--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/rendering/RenderText.cpp Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,1251 @@
+/**
+ * (C) 1999 Lars Knoll (knoll@kde.org)
+ * (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
+ * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "RenderText.h"
+
+#include "CharacterNames.h"
+#include "InlineTextBox.h"
+#include "Range.h"
+#include "RenderArena.h"
+#include "RenderBlock.h"
+#include "RenderLayer.h"
+#include "Text.h"
+#include "TextBreakIterator.h"
+#include "TextStyle.h"
+#include "break_lines.h"
+#include <wtf/AlwaysInline.h>
+
+using namespace std;
+using namespace WTF;
+using namespace Unicode;
+
+namespace WebCore {
+
+#if PLATFORM(SYMBIAN)
+
+const double KSecureTimerTimeout = 0.8f;
+
+#endif
+
+static inline bool charactersAreAllASCII(const StringImpl* text)
+{
+ const UChar* chars = text->characters();
+ unsigned length = text->length();
+ UChar ored = 0;
+ for (unsigned i = 0; i < length; ++i)
+ ored |= chars[i];
+ return !(ored & 0xFF80);
+}
+
+RenderText::RenderText(Node* node, PassRefPtr<StringImpl> str)
+ : RenderObject(node)
+ , m_text(str)
+ , m_firstTextBox(0)
+ , m_lastTextBox(0)
+ , m_minWidth(-1)
+ , m_maxWidth(-1)
+ , m_selectionState(SelectionNone)
+ , m_hasTab(false)
+ , m_linesDirty(false)
+ , m_containsReversedText(false)
+ , m_isAllASCII(charactersAreAllASCII(m_text.get()))
+
+#if PLATFORM(SYMBIAN)
+
+ , m_securityTimer(this, &RenderText::securityTimerFired)
+
+#endif
+
+{
+ ASSERT(m_text);
+ setRenderText();
+ m_text = m_text->replace('\\', backslashAsCurrencySymbol());
+}
+
+#ifndef NDEBUG
+
+RenderText::~RenderText()
+{
+ ASSERT(!m_firstTextBox);
+ ASSERT(!m_lastTextBox);
+}
+
+#endif
+
+void RenderText::setStyle(RenderStyle* newStyle)
+{
+ RenderStyle* oldStyle = style();
+ if (oldStyle == newStyle)
+ return;
+
+ ETextTransform oldTransform = oldStyle ? oldStyle->textTransform() : TTNONE;
+ ETextSecurity oldSecurity = oldStyle ? oldStyle->textSecurity() : TSNONE;
+
+ RenderObject::setStyle(newStyle);
+
+ if (oldTransform != newStyle->textTransform() || oldSecurity != newStyle->textSecurity()
+#if ENABLE(SVG)
+ || isSVGText() /* All SVG text has to be transformed */
+#endif
+ ) {
+ if (RefPtr<StringImpl> textToTransform = originalText())
+ setText(textToTransform.release(), true);
+ }
+}
+
+void RenderText::destroy()
+{
+ if (!documentBeingDestroyed()) {
+ if (firstTextBox()) {
+ if (isBR()) {
+ RootInlineBox* next = firstTextBox()->root()->nextRootBox();
+ if (next)
+ next->markDirty();
+ }
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())
+ box->remove();
+ } else if (parent())
+ parent()->dirtyLinesFromChangedChild(this);
+ }
+ deleteTextBoxes();
+ RenderObject::destroy();
+}
+
+void RenderText::extractTextBox(InlineTextBox* box)
+{
+ checkConsistency();
+
+ m_lastTextBox = box->prevTextBox();
+ if (box == m_firstTextBox)
+ m_firstTextBox = 0;
+ if (box->prevTextBox())
+ box->prevTextBox()->setNextLineBox(0);
+ box->setPreviousLineBox(0);
+ for (InlineRunBox* curr = box; curr; curr = curr->nextLineBox())
+ curr->setExtracted();
+
+ checkConsistency();
+}
+
+void RenderText::attachTextBox(InlineTextBox* box)
+{
+ checkConsistency();
+
+ if (m_lastTextBox) {
+ m_lastTextBox->setNextLineBox(box);
+ box->setPreviousLineBox(m_lastTextBox);
+ } else
+ m_firstTextBox = box;
+ InlineTextBox* last = box;
+ for (InlineTextBox* curr = box; curr; curr = curr->nextTextBox()) {
+ curr->setExtracted(false);
+ last = curr;
+ }
+ m_lastTextBox = last;
+
+ checkConsistency();
+}
+
+void RenderText::removeTextBox(InlineTextBox* box)
+{
+ checkConsistency();
+
+ if (box == m_firstTextBox)
+ m_firstTextBox = box->nextTextBox();
+ if (box == m_lastTextBox)
+ m_lastTextBox = box->prevTextBox();
+ if (box->nextTextBox())
+ box->nextTextBox()->setPreviousLineBox(box->prevTextBox());
+ if (box->prevTextBox())
+ box->prevTextBox()->setNextLineBox(box->nextTextBox());
+
+ checkConsistency();
+}
+
+void RenderText::deleteTextBoxes()
+{
+ if (firstTextBox()) {
+ RenderArena* arena = renderArena();
+ InlineTextBox* next;
+ for (InlineTextBox* curr = firstTextBox(); curr; curr = next) {
+ next = curr->nextTextBox();
+ curr->destroy(arena);
+ }
+ m_firstTextBox = m_lastTextBox = 0;
+ }
+}
+
+PassRefPtr<StringImpl> RenderText::originalText() const
+{
+ Node* e = element();
+ return e ? static_cast<Text*>(e)->string() : 0;
+}
+
+void RenderText::absoluteRects(Vector<IntRect>& rects, int tx, int ty, bool)
+{
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())
+ rects.append(IntRect(tx + box->xPos(), ty + box->yPos(), box->width(), box->height()));
+}
+
+void RenderText::addLineBoxRects(Vector<IntRect>& rects, unsigned start, unsigned end, bool useSelectionHeight)
+{
+ int x, y;
+ absolutePositionForContent(x, y);
