| /** |
| * This file is part of the DOM implementation for KDE. |
| * |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007 Apple Computer, Inc. |
| * 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., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "RenderText.h" |
| |
| #include "InlineTextBox.h" |
| #include "Range.h" |
| #include "RenderArena.h" |
| #include "RenderBlock.h" |
| #include "RenderLayer.h" |
| #include "TextBreakIterator.h" |
| #include "TextStyle.h" |
| #include "break_lines.h" |
| #include <wtf/AlwaysInline.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| RenderText::RenderText(Node* node, StringImpl* str) |
| : RenderObject(node) |
| , m_str(str) |
| , m_firstTextBox(0) |
| , m_lastTextBox(0) |
| , m_minWidth(-1) |
| , m_maxWidth(-1) |
| , m_selectionState(SelectionNone) |
| , m_linesDirty(false) |
| , m_containsReversedText(false) |
| , m_allAsciiChecked(false) |
| , m_allAscii(false) |
| , m_monospaceCharacterWidth(0) |
| { |
| setRenderText(); |
| if (m_str) |
| m_str = m_str->replace('\\', backslashAsCurrencySymbol()); |
| ASSERT(!m_str || !m_str->length() || m_str->characters()); |
| } |
| |
| 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 (RefPtr<StringImpl> textToTransform = originalString()) |
| setText(textToTransform.release(), true); |
| |
| cacheWidths(); |
| } |
| |
| 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) |
| { |
| 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(); |
| } |
| |
| void RenderText::attachTextBox(InlineTextBox* box) |
| { |
| 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; |
| } |
| |
| void RenderText::removeTextBox(InlineTextBox* box) |
| { |
| 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()); |
| } |
| |
| void RenderText::deleteTextBoxes() |
| { |
| if (firstTextBox()) { |
| RenderArena* arena = renderArena(); |
| InlineTextBox *curr = firstTextBox(), *next = 0; |
| while (curr) { |
| next = curr->nextTextBox(); |
| curr->destroy(arena); |
| curr = next; |
| } |
| m_firstTextBox = m_lastTextBox = 0; |
| } |
| } |
| |
| PassRefPtr<StringImpl> RenderText::originalString() const |
| { |
| return element() ? element()->string() : 0; |
| } |
| |
| void RenderText::absoluteRects(Vector<IntRect>& rects, int tx, int ty) |
| { |
| 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) |
| { |
| 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 { |
| IntRect r = box->selectionRect(x, y, start, end); |
| if (!r.isEmpty()) { |
| // 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_str |
| // (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() || stringLength() == 0) |
| return VisiblePosition(element(), 0, DOWNSTREAM); |
| |
| int absx, absy; |
| RenderBlock* cb = containingBlock(); |
| cb->absolutePositionForContent(absx, absy); |
| if (cb->hasOverflowClip()) |
| cb->layer()->subtractScrollOffset(absx, absy); |
| |
| // 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 < absy + firstTextBox()->root()->bottomOverflow() && x < absx + 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 - absx); |
| return VisiblePosition(element(), offset + firstTextBox()->m_start, DOWNSTREAM); |
| } |
| if (lastTextBox() && y >= absy + lastTextBox()->root()->topOverflow() && x >= absx + 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 - absx); |
| return VisiblePosition(element(), offset + lastTextBox()->m_start, DOWNSTREAM); |
| } |
| |
| InlineTextBox* lastBoxAbove = 0; |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) { |
| if (y >= absy + box->root()->topOverflow()) { |
| if (y < absy + box->root()->bottomOverflow()) { |
| offset = box->offsetForPosition(x - absx); |
| |
