/* * (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. * * 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 "InlineTextBox.h" #include "Document.h" #include "Editor.h" #include "Frame.h" #include "GraphicsContext.h" #include "HitTestResult.h" #include "RenderArena.h" #include "RenderBlock.h" #include "RenderTheme.h" #include "Text.h" #include "break_lines.h" #include using namespace std; namespace WebCore { int InlineTextBox::selectionTop() { return root()->selectionTop(); } int InlineTextBox::selectionHeight() { return root()->selectionHeight(); } bool InlineTextBox::isSelected(int startPos, int endPos) const { int sPos = max(startPos - m_start, 0); int ePos = min(endPos - m_start, (int)m_len); return (sPos < ePos); } RenderObject::SelectionState InlineTextBox::selectionState() { RenderObject::SelectionState state = object()->selectionState(); if (state == RenderObject::SelectionStart || state == RenderObject::SelectionEnd || state == RenderObject::SelectionBoth) { int startPos, endPos; object()->selectionStartEnd(startPos, endPos); // The position after a hard line break is considered to be past its end. int lastSelectable = start() + len() - (isLineBreak() ? 1 : 0); bool start = (state != RenderObject::SelectionEnd && startPos >= m_start && startPos < m_start + m_len); bool end = (state != RenderObject::SelectionStart && endPos > m_start && endPos <= lastSelectable); if (start && end) state = RenderObject::SelectionBoth; else if (start) state = RenderObject::SelectionStart; else if (end) state = RenderObject::SelectionEnd; else if ((state == RenderObject::SelectionEnd || startPos < m_start) && (state == RenderObject::SelectionStart || endPos > lastSelectable)) state = RenderObject::SelectionInside; else if (state == RenderObject::SelectionBoth) state = RenderObject::SelectionNone; } return state; } IntRect InlineTextBox::selectionRect(int tx, int ty, int startPos, int endPos) { int sPos = max(startPos - m_start, 0); int ePos = min(endPos - m_start, (int)m_len); if (sPos >= ePos) return IntRect(); RenderText* textObj = textObject(); int selTop = selectionTop(); int selHeight = selectionHeight(); const Font& f = textObj->style(m_firstLine)->font(); IntRect r = enclosingIntRect(f.selectionRectForText(TextRun(textObj->text()->characters() + m_start, m_len, textObj->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride), IntPoint(tx + m_x, ty + selTop), selHeight, sPos, ePos)); if (r.x() > tx + m_x + m_width) r.setWidth(0); else if (r.right() - 1 > tx + m_x + m_width) r.setWidth(tx + m_x + m_width - r.x()); return r; } void InlineTextBox::deleteLine(RenderArena* arena) { static_cast(m_object)->removeTextBox(this); destroy(arena); } void InlineTextBox::extractLine() { if (m_extracted) return; static_cast(m_object)->extractTextBox(this); } void InlineTextBox::attachLine() { if (!m_extracted) return; static_cast(m_object)->attachTextBox(this); } int InlineTextBox::placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox) { if (foundBox) { m_truncation = cFullTruncation; return -1; } int ellipsisX = ltr ? blockEdge - ellipsisWidth : blockEdge + ellipsisWidth; // For LTR, if the left edge of the ellipsis is to the left of our text run, then we are the run that will get truncated. if (ltr) { if (ellipsisX <= m_x) { // Too far. Just set full truncation, but return -1 and let the ellipsis just be placed at the edge of the box. m_truncation = cFullTruncation; foundBox = true; return -1; } if (ellipsisX < m_x + m_width) { if (m_reversed) return -1; // FIXME: Support LTR truncation when the last run is RTL someday. foundBox = true; int offset = offsetForPosition(ellipsisX, false); if (offset == 0) { // No characters should be rendered. Set ourselves to full truncation and place the ellipsis at the min of our start // and the ellipsis edge. m_truncation = cFullTruncation; return min(ellipsisX, m_x); } // Set the truncation index on the text run. The ellipsis needs to be placed just after the last visible character. m_truncation = offset; return m_x + static_cast(m_object)->width(m_start, offset, textPos(), m_firstLine); } } else { // FIXME: Support RTL truncation someday, including both modes (when the leftmost