+
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
+ if (start <= box->start() && box->end() <= end)
+ rects.append(IntRect(x + box->xPos(), y + box->yPos(), box->width(), box->height()));
+ else {
+ unsigned realEnd = min(box->end() + 1, end); // box->end() points at the last char, not after it
+ IntRect r = box->selectionRect(x, y, start, realEnd);
+ if (!r.isEmpty()) {
+ if (!useSelectionHeight) {
+ // change the height and y position because selectionRect uses selection-specific values
+ r.setHeight(box->height());
+ r.setY(y + box->yPos());
+ }
+ rects.append(r);
+ }
+ }
+ }
+}
+
+InlineTextBox* RenderText::findNextInlineTextBox(int offset, int& pos) const
+{
+ // The text runs point to parts of the RenderText's m_text
+ // (they don't include '\n')
+ // Find the text run that includes the character at offset
+ // and return pos, which is the position of the char in the run.
+
+ if (!m_firstTextBox)
+ return 0;
+
+ InlineTextBox* s = m_firstTextBox;
+ int off = s->m_len;
+ while (offset > off && s->nextTextBox()) {
+ s = s->nextTextBox();
+ off = s->m_start + s->m_len;
+ }
+ // we are now in the correct text run
+ pos = (offset > off ? s->m_len : s->m_len - (off - offset) );
+ return s;
+}
+
+VisiblePosition RenderText::positionForCoordinates(int x, int y)
+{
+ if (!firstTextBox() || textLength() == 0)
+ return VisiblePosition(element(), 0, DOWNSTREAM);
+
+ // Get the offset for the position, since this will take rtl text into account.
+ int offset;
+
+ // FIXME: We should be able to roll these special cases into the general cases in the loop below.
+ if (firstTextBox() && y < firstTextBox()->root()->bottomOverflow() && x < firstTextBox()->m_x) {
+ // at the y coordinate of the first line or above
+ // and the x coordinate is to the left of the first text box left edge
+ offset = firstTextBox()->offsetForPosition(x);
+ return VisiblePosition(element(), offset + firstTextBox()->m_start, DOWNSTREAM);
+ }
+ if (lastTextBox() && y >= lastTextBox()->root()->topOverflow() && x >= lastTextBox()->m_x + lastTextBox()->m_width) {
+ // at the y coordinate of the last line or below
+ // and the x coordinate is to the right of the last text box right edge
+ offset = lastTextBox()->offsetForPosition(x);
+ return VisiblePosition(element(), offset + lastTextBox()->m_start, DOWNSTREAM);
+ }
+
+ InlineTextBox* lastBoxAbove = 0;
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
+ if (y >= box->root()->topOverflow()) {
+ int bottom = box->root()->nextRootBox() ? box->root()->nextRootBox()->topOverflow() : box->root()->bottomOverflow();
+ if (y < bottom) {
+ offset = box->offsetForPosition(x);
+
+ if (x == box->m_x)
+ // the x coordinate is equal to the left edge of this box
+ // the affinity must be downstream so the position doesn't jump back to the previous line
+ return VisiblePosition(element(), offset + box->m_start, DOWNSTREAM);
+
+ if (x < box->m_x + box->m_width)
+ // and the x coordinate is to the left of the right edge of this box
+ // check to see if position goes in this box
+ return VisiblePosition(element(), offset + box->m_start, offset > 0 ? VP_UPSTREAM_IF_POSSIBLE : DOWNSTREAM);
+
+ if (!box->prevOnLine() && x < box->m_x)
+ // box is first on line
+ // and the x coordinate is to the left of the first text box left edge
+ return VisiblePosition(element(), offset + box->m_start, DOWNSTREAM);
+
+ if (!box->nextOnLine())
+ // box is last on line
+ // and the x coordinate is to the right of the last text box right edge
+ // generate VisiblePosition, use UPSTREAM affinity if possible
+ return VisiblePosition(element(), offset + box->m_start, VP_UPSTREAM_IF_POSSIBLE);
+ }
+ lastBoxAbove = box;
+ }
+ }
+
+ return VisiblePosition(element(), lastBoxAbove ? lastBoxAbove->m_start + lastBoxAbove->m_len : 0, DOWNSTREAM);
+}
+
+static RenderObject* lastRendererOnPrevLine(InlineBox* box)
+{
+ if (!box)
+ return 0;
+
+ RootInlineBox* root = box->root();
+ if (!root)
+ return 0;
+
+ if (root->endsWithBreak())
+ return 0;
+
+ RootInlineBox* prevRoot = root->prevRootBox();
+ if (!prevRoot)
+ return 0;
+
+ InlineBox* lastChild = prevRoot->lastChild();
+ if (!lastChild)
+ return 0;
+
+ return lastChild->object();
+}
+
+static inline bool atLineWrap(InlineTextBox* box, int offset)
+{
+ return box->nextTextBox() && !box->nextOnLine() && offset == box->m_start + box->m_len;
+}
+
+IntRect RenderText::caretRect(int offset, EAffinity affinity, int* extraWidthToEndOfLine)
+{
+ if (!firstTextBox() || !textLength())
+ return IntRect();
+
+ // Find the text box for the given offset
+ InlineTextBox* box = 0;
+ for (box = firstTextBox(); box; box = box->nextTextBox()) {
+ if (box->containsCaretOffset(offset)) {
+ // Check if downstream affinity would make us move to the next line.
