selection::validate()
{
    // Move the selection to rendered positions, if possible.
    bool baseAndExtentEqual = m_base == m_extent;
    if (m_base.isNotNull()) {
        m_base = VisiblePosition(m_base, m_affinity).deepEquivalent();
        if (baseAndExtentEqual)
            m_extent = m_base;
    }
    if (m_extent.isNotNull() && !baseAndExtentEqual)
        m_extent = VisiblePosition(m_extent, m_affinity).deepEquivalent();

    // Make sure we do not have a dangling base or extent.
    if (m_base.isNull() && m_extent.isNull())
        m_baseIsFirst = true;
    else if (m_base.isNull()) {
        m_base = m_extent;
        m_baseIsFirst = true;
    } else if (m_extent.isNull()) {
        m_extent = m_base;
        m_baseIsFirst = true;
    } else {
        m_baseIsFirst = comparePositions(m_base, m_extent) <= 0;
    }

    if (m_baseIsFirst) {
        m_start = m_base;
        m_end = m_extent;
    } else {
        m_start = m_extent;
        m_end = m_base;
    }

    // Expand the selection if requested.
    switch (m_granularity) {
        case CharacterGranularity:
            // Don't do any expansion.
            break;
        case WordGranularity: {
            // General case: Select the word the caret is positioned inside of, or at the start of (RightWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a soft-wrapped line or the last word in
            // the document, select that last word (LeftWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a paragraph, select from the the end of the
            // last word to the line break (also RightWordIfOnBoundary);
            VisiblePosition start = VisiblePosition(m_start, m_affinity);
            VisiblePosition originalEnd(m_end, m_affinity);
            EWordSide side = RightWordIfOnBoundary;
            if (isEndOfDocument(start) || (isEndOfLine(start) && !isStartOfLine(start) && !isEndOfParagraph(start)))
                side = LeftWordIfOnBoundary;
            m_start = startOfWord(start, side).deepEquivalent();
            side = RightWordIfOnBoundary;
            if (isEndOfDocument(originalEnd) || (isEndOfLine(originalEnd) && !isStartOfLine(originalEnd) && !isEndOfParagraph(originalEnd)))
                side = LeftWordIfOnBoundary;
                
            VisiblePosition wordEnd(endOfWord(originalEnd, side));
            VisiblePosition end(wordEnd);
            
            if (isEndOfParagraph(originalEnd)) {
                // Select the paragraph break (the space from the end of a paragraph to the start of 
                // the next one) to match TextEdit.
                end = wordEnd.next();
                
                if (Node* table = isFirstPositionAfterTable(end)) {
                    // The paragraph break after the last paragraph in the last cell of a block table ends
                    // at the start of the paragraph after the table.
                    if (isBlock(table))
                        end = end.next(true);
                    else
                        end = wordEnd;
                }
                
                if (end.isNull())
                    end = wordEnd;
                    
            }
                
            m_end = end.deepEquivalent();
            break;
        }
        case SentenceGranularity: {
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        }
        case LineGranularity: {
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            VisiblePosition end = endOfLine(VisiblePosition(m_end, m_affinity));
            // If the end of this line is at the end of a paragraph, include the space 
            // after the end of the line in the selection.
            if (isEndOfParagraph(end)) {
                VisiblePosition next = end.next();
                if (next.isNotNull())
                    end = next;
            }
            m_end = end.deepEquivalent();
            break;
        }
        case LineBoundary:
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfLine(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphGranularity: {
            VisiblePosition pos(m_start, m_affinity);
            if (isStartOfLine(pos) && isEndOfDocument(pos))
                pos = pos.previous();
            m_start = startOfParagraph(pos).deepEquivalent();
            VisiblePosition visibleParagraphEnd = endOfParagraph(VisiblePosition(m_end, m_affinity));
            
            // Include the "paragraph break" (the space from the end of this paragraph to the start
            // of the next one) in the selection.
            VisiblePosition end(visibleParagraphEnd.next());
             
            if (Node* table = isFirstPositionAfterTable(end)) {
                // The paragraph break after the last paragraph in the last cell of a block table ends
                // at the start of the paragraph after the table, not at the position just after the table.
                if (isBlock(table))
                    end = end.next(true);
                // There is no parargraph break after the last paragraph in the last cell of an inline table.
                else
                    end = visibleParagraphEnd;
            }
             
            if (end.isNull())
                end = visibleParagraphEnd;
                
            m_end = end.deepEquivalent();
            break;
        }
        case DocumentBoundary:
            m_start = startOfDocument(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfDocument(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphBoundary:
            m_start = startOfParagraph(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfParagraph(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case SentenceBoundary:
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
    }
    
    // Make sure we do not have a dangling start or end.
    if (m_start.isNull())
        m_start = m_end;
    if (m_end.isNull())
        m_end = m_start;
    
    adjustForEditableContent();

    // adjust the state
    if (m_start.isNull()) {
        ASSERT(m_end.isNull());
        m_state = NONE;

        // enforce downstream affinity if not caret, as affinity only
        // makes sense for caret
        m_affinity = DOWNSTREAM;
    } else if (m_start == m_end || m_start.upstream() == m_end.upstream()) {
        m_state = CARET;
    } else {
        m_state = RANGE;

        // enforce downstream affinity if not caret, as affinity only
        // makes sense for caret
        m_affinity = DOWNSTREAM;