| if (x == absx + 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 < absx + 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 < absx + 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); |
| } |
| |
| #if __GNUC__ |
| static RenderObject* firstRendererOnNextLine(InlineBox* box) __attribute__ ((unused)); |
| #endif |
| static RenderObject* firstRendererOnNextLine(InlineBox* box) |
| { |
| if (!box) |
| return 0; |
| |
| RootInlineBox* root = box->root(); |
| if (!root) |
| return 0; |
| |
| if (root->endsWithBreak()) |
| return 0; |
| |
| RootInlineBox* nextRoot = root->nextRootBox(); |
| if (!nextRoot) |
| return 0; |
| |
| InlineBox* firstChild = nextRoot->firstChild(); |
| if (!firstChild) |
| return 0; |
| |
| return firstChild->object(); |
| } |
| |
| 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() || !stringLength()) |
| 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); |
| } |
| |
| void RenderText::posOfChar(int chr, int& x, int& y) |
| { |
| absolutePositionForContent(x, y); |
| |
| int pos; |
| if (InlineTextBox* s = findNextInlineTextBox(chr, pos)) { |
| // s is the line containing the character |
| x += s->m_x; // this is the x of the beginning of the line, but it's good enough for now |
| y += s->m_y; |
| } |
| } |
| |
| bool RenderText::allAscii() const |
| { |
| if (m_allAsciiChecked) |
| return m_allAscii; |
| m_allAsciiChecked = true; |
| |
| unsigned i; |
| for (i = 0; i < m_str->length(); i++) { |
| if ((*m_str)[i] > 0x7f) { |
| m_allAscii = false; |
| return m_allAscii; |
| } |
| } |
| |
| m_allAscii = true; |
| |
| return m_allAscii; |
| } |
| |
| bool RenderText::shouldUseMonospaceCache(const Font* f) const |
| { |
| return (f && f->isFixedPitch() && allAscii() && !style()->font().isSmallCaps()); |
| } |
| |
| // We cache the width of the ' ' character for <pre> text. We could go further |
| // and cache a widths array for all styles, at the expense of increasing the size of the |
| // RenderText. |
| void RenderText::cacheWidths() |
| { |
| const Font* f = font(false); |
| if (shouldUseMonospaceCache(f)) { |
| const UChar c = ' '; |
| m_monospaceCharacterWidth = f->width(TextRun(&c, 1)); |
| } else |
| m_monospaceCharacterWidth = 0; |
| } |
| |
| ALWAYS_INLINE int RenderText::widthFromCache(const Font* f, int start, int len, int tabWidth, int xPos) const |
| { |
| if (m_monospaceCharacterWidth) { |
| int i; |
| int w = 0; |
| for (i = start; i < start + len; i++) { |
| UChar c = (*m_str)[i]; |
| WTF::Unicode::Direction dir = WTF::Unicode::direction(c); |
| if (dir != WTF::Unicode::NonSpacingMark && dir != WTF::Unicode::BoundaryNeutral) { |
| if (c == '\t' && tabWidth) |
| w += tabWidth - ((xPos + w) % tabWidth); |
| else |
| w += m_monospaceCharacterWidth; |
| if (DeprecatedChar(c).isSpace() && i > start && !DeprecatedChar((*m_str)[i - 1]).isSpace()) |
| w += f->wordSpacing(); |
| } |
| } |
| |
| return w; |
| } |
| |
| return f->width(TextRun(string(), start, len, 0), TextStyle(tabWidth, xPos)); |
| } |
| |
| void RenderText::trimmedMinMaxWidth(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; |
| |
| int len = m_str->length(); |
| if (!len || (stripFrontSpaces && m_str->containsOnlyWhitespace())) { |
| maxW = 0; |
| hasBreak = false; |
| return; |
| } |
| |
| if (m_hasTab) |
| calcMinMaxWidth(leadWidth); |
| |
| 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_str)[0] == ' ' || ((*m_str)[0] == '\n' && !style()->preserveNewline()) || (*m_str)[0] == '\t')) { |
| const Font* f = font(false); // FIXME: Why is it ok to ignore first-line here? |
| 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 = font(false); |
| bool firstLine = true; |
| beginMaxW = maxW; |
| endMaxW = maxW; |
| for (int i = 0; i < len; i++) { |
| int linelen = 0; |
| while (i + linelen < len && (*m_str)[i + linelen] != '\n') |
| linelen++; |