+ if (atLineWrap(box, offset) && affinity == DOWNSTREAM) {
+ // Use the next text box
+ box = box->nextTextBox();
+ offset = box->m_start;
+ } else {
+ InlineTextBox* prevBox = box->prevTextBox();
+ if (offset == box->m_start && affinity == UPSTREAM && prevBox && !box->prevOnLine()) {
+ if (prevBox) {
+ box = prevBox;
+ offset = box->m_start + box->m_len;
+ } else {
+ RenderObject *object = lastRendererOnPrevLine(box);
+ if (object)
+ return object->caretRect(0, affinity);
+ }
+ }
+ }
+ break;
+ }
+ }
+
+ if (!box)
+ return IntRect();
+
+ int height = box->root()->bottomOverflow() - box->root()->topOverflow();
+ int top = box->root()->topOverflow();
+
+ int left = box->positionForOffset(offset);
+
+ int rootLeft = box->root()->xPos();
+ // FIXME: should we use the width of the root inline box or the
+ // width of the containing block for this?
+ if (extraWidthToEndOfLine)
+ *extraWidthToEndOfLine = (box->root()->width() + rootLeft) - (left + 1);
+
+ int absx, absy;
+ absolutePositionForContent(absx, absy);
+ left += absx;
+ top += absy;
+
+ RenderBlock* cb = containingBlock();
+ if (style()->autoWrap()) {
+ int availableWidth = cb->lineWidth(top);
+ if (!box->m_reversed)
+ left = min(left, absx + rootLeft + availableWidth - 1);
+ else
+ left = max(left, absx + rootLeft);
+ }
+
+ return IntRect(left, top, 1, height);
+}
+
+ALWAYS_INLINE int RenderText::widthFromCache(const Font& f, int start, int len, int xPos) const
+{
+ if (f.isFixedPitch() && !f.isSmallCaps() && m_isAllASCII) {
+ // FIXME: This code should be simplfied; it's only run when m_text is known to be all 0000-007F,
+ // but is uses the general purpose Unicode direction function.
+ int monospaceCharacterWidth = f.spaceWidth();
+ int tabWidth = allowTabs() ? monospaceCharacterWidth * 8 : 0;
+ int w = 0;
+ char previousChar = ' '; // FIXME: Preserves historical behavior, but seems wrong for start > 0.
+ for (int i = start; i < start + len; i++) {
+ char c = (*m_text)[i];
+ Direction dir = direction(c);
+ if (dir != NonSpacingMark && dir != BoundaryNeutral) {
+ if (c == '\t' && tabWidth)
+ w += tabWidth - ((xPos + w) % tabWidth);
+ else
+ w += monospaceCharacterWidth;
+ if (isspace(c) && !isspace(previousChar))
+ w += f.wordSpacing();
+ }
+ previousChar = c;
+ }
+ return w;
+ }
+
+ return f.width(TextRun(text()->characters() + start, len), TextStyle(allowTabs(), xPos));
+}
+
+void RenderText::trimmedPrefWidths(int leadWidth,
+ int& beginMinW, bool& beginWS,
+ int& endMinW, bool& endWS,
+ bool& hasBreakableChar, bool& hasBreak,
+ int& beginMaxW, int& endMaxW,
+ int& minW, int& maxW, bool& stripFrontSpaces)
+{
+ bool collapseWhiteSpace = style()->collapseWhiteSpace();
+ if (!collapseWhiteSpace)
+ stripFrontSpaces = false;
+
+ if (m_hasTab || prefWidthsDirty())
+ calcPrefWidths(leadWidth);
+
+ int len = textLength();
+ if (!len || (stripFrontSpaces && m_text->containsOnlyWhitespace())) {
+ maxW = 0;
+ hasBreak = false;
+ return;
+ }
+
+ minW = m_minWidth;
+ maxW = m_maxWidth;
+ beginWS = !stripFrontSpaces && m_hasBeginWS;
+ endWS = m_hasEndWS;
+
+ beginMinW = m_beginMinWidth;
+ endMinW = m_endMinWidth;
+
+ hasBreakableChar = m_hasBreakableChar;
+ hasBreak = m_hasBreak;
+
+ if (stripFrontSpaces && ((*m_text)[0] == ' ' || ((*m_text)[0] == '\n' && !style()->preserveNewline()) || (*m_text)[0] == '\t')) {
+ const Font& f = style()->font(); // FIXME: This ignores first-line.