run on the line is either RTL or LTR) } return -1; } Color correctedTextColor(Color textColor, Color backgroundColor) { // Adjust the text color if it is too close to the background color, // by darkening or lightening it to move it further away. int d = differenceSquared(textColor, backgroundColor); // semi-arbitrarily chose 65025 (255^2) value here after a few tests; if (d > 65025) { return textColor; } int distanceFromWhite = differenceSquared(textColor, Color::white); int distanceFromBlack = differenceSquared(textColor, Color::black); if (distanceFromWhite < distanceFromBlack) { return textColor.dark(); } return textColor.light(); } void updateGraphicsContext(GraphicsContext* context, const Color& fillColor, const Color& strokeColor, float strokeThickness) { int mode = context->textDrawingMode(); if (strokeThickness > 0) { int newMode = mode | cTextStroke; if (mode != newMode) { context->setTextDrawingMode(newMode); mode = newMode; } } if (mode & cTextFill && fillColor != context->fillColor()) context->setFillColor(fillColor); if (mode & cTextStroke) { if (strokeColor != context->strokeColor()) context->setStrokeColor(strokeColor); if (strokeThickness != context->strokeThickness()) context->setStrokeThickness(strokeThickness); } } bool InlineTextBox::isLineBreak() const { return object()->isBR() || (object()->style()->preserveNewline() && len() == 1 && (*textObject()->text())[start()] == '\n'); } bool InlineTextBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty) { if (isLineBreak()) return false; IntRect rect(tx + m_x, ty + m_y, m_width, m_height); if (m_truncation != cFullTruncation && object()->style()->visibility() == VISIBLE && rect.contains(x, y)) { object()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); return true; } return false; } void InlineTextBox::paint(RenderObject::PaintInfo& paintInfo, int tx, int ty) { if (isLineBreak() || !object()->shouldPaintWithinRoot(paintInfo) || object()->style()->visibility() != VISIBLE || m_truncation == cFullTruncation || paintInfo.phase == PaintPhaseOutline) return; ASSERT(paintInfo.phase != PaintPhaseSelfOutline && paintInfo.phase != PaintPhaseChildOutlines); int xPos = tx + m_x - parent()->maxHorizontalVisualOverflow(); int w = width() + 2 * parent()->maxHorizontalVisualOverflow(); if (xPos >= paintInfo.rect.right() || xPos + w <= paintInfo.rect.x()) return; bool isPrinting = textObject()->document()->printing(); // Determine whether or not we're selected. bool haveSelection = !isPrinting && selectionState() != RenderObject::SelectionNone; if (!haveSelection && paintInfo.phase == PaintPhaseSelection) // When only painting the selection, don't bother to paint if there is none. return; // Determine whether or not we have composition underlines to draw. bool containsComposition = object()->document()->frame()->editor()->compositionNode() == object()->node(); bool useCustomUnderlines = containsComposition && object()->document()->frame()->editor()->compositionUsesCustomUnderlines(); // Set our font. RenderStyle* styleToUse = object()->style(m_firstLine); int d = styleToUse->textDecorationsInEffect(); const Font* font = &styleToUse->font(); if (*font != paintInfo.context->font()) paintInfo.context->setFont(*font); // 1. Paint backgrounds behind text if needed. Examples of such backgrounds include selection // and composition underlines. if (paintInfo.phase != PaintPhaseSelection && !isPrinting) { #if PLATFORM(MAC) // Custom highlighters go behind everything else. if (styleToUse->highlight() != nullAtom && !paintInfo.context->paintingDisabled()) paintCustomHighlight(tx, ty, styleToUse->highlight()); #endif if (containsComposition && !useCustomUnderlines) paintCompositionBackground(paintInfo.context, tx, ty, styleToUse, font, object()->document()->frame()->editor()->compositionStart(), object()->document()->frame()->editor()->compositionEnd()); paintDocumentMarkers(paintInfo.context, tx, ty, styleToUse, font, true); if (haveSelection && !useCustomUnderlines) paintSelection(paintInfo.context, tx, ty, styleToUse, font); } // 2. Now paint the foreground, including text and decorations like underline/overline (in quirks mode only). if (m_len <= 0) return; Color