        // "Constrain" the selection to be the smallest equivalent range of nodes.
        // This is a somewhat arbitrary choice, but experience shows that it is
        // useful to make to make the selection "canonical" (if only for
        // purposes of comparing selections). This is an ideal point of the code
        // to do this operation, since all selection changes that result in a RANGE 
        // come through here before anyone uses it.
        m_start = m_start.downstream();
        m_end = m_end.upstream();
    }
}
void VisibleSelection::setStartAndEndFromBaseAndExtentRespectingGranularity(TextGranularity granularity)
{
    if (m_baseIsFirst) {
        m_start = m_base;
        m_end = m_extent;
    } else {
        m_start = m_extent;
        m_end = m_base;
    }

    switch (granularity) {
        case CharacterGranularity:
            // Don't do any expansion.
            break;
        case WordGranularity: {
            // General case: Select the word the caret is positioned inside of, or at the start of (RightWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a soft-wrapped line or the last word in
            // the document, select that last word (LeftWordIfOnBoundary).
            // Edge case: If the caret is after the last word in a paragraph, select from the the end of the
            // last word to the line break (also RightWordIfOnBoundary);
            VisiblePosition start = VisiblePosition(m_start, m_affinity);
            VisiblePosition originalEnd(m_end, m_affinity);
            EWordSide side = RightWordIfOnBoundary;
            if (isEndOfDocument(start) || (isEndOfLine(start) && !isStartOfLine(start) && !isEndOfParagraph(start)))
                side = LeftWordIfOnBoundary;
            m_start = startOfWord(start, side).deepEquivalent();
            side = RightWordIfOnBoundary;
            if (isEndOfDocument(originalEnd) || (isEndOfLine(originalEnd) && !isStartOfLine(originalEnd) && !isEndOfParagraph(originalEnd)))
                side = LeftWordIfOnBoundary;
                
            VisiblePosition wordEnd(endOfWord(originalEnd, side));
            VisiblePosition end(wordEnd);
            
            if (isEndOfParagraph(originalEnd) && !isEmptyTableCell(m_start.deprecatedNode())) {
                // Select the paragraph break (the space from the end of a paragraph to the start of 
                // the next one) to match TextEdit.
                end = wordEnd.next();
                
                if (Node* table = isFirstPositionAfterTable(end)) {
                    // The paragraph break after the last paragraph in the last cell of a block table ends
                    // at the start of the paragraph after the table.
                    if (isBlock(table))
                        end = end.next(CannotCrossEditingBoundary);
                    else
                        end = wordEnd;
                }
                
                if (end.isNull())
                    end = wordEnd;
                    
            }
                
            m_end = end.deepEquivalent();
		
            //added this to select only letters for dictionary viewing
            if( m_selectOnlyLetters && m_start.anchorNode()->isTextNode() && m_end.anchorNode()->isTextNode() ) {

                CharacterData* startText = static_cast<CharacterData*>(m_start.anchorNode());
                String startStr = startText->data();
                CharacterData* endText = static_cast<CharacterData*>(m_end.anchorNode());
                String endStr = endText->data();

                int n1 = m_start.offsetInContainerNode();
                int n2 = m_end.offsetInContainerNode() - 1;

                //unhandled corner case: at beginning of sentence, m_start may refer
                //to the Node of the last sentence, this causes the space at the beginning
                //of a sentence to be part of the selection. Assigning m_end to m_start and
                //adjusting the offset does not fix this. 		

                QChar c1 = startStr[n1];
                QChar c2 = endStr[n2];

                while(!c1.isLetter() && n1 <= n2) {
                    c1 = startStr[++n1];
                    m_start = m_start.next(Character);
                }

                while(!c2.isLetter() && n2 >= n1) {
                    c2 = endStr[--n2];
                    m_end = m_end.previous(Character);
                }
            }
            break;
        }
        case SentenceGranularity: {
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        }
        case LineGranularity: {
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            VisiblePosition end = endOfLine(VisiblePosition(m_end, m_affinity));
            // If the end of this line is at the end of a paragraph, include the space 
            // after the end of the line in the selection.
            if (isEndOfParagraph(end)) {
                VisiblePosition next = end.next();
                if (next.isNotNull())
                    end = next;
            }
            m_end = end.deepEquivalent();
            break;
        }
        case LineBoundary:
            m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfLine(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphGranularity: {
            VisiblePosition pos(m_start, m_affinity);
            if (isStartOfLine(pos) && isEndOfDocument(pos))
                pos = pos.previous();
            m_start = startOfParagraph(pos).deepEquivalent();
            VisiblePosition visibleParagraphEnd = endOfParagraph(VisiblePosition(m_end, m_affinity));
            
            // Include the "paragraph break" (the space from the end of this paragraph to the start
            // of the next one) in the selection.
            VisiblePosition end(visibleParagraphEnd.next());
             
            if (Node* table = isFirstPositionAfterTable(end)) {
                // The paragraph break after the last paragraph in the last cell of a block table ends
                // at the start of the paragraph after the table, not at the position just after the table.
                if (isBlock(table))
                    end = end.next(CannotCrossEditingBoundary);
                // There is no parargraph break after the last paragraph in the last cell of an inline table.
                else
                    end = visibleParagraphEnd;
            }
             
            if (end.isNull())
                end = visibleParagraphEnd;
                
            m_end = end.deepEquivalent();
            break;
        }
        case DocumentBoundary:
            m_start = startOfDocument(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfDocument(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case ParagraphBoundary:
            m_start = startOfParagraph(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfParagraph(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case SentenceBoundary:
            m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
            m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
            break;
        case WebKitVisualWordGranularity:
            break;
    }
    
    // Make sure we do not have a dangling start or end.
    if (m_start.isNull())
        m_start = m_end;
    if (m_end.isNull())
        m_end = m_start;
}