+ const UChar space = ' ';
+ int spaceWidth = f.width(TextRun(&space, 1));
+ maxW -= spaceWidth + f.wordSpacing();
+ }
+
+ stripFrontSpaces = collapseWhiteSpace && m_hasEndWS;
+
+ if (!style()->autoWrap() || minW > maxW)
+ minW = maxW;
+
+ // Compute our max widths by scanning the string for newlines.
+ if (hasBreak) {
+ const Font& f = style()->font(); // FIXME: This ignores first-line.
+ bool firstLine = true;
+ beginMaxW = maxW;
+ endMaxW = maxW;
+ for (int i = 0; i < len; i++) {
+ int linelen = 0;
+ while (i + linelen < len && (*m_text)[i + linelen] != '\n')
+ linelen++;
+
+ if (linelen) {
+ endMaxW = widthFromCache(f, i, linelen, leadWidth + endMaxW);
+ if (firstLine) {
+ firstLine = false;
+ leadWidth = 0;
+ beginMaxW = endMaxW;
+ }
+ i += linelen;
+ } else if (firstLine) {
+ beginMaxW = 0;
+ firstLine = false;
+ leadWidth = 0;
+ }
+
+ if (i == len - 1)
+ // A <pre> run that ends with a newline, as in, e.g.,
+ // <pre>Some text\n\n<span>More text</pre>
+ endMaxW = 0;
+ }
+ }
+}
+
+static inline bool isSpaceAccordingToStyle(UChar c, RenderStyle* style)
+{
+ return c == ' ' || (c == noBreakSpace && style->nbspMode() == SPACE);
+}
+
+int RenderText::minPrefWidth() const
+{
+ if (prefWidthsDirty())
+ const_cast<RenderText*>(this)->calcPrefWidths(0);
+
+ return m_minWidth;
+}
+
+int RenderText::maxPrefWidth() const
+{
+ if (prefWidthsDirty())
+ const_cast<RenderText*>(this)->calcPrefWidths(0);
+
+ return m_maxWidth;
+}
+
+void RenderText::calcPrefWidths(int leadWidth)
+{
+ ASSERT(m_hasTab || prefWidthsDirty());
+
+ m_minWidth = 0;
+ m_beginMinWidth = 0;
+ m_endMinWidth = 0;
+ m_maxWidth = 0;
+
+ if (isBR())
+ return;
+
+ int currMinWidth = 0;
+ int currMaxWidth = 0;
+ m_hasBreakableChar = false;
+ m_hasBreak = false;
+ m_hasTab = false;
+ m_hasBeginWS = false;
+ m_hasEndWS = false;
+
+ const Font& f = style()->font(); // FIXME: This ignores first-line.
+ int wordSpacing = style()->wordSpacing();
+ int len = textLength();
+ const UChar* txt = characters();
+ bool needsWordSpacing = false;
+ bool ignoringSpaces = false;
+ bool isSpace = false;
+ bool firstWord = true;
+ bool firstLine = true;
+ int nextBreakable = -1;
+ int lastWordBoundary = 0;
+
+ bool breakNBSP = style()->autoWrap() && style()->nbspMode() == SPACE;
+ bool breakAll = (style()->wordBreak() == BreakAllWordBreak || style()->wordBreak() == BreakWordBreak) && style()->autoWrap();
+
+ for (int i = 0; i < len; i++) {
+ UChar c = txt[i];
+
+ bool previousCharacterIsSpace = isSpace;
+
+ bool isNewline = false;
+ if (c == '\n') {
+ if (style()->preserveNewline()) {
+ m_hasBreak = true;
+ isNewline = true;
+ isSpace = false;
+ } else
+ isSpace = true;
+ } else if (c == '\t') {
+ if (!style()->collapseWhiteSpace()) {
+ m_hasTab = true;
+ isSpace = false;
+ } else
+ isSpace = true;
+ } else
+ isSpace = c == ' ';
+
+ if ((isSpace || isNewline) && !i)
+ m_hasBeginWS = true;
+ if ((isSpace || isNewline) && i == len - 1)
+ m_hasEndWS = true;
+
+ if (!ignoringSpaces && style()->collapseWhiteSpace() && previousCharacterIsSpace && isSpace)
+ ignoringSpaces = true;
+
+ if (ignoringSpaces && !isSpace)
+ ignoringSpaces = false;
+
+ // Ignore spaces and soft hyphens
+ if (ignoringSpaces || c == softHyphen) {
+ ASSERT(lastWordBoundary == i);
+ lastWordBoundary++;
+ continue;
+ }
+
+ bool hasBreak = breakAll || isBreakable(txt, i, len, nextBreakable, breakNBSP);
+ bool betweenWords = true;
+ int j = i;
+ while (c != '\n' && !isSpaceAccordingToStyle(c, style()) && c != '\t' && c != softHyphen) {
+ j++;
+ if (j == len)
+ break;
+ c = txt[j];
+ if (isBreakable(txt, j, len, nextBreakable, breakNBSP))
+ break;
+ if (breakAll) {
+ betweenWords = false;
+ break;
+ }
+ }
+
+ int wordLen = j - i;
+ if (wordLen) {
+ int w = widthFromCache(f, i, wordLen, leadWidth + currMaxWidth);
+ currMinWidth += w;
+ if (betweenWords) {
+ if (lastWordBoundary == i)
+ currMaxWidth += w;
+ else
+ currMaxWidth += widthFromCache(f, lastWordBoundary, j - lastWordBoundary, leadWidth + currMaxWidth);
+ lastWordBoundary = j;
+ }
+
+ bool isSpace = (j < len) && isSpaceAccordingToStyle(c, style());
+ bool isCollapsibleWhiteSpace = (j < len) && style()->isCollapsibleWhiteSpace(c);
+ if (j < len && style()->autoWrap())
+ m_hasBreakableChar = true;
+
+ // Add in wordSpacing to our currMaxWidth, but not if this is the last word on a line or the
+ // last word in the run.