textFillColor; Color textStrokeColor; float textStrokeWidth = styleToUse->textStrokeWidth(); if (paintInfo.forceBlackText) { textFillColor = Color::black; textStrokeColor = Color::black; } else { textFillColor = styleToUse->textFillColor(); if (!textFillColor.isValid()) textFillColor = styleToUse->color(); // Make the text fill color legible against a white background if (styleToUse->forceBackgroundsToWhite()) textFillColor = correctedTextColor(textFillColor, Color::white); textStrokeColor = styleToUse->textStrokeColor(); if (!textStrokeColor.isValid()) textStrokeColor = styleToUse->color(); // Make the text stroke color legible against a white background if (styleToUse->forceBackgroundsToWhite()) textStrokeColor = correctedTextColor(textStrokeColor, Color::white); } // For stroked painting, we have to change the text drawing mode. It's probably dangerous to leave that mutated as a side // effect, so only when we know we're stroking, do a save/restore. if (textStrokeWidth > 0) paintInfo.context->save(); updateGraphicsContext(paintInfo.context, textFillColor, textStrokeColor, textStrokeWidth); // Set a text shadow if we have one. // FIXME: Support multiple shadow effects. Need more from the CG API before // we can do this. bool setShadow = false; if (styleToUse->textShadow()) { paintInfo.context->setShadow(IntSize(styleToUse->textShadow()->x, styleToUse->textShadow()->y), styleToUse->textShadow()->blur, styleToUse->textShadow()->color); setShadow = true; } bool paintSelectedTextOnly = (paintInfo.phase == PaintPhaseSelection); bool paintSelectedTextSeparately = false; // Whether or not we have to do multiple paints. Only // necessary when a custom ::selection foreground color is applied. Color selectionFillColor = textFillColor; Color selectionStrokeColor = textStrokeColor; float selectionStrokeWidth = textStrokeWidth; ShadowData* selectionTextShadow = 0; if (haveSelection) { // Check foreground color first. Color foreground = object()->selectionForegroundColor(); if (foreground.isValid() && foreground != selectionFillColor) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; selectionFillColor = foreground; } RenderStyle* pseudoStyle = object()->getPseudoStyle(RenderStyle::SELECTION); if (pseudoStyle) { if (pseudoStyle->textShadow()) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; if (pseudoStyle->textShadow()) selectionTextShadow = pseudoStyle->textShadow(); } float strokeWidth = pseudoStyle->textStrokeWidth(); if (strokeWidth != selectionStrokeWidth) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; selectionStrokeWidth = strokeWidth; } Color stroke = pseudoStyle->textStrokeColor(); if (!stroke.isValid()) stroke = pseudoStyle->color(); if (stroke != selectionStrokeColor) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; selectionStrokeColor = stroke; } } } StringImpl* textStr = textObject()->text(); if (!paintSelectedTextOnly && !paintSelectedTextSeparately) { // paint all the text // FIXME: Handle RTL direction, handle reversed strings. For now truncation can only be turned on // for non-reversed LTR strings. int endPoint = m_len; if (m_truncation != cNoTruncation) endPoint = m_truncation; paintInfo.context->drawText(TextRun(textStr->characters() + m_start, endPoint, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || styleToUse->visuallyOrdered()), IntPoint(m_x + tx, m_y + ty + m_baseline)); } else { int sPos, ePos; selectionStartEnd(sPos, ePos); if (paintSelectedTextSeparately) { // paint only the text that is not selected if (sPos >= ePos) paintInfo.context->drawText(TextRun(textStr->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || styleToUse->visuallyOrdered()), IntPoint(m_x + tx, m_y + ty + m_baseline)); else { if (sPos - 1 >= 0) paintInfo.context->drawText(TextRun(textStr->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || styleToUse->visuallyOrdered()), IntPoint(m_x + tx, m_y + ty + m_baseline), 0, sPos); if (ePos < m_start + m_len) paintInfo.context->drawText(TextRun(textStr->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || styleToUse->visuallyOrdered()), IntPoint(m_x + tx, m_y + ty + m_baseline), ePos); } } if (sPos < ePos) { // paint only the text that is