| |
| if (linelen) { |
| endMaxW = widthFromCache(f, i, linelen, tabWidth(), 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; |
| } |
| } |
| } |
| |
| void RenderText::calcMinMaxWidth() |
| { |
| // Use 0 for the leadWidth. If the text contains a variable width tab, the real width |
| // will get measured when trimmedMinMaxWidth calls again with the real leadWidth. |
| ASSERT(!minMaxKnown()); |
| calcMinMaxWidth(0); |
| } |
| |
| inline bool isSpaceAccordingToStyle(UChar c, RenderStyle* style) |
| { |
| return c == ' ' || (c == 0xa0 && style->nbspMode() == SPACE); |
| } |
| |
| void RenderText::calcMinMaxWidth(int leadWidth) |
| { |
| // FIXME: calc Min and Max width... |
| 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; |
| |
| // FIXME: not 100% correct for first-line |
| const Font* f = font(false); |
| int wordSpacing = style()->wordSpacing(); |
| int len = m_str->length(); |
| const UChar* txt = m_str->characters(); |
| bool needsWordSpacing = false; |
| bool ignoringSpaces = false; |
| bool isSpace = false; |
| bool firstWord = true; |
| bool firstLine = true; |
| int nextBreakable = -1; |
| bool breakNBSP = style()->autoWrap() && style()->nbspMode() == SPACE; |
| |
| 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 == SOFT_HYPHEN) |
| continue; |
| |
| bool hasBreak = isBreakable(txt, i, len, nextBreakable, breakNBSP); |
| int j = i; |
| while (c != '\n' && !isSpaceAccordingToStyle(c, style()) && c != '\t' && c != SOFT_HYPHEN) { |
| j++; |
| if (j == len) |
| break; |
| c = txt[j]; |
| if (isBreakable(txt, j, len, nextBreakable, breakNBSP)) |
| break; |
| } |
| |
| int wordLen = j - i; |
| if (wordLen) { |
| int w = widthFromCache(f, i, wordLen, tabWidth(), leadWidth + currMaxWidth); |
| currMinWidth += w; |
| currMaxWidth += w; |
| |
| 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; |
| m_beginMinWidth = currMaxWidth; |
| } |
| |
| if (currMaxWidth > m_maxWidth) |
| m_maxWidth = currMaxWidth; |
| currMaxWidth = 0; |
| } else { |
| currMaxWidth += f->width(TextRun(txt + i, 1), TextStyle(tabWidth(), leadWidth + currMaxWidth)); |
| needsWordSpacing = isSpace && !previousCharacterIsSpace && i == len - 1; |
| } |
| } |
| } |
| |
| 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) { |
| // FIXME: pre-wrap and pre-line need to be dealt with possibly? This code won't be right |
| // for them though. |
| if (firstLine) |
| m_beginMinWidth = m_maxWidth; |
| m_endMinWidth = currMaxWidth; |
| } |
| |
| setMinMaxKnown(); |
| } |
| |
| bool RenderText::containsOnlyWhitespace(unsigned from, unsigned len) const |
| { |
| unsigned currPos; |
| for (currPos = from; |
| currPos < from + len && ((*m_str)[currPos] == '\n' || (*m_str)[currPos] == ' ' || (*m_str)[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; |
| } |
| |
| const Font& RenderText::font() |
| { |
| return style()->font(); |
| } |
| |
| 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 = m_str->length(); |
| |
| // 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 = m_str ? m_str->length() : 0; |
| unsigned newLen = text ? text->length() : 0; |
| 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* string = static_cast<RenderText*>(o)->string(); |
| if (!string) |
| return true; |
| return string->length() == 0; |
| } |
| |
| void RenderText::setInternalString(PassRefPtr<StringImpl> text) |
| { |
| m_allAsciiChecked = false; |
| |
| m_str = text; |
| |
| if (m_str) { |
| m_str = m_str->replace('\\', backslashAsCurrencySymbol()); |
| if (style()) { |
| switch (style()->textTransform()) { |
| case TTNONE: |
| break; |
| case CAPITALIZE: { |
| // find previous text renderer if one exists |
| RenderObject* previousText = this; |
| while ((previousText = previousText->previousInPreOrder())) |