+ if (wordSpacing && (isSpace || isCollapsibleWhiteSpace) && !containsOnlyWhitespace(j, len-j))
+ currMaxWidth += wordSpacing;
+
+ if (firstWord) {
+ firstWord = false;
+ // If the first character in the run is breakable, then we consider ourselves to have a beginning
+ // minimum width of 0, since a break could occur right before our run starts, preventing us from ever
+ // being appended to a previous text run when considering the total minimum width of the containing block.
+ if (hasBreak)
+ m_hasBreakableChar = true;
+ m_beginMinWidth = hasBreak ? 0 : w;
+ }
+ m_endMinWidth = w;
+
+ if (currMinWidth > m_minWidth)
+ m_minWidth = currMinWidth;
+ currMinWidth = 0;
+
+ i += wordLen - 1;
+ } else {
+ // Nowrap can never be broken, so don't bother setting the
+ // breakable character boolean. Pre can only be broken if we encounter a newline.
+ if (style()->autoWrap() || isNewline)
+ m_hasBreakableChar = true;
+
+ if (currMinWidth > m_minWidth)
+ m_minWidth = currMinWidth;
+ currMinWidth = 0;
+
+ if (isNewline) { // Only set if preserveNewline was true and we saw a newline.
+ if (firstLine) {
+ firstLine = false;
+ leadWidth = 0;
+ if (!style()->autoWrap())
+ m_beginMinWidth = currMaxWidth;
+ }
+
+ if (currMaxWidth > m_maxWidth)
+ m_maxWidth = currMaxWidth;
+ currMaxWidth = 0;
+ } else {
+ currMaxWidth += f.width(TextRun(txt + i, 1), TextStyle(allowTabs(), leadWidth + currMaxWidth));
+ needsWordSpacing = isSpace && !previousCharacterIsSpace && i == len - 1;
+ }
+ ASSERT(lastWordBoundary == i);
+ lastWordBoundary++;
+ }
+ }
+
+ if (needsWordSpacing && len > 1)
+ currMaxWidth += wordSpacing;
+
+ m_minWidth = max(currMinWidth, m_minWidth);
+ m_maxWidth = max(currMaxWidth, m_maxWidth);
+
+ if (!style()->autoWrap())
+ m_minWidth = m_maxWidth;
+
+ if (style()->whiteSpace() == PRE) {
+ if (firstLine)
+ m_beginMinWidth = m_maxWidth;
+ m_endMinWidth = currMaxWidth;
+ }
+
+ setPrefWidthsDirty(false);
+}
+
+bool RenderText::containsOnlyWhitespace(unsigned from, unsigned len) const
+{
+ unsigned currPos;
+ for (currPos = from;
+ currPos < from + len && ((*m_text)[currPos] == '\n' || (*m_text)[currPos] == ' ' || (*m_text)[currPos] == '\t');
+ currPos++);
+ return currPos >= (from + len);
+}
+
+int RenderText::minXPos() const
+{
+ if (!m_firstTextBox)
+ return 0;
+
+ // FIXME: we should not use an arbitrary value like this. Perhaps we should use INT_MAX.
+ int minXPos = 6666666;
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())
+ minXPos = min(minXPos, static_cast<int>(box->m_x));
+ return minXPos;
+}
+
+int RenderText::xPos() const
+{
+ return m_firstTextBox ? m_firstTextBox->m_x : 0;
+}
+
+int RenderText::yPos() const
+{
+ return m_firstTextBox ? m_firstTextBox->m_y : 0;
+}
+
+void RenderText::setSelectionState(SelectionState state)
+{
+ InlineTextBox* box;
+
+ m_selectionState = state;
+ if (state == SelectionStart || state == SelectionEnd || state == SelectionBoth) {
+ int startPos, endPos;
+ selectionStartEnd(startPos, endPos);
+ if (selectionState() == SelectionStart) {
+ endPos = textLength();
+
+ // to handle selection from end of text to end of line
+ if (startPos != 0 && startPos == endPos)
+ startPos = endPos - 1;
+ } else if (selectionState() == SelectionEnd)
+ startPos = 0;
+
+ for (box = firstTextBox(); box; box = box->nextTextBox()) {
+ if (box->isSelected(startPos, endPos)) {
+ RootInlineBox* line = box->root();
+ if (line)
+ line->setHasSelectedChildren(true);
+ }
+ }
+ } else {
+ for (box = firstTextBox(); box; box = box->nextTextBox()) {
+ RootInlineBox* line = box->root();
+ if (line)
+ line->setHasSelectedChildren(state == SelectionInside);
+ }
+ }
+
+ containingBlock()->setSelectionState(state);
+}
+
+void RenderText::setTextWithOffset(PassRefPtr<StringImpl> text, unsigned offset, unsigned len, bool force)
+{
+ unsigned oldLen = textLength();
+ unsigned newLen = text->length();
+ int delta = newLen - oldLen;
+ unsigned end = len ? offset + len - 1 : offset;
+
+ RootInlineBox* firstRootBox = 0;
+ RootInlineBox* lastRootBox = 0;
+
+ bool dirtiedLines = false;
+
+ // Dirty all text boxes that include characters in between offset and offset+len.