selected if (selectionStrokeWidth > 0) paintInfo.context->save(); updateGraphicsContext(paintInfo.context, selectionFillColor, selectionStrokeColor, selectionStrokeWidth); if (selectionTextShadow) paintInfo.context->setShadow(IntSize(selectionTextShadow->x, selectionTextShadow->y), selectionTextShadow->blur, selectionTextShadow->color); paintInfo.context->drawText(TextRun(textStr->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || styleToUse->visuallyOrdered()), IntPoint(m_x + tx, m_y + ty + m_baseline), sPos, ePos); if (selectionTextShadow) paintInfo.context->clearShadow(); if (selectionStrokeWidth > 0) paintInfo.context->restore(); } } // Paint decorations if (d != TDNONE && paintInfo.phase != PaintPhaseSelection && styleToUse->htmlHacks()) { paintInfo.context->setStrokeColor(styleToUse->color()); paintDecoration(paintInfo.context, tx, ty, d); } if (paintInfo.phase != PaintPhaseSelection) { paintDocumentMarkers(paintInfo.context, tx, ty, styleToUse, font, false); if (useCustomUnderlines) { const Vector& underlines = object()->document()->frame()->editor()->customCompositionUnderlines(); size_t numUnderlines = underlines.size(); for (size_t index = 0; index < numUnderlines; ++index) { const CompositionUnderline& underline = underlines[index]; if (underline.endOffset <= start()) // underline is completely before this run. This might be an underline that sits // before the first run we draw, or underlines that were within runs we skipped // due to truncation. continue; if (underline.startOffset <= end()) { // underline intersects this run. Paint it. paintCompositionUnderline(paintInfo.context, tx, ty, underline); if (underline.endOffset > end() + 1) // underline also runs into the next run. Bail now, no more marker advancement. break; } else // underline is completely after this run, bail. A later run will paint it. break; } } } if (setShadow) paintInfo.context->clearShadow(); if (textStrokeWidth > 0) paintInfo.context->restore(); } void InlineTextBox::selectionStartEnd(int& sPos, int& ePos) { int startPos, endPos; if (object()->selectionState() == RenderObject::SelectionInside) { startPos = 0; endPos = textObject()->textLength(); } else { textObject()->selectionStartEnd(startPos, endPos); if (object()->selectionState() == RenderObject::SelectionStart) endPos = textObject()->textLength(); else if (object()->selectionState() == RenderObject::SelectionEnd) startPos = 0; } sPos = max(startPos - m_start, 0); ePos = min(endPos - m_start, (int)m_len); } void InlineTextBox::paintSelection(GraphicsContext* p, int tx, int ty, RenderStyle* style, const Font* f) { // See if we have a selection to paint at all. int sPos, ePos; selectionStartEnd(sPos, ePos); if (sPos >= ePos) return; Color textColor = style->color(); Color c = object()->selectionBackgroundColor(); if (!c.isValid() || c.alpha() == 0) return; // If the text color ends up being the same as the selection background, invert the selection // background. This should basically never happen, since the selection has transparency. if (textColor == c) c = Color(0xff - c.red(), 0xff - c.green(), 0xff - c.blue()); p->save(); updateGraphicsContext(p, c, c, 0); // Don't draw text at all! int y = selectionTop(); int h = selectionHeight(); p->clip(IntRect(m_x + tx, y + ty, m_width, h)); p->drawHighlightForText(TextRun(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered()), IntPoint(m_x + tx, y + ty), h, c, sPos, ePos); p->restore(); } void InlineTextBox::paintCompositionBackground(GraphicsContext* p, int tx, int ty, RenderStyle* style, const Font* f, int startPos, int endPos) { int offset = m_start; int sPos = max(startPos - offset, 0); int ePos = min(endPos - offset, (int)m_len); if (sPos >= ePos) return; p->save(); Color c = Color(225, 221, 85); updateGraphicsContext(p, c, c, 0); // Don't draw text at all! int y = selectionTop(); int h = selectionHeight(); p->drawHighlightForText(TextRun(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered()), IntPoint(m_x + tx, y + ty), h, c, sPos, ePos); p->restore(); } #if PLATFORM(MAC) void InlineTextBox::paintCustomHighlight(int tx, int ty, const AtomicString& type) { RootInlineBox* r = root(); FloatRect rootRect(tx + r->xPos(), ty + selectionTop(), r->width(), selectionHeight()); FloatRect textRect(tx + xPos(), rootRect.y(), width(), rootRect.height()); object()->document()->frame()->paintCustomHighlight(type, textRect, rootRect, true, false, object()->node()); } #endif void InlineTextBox::paintDecoration(GraphicsContext* context, int tx, int ty, int deco) { tx += m_x; ty += m_y; if (m_truncation == cFullTruncation) return; int width = (m_truncation == cNoTruncation) ? m_width : static_cast(m_object)->width(m_start, m_truncation, textPos(), m_firstLine); // Get the text decoration colors. Color underline, overline, linethrough; object()->getTextDecorationColors(deco, underline, overline, linethrough, true); // Use a special function for underlines to get the positioning exactly right. bool isPrinting = textObject()->document()->printing(); context->setStrokeThickness(1.0f); // FIXME: We should improve this rule and not always just assume 1. if (deco & UNDERLINE) { context->setStrokeColor(underline); // Leave one pixel of white between the baseline and the underline. context->drawLineForText(IntPoint(tx, ty + m_baseline + 1), width, isPrinting); } if (deco & OVERLINE) { context->setStrokeColor(overline); context->drawLineForText(IntPoint(tx, ty), width, isPrinting); } if (deco & LINE_THROUGH) { context->setStrokeColor(linethrough); context->drawLineForText(IntPoint(tx, ty + 2 * m_baseline / 3), width, isPrinting); } } void InlineTextBox::paintSpellingOrGrammarMarker(GraphicsContext* pt, int tx, int ty, DocumentMarker marker, RenderStyle* style, const Font* f, bool grammar) { // Never print spelling/grammar markers (5327887) if (textObject()->document()->printing()) return; if (m_truncation == cFullTruncation) return; tx += m_x; ty += m_y; int start = 0; // start of line to draw, relative to tx int width = m_width; // how much line to draw bool useWholeWidth = true; unsigned paintStart = m_start; unsigned paintEnd = end()+1; // end points at the last char, not past it if (paintStart <= marker.startOffset) { paintStart = marker.startOffset; useWholeWidth = false; start = static_cast(m_object)->width(m_start, paintStart - m_start, textPos(), m_firstLine); } if (paintEnd != marker.endOffset) { // end points at the last char, not past it paintEnd = min(paintEnd, marker.endOffset); useWholeWidth = false; } if (m_truncation != cNoTruncation) { paintEnd = min(paintEnd, (unsigned)m_start + m_truncation); useWholeWidth = false; } if (!useWholeWidth) { width = static_cast(m_object)->width(paintStart, paintEnd - paintStart, textPos() + start, m_firstLine); } // Store rendered rects for bad grammar markers, so we can hit-test against it elsewhere in order to // display a toolTip. We don't do this for misspelling markers. if (grammar) { int y = selectionTop(); IntPoint startPoint = IntPoint(m_x + tx, y + ty); int startPosition = max(marker.startOffset - m_start, (unsigned)0); int endPosition = min(marker.endOffset - m_start, (unsigned)m_len); TextRun run(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered()); IntRect markerRect = enclosingIntRect(f->selectionRectForText(run, startPoint, selectionHeight(), startPosition, endPosition)); object()->document()->setRenderedRectForMarker(object()->node(), marker, markerRect); } // IMPORTANT: The misspelling underline is not considered when calculating the text bounds, so we have to // make sure to fit within those bounds. This means the top pixel(s) of the underline will overlap the // bottom pixel(s) of the glyphs in smaller font sizes. The alternatives are to increase the line spacing (bad!!) // or decrease the underline thickness. The overlap is actually the most useful, and matches what AppKit does. // So, we generally place the underline at the bottom of the text, but in larger fonts that's not so good so // we pin to two pixels under the baseline. int lineThickness = cMisspellingLineThickness; int descent = m_height - m_baseline; int underlineOffset; if (descent <= (2 + lineThickness)) { // place the underline at the very bottom of the text in small/medium fonts underlineOffset = m_height - lineThickness; } else { // in larger fonts, tho, place the underline up near the baseline to prevent