| if (!isInlineFlowOrEmptyText(previousText)) |
| break; |
| UChar previousCharacter = ' '; |
| if (previousText && previousText->isText()) |
| if (StringImpl* previousString = static_cast<RenderText*>(previousText)->string()) |
| previousCharacter = (*previousString)[previousString->length() - 1]; |
| m_str = m_str->capitalize(previousCharacter); |
| break; |
| } |
| case UPPERCASE: |
| m_str = m_str->upper(); |
| break; |
| case LOWERCASE: |
| m_str = m_str->lower(); |
| break; |
| } |
| |
| // 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: { |
| const UChar whiteBullet = 0x25E6; |
| m_str = m_str->secure(whiteBullet); |
| break; |
| } |
| case TSDISC: { |
| const UChar bullet = 0x2022; |
| m_str = m_str->secure(bullet); |
| break; |
| } |
| case TSSQUARE: { |
| const UChar blackSquare = 0x25A0; |
| m_str = m_str->secure(blackSquare); |
| break; |
| } |
| } |
| } |
| } |
| |
| ASSERT(!isBR() || (m_str->length() == 1 && (*m_str)[0] == '\n')); |
| ASSERT(!m_str->length() || m_str->characters()); |
| } |
| |
| void RenderText::setText(PassRefPtr<StringImpl> text, bool force) |
| { |
| if (!text) |
| return; |
| if (!force && equal(m_str.get(), text.get())) |
| return; |
| |
| setInternalString(text); |
| setNeedsLayoutAndMinMaxRecalc(); |
| } |
| |
| 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; |
| } |
| |
| InlineBox* RenderText::createInlineBox(bool, bool isRootLineBox, bool) |
| { |
| ASSERT(!isRootLineBox); |
| InlineTextBox* textBox = new (renderArena()) InlineTextBox(this); |
| 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 >= m_str->length()) |
| return 0; |
| |
| if (from + len > m_str->length()) |
| len = m_str->length() - from; |
| |
| const Font* f = font(firstLine); |
| return width(from, len, f, xPos); |
| } |
| |
| unsigned int RenderText::width(unsigned int from, unsigned int len, const Font* f, int xPos) const |
| { |
| if (!m_str->characters() || from > m_str->length()) |
| return 0; |
| |
| if (from + len > m_str->length()) |
| len = m_str->length() - from; |
| |
| int w; |
| if (!style()->preserveNewline() && f == &style()->font() && !from && len == m_str->length()) |
| w = m_maxWidth; |
| else if (f == &style()->font()) |
| w = widthFromCache(f, from, len, tabWidth(), xPos); |
| else |
| w = f->width(TextRun(string(), from, len, 0), TextStyle(tabWidth(), 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::getAbsoluteRepaintRect() |
| { |
| RenderObject* cb = containingBlock(); |
| return cb->getAbsoluteRepaintRect(); |
| } |
| |
| IntRect RenderText::selectionRect() |
| { |
| 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 = m_str->length(); |
| } else { |
| selectionStartEnd(startPos, endPos); |
| if (selectionState() == SelectionStart) |
| endPos = m_str->length(); |
| else if (selectionState() == SelectionEnd) |
| startPos = 0; |
| } |
| |
| if (startPos == endPos) |
| return rect; |
| |
| int absx, absy; |
| cb->absolutePositionForContent(absx, absy); |
| RenderLayer* layer = cb->layer(); |
| if (layer) |
| layer->subtractScrollOffset(absx, absy); |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) |
| rect.unite(box->selectionRect(absx, absy, startPos, endPos)); |
| |
| return rect; |
| } |
| |
| short RenderText::verticalPositionHint(bool firstLine) const |
| { |
| return parent()->verticalPositionHint(firstLine); |
| } |
| |
| const Font* RenderText::font(bool firstLine) const |
| { |
| return &style(firstLine)->font(); |
| } |
| |
| 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 m_str->length(); |
| 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_str.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_str.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; |
| } |
| |
| } // namespace WebCore |