+ for (InlineTextBox* curr = firstTextBox(); curr; curr = curr->nextTextBox()) {
+ // Text run is entirely before the affected range.
+ if (curr->end() < offset)
+ continue;
+
+ // Text run is entirely after the affected range.
+ if (curr->start() > end) {
+ curr->offsetRun(delta);
+ RootInlineBox* root = curr->root();
+ if (!firstRootBox) {
+ firstRootBox = root;
+ if (!dirtiedLines) {
+ // The affected area was in between two runs. Go ahead and mark the root box of
+ // the run after the affected area as dirty.
+ firstRootBox->markDirty();
+ dirtiedLines = true;
+ }
+ }
+ lastRootBox = root;
+ } else if (curr->end() >= offset && curr->end() <= end) {
+ // Text run overlaps with the left end of the affected range.
+ curr->dirtyLineBoxes();
+ dirtiedLines = true;
+ } else if (curr->start() <= offset && curr->end() >= end) {
+ // Text run subsumes the affected range.
+ curr->dirtyLineBoxes();
+ dirtiedLines = true;
+ } else if (curr->start() <= end && curr->end() >= end) {
+ // Text run overlaps with right end of the affected range.
+ curr->dirtyLineBoxes();
+ dirtiedLines = true;
+ }
+ }
+
+ // Now we have to walk all of the clean lines and adjust their cached line break information
+ // to reflect our updated offsets.
+ if (lastRootBox)
+ lastRootBox = lastRootBox->nextRootBox();
+ if (firstRootBox) {
+ RootInlineBox* prev = firstRootBox->prevRootBox();
+ if (prev)
+ firstRootBox = prev;
+ }
+ for (RootInlineBox* curr = firstRootBox; curr && curr != lastRootBox; curr = curr->nextRootBox()) {
+ if (curr->lineBreakObj() == this && curr->lineBreakPos() > end)
+ curr->setLineBreakPos(curr->lineBreakPos() + delta);
+ }
+
+ m_linesDirty = dirtiedLines;
+ setText(text, force);
+}
+
+static inline bool isInlineFlowOrEmptyText(RenderObject* o)
+{
+ if (o->isInlineFlow())
+ return true;
+ if (!o->isText())
+ return false;
+ StringImpl* text = static_cast<RenderText*>(o)->text();
+ if (!text)
+ return true;
+ return !text->length();
+}
+
+UChar RenderText::previousCharacter()
+{
+ // find previous text renderer if one exists
+ RenderObject* previousText = this;
+ while ((previousText = previousText->previousInPreOrder()))
+ if (!isInlineFlowOrEmptyText(previousText))
+ break;
+ UChar prev = ' ';
+ if (previousText && previousText->isText())
+ if (StringImpl* previousString = static_cast<RenderText*>(previousText)->text())
+ prev = (*previousString)[previousString->length() - 1];
+ return prev;
+}
+
+void RenderText::setTextInternal(PassRefPtr<StringImpl> text)
+{
+ m_text = text;
+ ASSERT(m_text);
+
+ m_text = m_text->replace('\\', backslashAsCurrencySymbol());
+
+#if ENABLE(SVG)
+ if (isSVGText()) {
+ if (style() && style()->whiteSpace() == PRE) {
+ // Spec: When xml:space="preserve", the SVG user agent will do the following using a
+ // copy of the original character data content. It will convert all newline and tab
+ // characters into space characters. Then, it will draw all space characters, including
+ // leading, trailing and multiple contiguous space characters.
+
+ m_text = m_text->replace('\n', ' ');
+
+ // If xml:space="preserve" is set, white-space is set to "pre", which
+ // preserves leading, trailing & contiguous space character for us.
+ } else {
+ // Spec: When xml:space="default", the SVG user agent will do the following using a
+ // copy of the original character data content. First, it will remove all newline
+ // characters. Then it will convert all tab characters into space characters.
+ // Then, it will strip off all leading and trailing space characters.
+ // Then, all contiguous space characters will be consolidated.
+
+ static StringImpl empty("", 0);
+ m_text = m_text->replace('\n', &empty);
+
+ // If xml:space="default" is set, white-space is set to "nowrap", which handles
+ // leading, trailing & contiguous space character removal for us.
+ }
+
+ m_text = m_text->replace('\t', ' ');
+ }
+#endif
+
+ if (style()) {
+ switch (style()->textTransform()) {
+ case TTNONE:
+ break;
+ case CAPITALIZE: {
+ m_text = m_text->capitalize(previousCharacter());
+ break;
+ }
+ case UPPERCASE:
+ m_text = m_text->upper();
+ break;
+ case LOWERCASE:
+ m_text = m_text->lower();
+ break;
+ }
+
+#if PLATFORM(SYMBIAN)
+
+ // We use the same characters here as for list markers.
+ // See the listMarkerText function in RenderListMarker.cpp.
+ switch (style()->textSecurity()) {
+ case TSNONE:
+ break;
+ case TSCIRCLE:
+ m_text = m_text->secureShowLast(whiteBullet);
+ break;
+ case TSDISC:
+ m_text = m_text->secureShowLast(bullet);
+ break;
+ case TSSQUARE:
+ m_text = m_text->secureShowLast(blackSquare);
+ }
+
+ if (style()->textSecurity() != TSNONE) {
+ m_securityTimer.stop();
+ m_securityTimer.startOneShot(KSecureTimerTimeout);
+ }
+
+#else
+
+ switch (style()->textSecurity()) {
+ case TSNONE:
+ break;
+ case TSCIRCLE:
+ m_text = m_text->secure(whiteBullet);
+ break;
+ case TSDISC:
+ m_text = m_text->secure(bullet);
+ break;
+ case TSSQUARE:
+ m_text = m_text->secure(blackSquare);
+ }
+
+#endif
+
+ }
+
+ ASSERT(m_text);
+ ASSERT(!isBR() || (textLength() == 1 && (*m_text)[0] == '\n'));
+
+ m_isAllASCII = charactersAreAllASCII(m_text.get());
+}
+
+void RenderText::setText(PassRefPtr<StringImpl> text, bool force)
+{
+ ASSERT(text);
+
+ if (!force && equal(m_text.get(), text.get()))
+ return;
+
+ setTextInternal(text);
+ setNeedsLayoutAndPrefWidthsRecalc();
+}
+
+int RenderText::height() const
+{
+ int retval = 0;
+ if (firstTextBox())
+ retval = lastTextBox()->m_y + lastTextBox()->height() - firstTextBox()->m_y;
+ return retval;
+}
+
+short RenderText::lineHeight(bool firstLine, bool) const
+{
+ // Always use the interior line height of the parent (e.g., if our parent is an inline block).
+ return parent()->lineHeight(firstLine, true);
+}
+
+void RenderText::dirtyLineBoxes(bool fullLayout, bool)
+{
+ if (fullLayout)
+ deleteTextBoxes();
+ else if (!m_linesDirty) {
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())
+ box->dirtyLineBoxes();
+ }
+ m_linesDirty = false;
+}
+
+InlineTextBox* RenderText::createInlineTextBox()
+{
+ return new (renderArena()) InlineTextBox(this);
+}
+
+InlineBox* RenderText::createInlineBox(bool, bool isRootLineBox, bool)
+{
+ ASSERT(!isRootLineBox);
+ InlineTextBox* textBox = createInlineTextBox();
+ if (!m_firstTextBox)
+ m_firstTextBox = m_lastTextBox = textBox;
+ else {
+ m_lastTextBox->setNextLineBox(textBox);
+ textBox->setPreviousLineBox(m_lastTextBox);
+ m_lastTextBox = textBox;
+ }
+ return textBox;
+}
+
+void RenderText::position(InlineBox* box)
+{
+ InlineTextBox* s = static_cast<InlineTextBox*>(box);
+
+ // FIXME: should not be needed!!!
+ if (!s->m_len) {
+ // We want the box to be destroyed.
+ s->remove();
+ s->destroy(renderArena());
+ m_firstTextBox = m_lastTextBox = 0;
+ return;
+ }
+
+ m_containsReversedText |= s->m_reversed;
+}
+
+unsigned int RenderText::width(unsigned int from, unsigned int len, int xPos, bool firstLine) const
+{
+ if (from >= textLength())
+ return 0;
+
+ if (from + len > textLength())
+ len = textLength() - from;
+
+ return width(from, len, style(firstLine)->font(), xPos);
+}
+
+unsigned int RenderText::width(unsigned int from, unsigned int len, const Font& f, int xPos) const
+{
+ if (!characters() || from > textLength())
+ return 0;
+
+ if (from + len > textLength())
+ len = textLength() - from;
+
+ int w;
+ if (&f == &style()->font()) {
+ if (!style()->preserveNewline() && !from && len == textLength())
+ w = maxPrefWidth();
+ else
+ w = widthFromCache(f, from, len, xPos);
+ } else
+ w = f.width(TextRun(text()->characters() + from, len), TextStyle(allowTabs(), xPos));
+
+ return w;
+}
+
+int RenderText::width() const
+{
+ // FIXME: we should not use an arbitrary value like this. Perhaps we should use INT_MAX.
+ int minx = 100000000;
+ int maxx = 0;
+ // slooow
+ for (InlineTextBox* s = firstTextBox(); s; s = s->nextTextBox()) {
+ if (s->m_x < minx)
+ minx = s->m_x;
+ if (s->m_x + s->m_width > maxx)
+ maxx = s->m_x + s->m_width;
+ }
+
+ return max(0, maxx - minx);
+}
+
+IntRect RenderText::absoluteClippedOverflowRect()
+{
+ RenderObject* cb = containingBlock();
+ return cb->absoluteClippedOverflowRect();
+}
+
+IntRect RenderText::selectionRect(bool clipToVisibleContent)
+{
+ ASSERT(!needsLayout());
+
+ IntRect rect;
+ if (selectionState() == SelectionNone)
+ return rect;
+ RenderBlock* cb = containingBlock();
+ if (!cb)
+ return rect;
+
+ // Now calculate startPos and endPos for painting selection.
+ // We include a selection while endPos > 0
+ int startPos, endPos;
+ if (selectionState() == SelectionInside) {
+ // We are fully selected.
+ startPos = 0;
+ endPos = textLength();
+ } else {
+ selectionStartEnd(startPos, endPos);
+ if (selectionState() == SelectionStart)
+ endPos = textLength();
+ else if (selectionState() == SelectionEnd)
+ startPos = 0;
+ }
+
+ if (startPos == endPos)
+ return rect;
+
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())
+ rect.unite(box->selectionRect(0, 0, startPos, endPos));
+
+ if (clipToVisibleContent)
+ computeAbsoluteRepaintRect(rect);
+ else {
+ if (cb->hasColumns())
+ cb->adjustRectForColumns(rect);
+ int absx, absy;
+ absolutePosition(absx, absy);
+ rect.move(absx, absy);
+ }
+
+ return rect;
+}
+
+short RenderText::verticalPositionHint(bool firstLine) const
+{
+ if (parent()->isReplaced())
+ return 0; // Treat inline blocks just like blocks. There can't be any vertical position hint.
+ return parent()->verticalPositionHint(firstLine);
+}
+
+int RenderText::caretMinOffset() const
+{
+ InlineTextBox* box = firstTextBox();
+ if (!box)
+ return 0;
+ int minOffset = box->m_start;
+ for (box = box->nextTextBox(); box; box = box->nextTextBox())
+ minOffset = min(minOffset, box->m_start);
+ return minOffset;
+}
+
+int RenderText::caretMaxOffset() const
+{
+ InlineTextBox* box = lastTextBox();
+ if (!box)
+ return textLength();
+ int maxOffset = box->m_start + box->m_len;
+ for (box = box->prevTextBox(); box; box = box->prevTextBox())
+ maxOffset = max(maxOffset, box->m_start + box->m_len);
+ return maxOffset;
+}
+
+unsigned RenderText::caretMaxRenderedOffset() const
+{
+ int l = 0;
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())
+ l += box->m_len;
+ return l;
+}
+
+int RenderText::previousOffset(int current) const
+{
+ StringImpl* si = m_text.get();
+ TextBreakIterator* iterator = characterBreakIterator(si->characters(), si->length());
+ if (!iterator)
+ return current - 1;
+
+ long result = textBreakPreceding(iterator, current);
+ if (result == TextBreakDone)
+ result = current - 1;
+
+ return result;
+}
+
+int RenderText::nextOffset(int current) const
+{
+ StringImpl* si = m_text.get();
+ TextBreakIterator* iterator = characterBreakIterator(si->characters(), si->length());
+ if (!iterator)
+ return current + 1;
+
+ long result = textBreakFollowing(iterator, current);
+ if (result == TextBreakDone)
+ result = current + 1;
+
+ return result;
+}
+
+InlineBox* RenderText::inlineBox(int offset, EAffinity affinity)
+{
+ for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
+ if (box->containsCaretOffset(offset)) {
+ if (atLineWrap(box, offset) && affinity == DOWNSTREAM)
+ return box->nextTextBox();
+ return box;
+ }
+ if (offset < box->m_start)
+ // The offset we're looking for is before this node
+ // this means the offset must be in content that is
+ // not rendered.
+ return box->prevTextBox() ? box->prevTextBox() : firstTextBox();
+ }
+
+ return 0;
+}
+
+#ifndef NDEBUG
+
+void RenderText::checkConsistency() const
+{
+#ifdef CHECK_CONSISTENCY
+ const InlineTextBox* prev = 0;
+ for (const InlineTextBox* child = m_firstTextBox; child != 0; child = child->nextTextBox()) {
+ ASSERT(child->object() == this);
+ ASSERT(child->prevTextBox() == prev);
+ prev = child;
+ }
+ ASSERT(prev == m_lastTextBox);
+#endif
+}
+
+#endif
+
+#if PLATFORM(SYMBIAN)
+
+void RenderText::securityTimerFired(Timer<RenderText>*)
+{
+ switch (style()->textSecurity()) {
+ case TSCIRCLE:
+ m_text = m_text->secure(whiteBullet);
+ break;
+ case TSDISC:
+ m_text = m_text->secure(bullet);
+ break;
+ case TSSQUARE:
+ m_text = m_text->secure(blackSquare);
+ }
+ setNeedsLayoutAndPrefWidthsRecalc();
+}
+
+#endif
+
+} // namespace WebCore