big gap underlineOffset = m_baseline + 2; } pt->drawLineForMisspellingOrBadGrammar(IntPoint(tx + start, ty + underlineOffset), width, grammar); } void InlineTextBox::paintTextMatchMarker(GraphicsContext* pt, int tx, int ty, DocumentMarker marker, RenderStyle* style, const Font* f) { // Use same y positioning and height as for selection, so that when the selection and this highlight are on // the same word there are no pieces sticking out. int y = selectionTop(); int h = selectionHeight(); int sPos = max(marker.startOffset - m_start, (unsigned)0); int ePos = min(marker.endOffset - m_start, (unsigned)m_len); TextRun run(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered()); IntPoint startPoint = IntPoint(m_x + tx, y + ty); // Always compute and store the rect associated with this marker IntRect markerRect = enclosingIntRect(f->selectionRectForText(run, startPoint, h, sPos, ePos)); object()->document()->setRenderedRectForMarker(object()->node(), marker, markerRect); // Optionally highlight the text if (object()->document()->frame()->markedTextMatchesAreHighlighted()) { Color color = theme()->platformTextSearchHighlightColor(); pt->save(); updateGraphicsContext(pt, color, color, 0); // Don't draw text at all! pt->clip(IntRect(tx + m_x, ty + y, m_width, h)); pt->drawHighlightForText(run, startPoint, h, color, sPos, ePos); pt->restore(); } } void InlineTextBox::paintDocumentMarkers(GraphicsContext* pt, int tx, int ty, RenderStyle* style, const Font* f, bool background) { Vector markers = object()->document()->markersForNode(object()->node()); Vector::iterator markerIt = markers.begin(); // Give any document markers that touch this run a chance to draw before the text has been drawn. // Note end() points at the last char, not one past it like endOffset and ranges do. for ( ; markerIt != markers.end(); markerIt++) { DocumentMarker marker = *markerIt; // Paint either the background markers or the foreground markers, but not both switch (marker.type) { case DocumentMarker::Grammar: case DocumentMarker::Spelling: if (background) continue; break; case DocumentMarker::TextMatch: if (!background) continue; break; default: ASSERT_NOT_REACHED(); } if (marker.endOffset <= start()) // marker is completely before this run. This might be a marker that sits before the // first run we draw, or markers that were within runs we skipped due to truncation. continue; if (marker.startOffset > end()) // marker is completely after this run, bail. A later run will paint it. break; // marker intersects this run. Paint it. switch (marker.type) { case DocumentMarker::Spelling: paintSpellingOrGrammarMarker(pt, tx, ty, marker, style, f, false); break; case DocumentMarker::Grammar: paintSpellingOrGrammarMarker(pt, tx, ty, marker, style, f, true); break; case DocumentMarker::TextMatch: paintTextMatchMarker(pt, tx, ty, marker, style, f); break; default: ASSERT_NOT_REACHED(); } if (marker.endOffset > end() + 1) // marker also runs into the next run. Bail now, no more marker advancement. break; } } void InlineTextBox::paintCompositionUnderline(GraphicsContext* ctx, int tx, int ty, const CompositionUnderline& underline) { tx += m_x; ty += m_y; if (m_truncation == cFullTruncation) return; int start = 0; // start of line to draw, relative to tx int width = m_width; // how much line to draw bool useWholeWidth = true; unsigned paintStart = m_start; unsigned paintEnd = end() + 1; // end points at the last char, not past it if (paintStart <= underline.startOffset) { paintStart = underline.startOffset; useWholeWidth = false; start = static_cast(m_object)->width(m_start, paintStart - m_start, textPos(), m_firstLine); } if (paintEnd != underline.endOffset) { // end points at the last char, not past it paintEnd = min(paintEnd, (unsigned)underline.endOffset); useWholeWidth = false; } if (m_truncation != cNoTruncation) { paintEnd = min(paintEnd, (unsigned)m_start + m_truncation); useWholeWidth = false; } if (!useWholeWidth) { width = static_cast(m_object)->width(paintStart, paintEnd - paintStart, textPos() + start, m_firstLine); } // Thick marked text underlines are 2px thick as long as there is room for the 2px line under the baseline. // All other marked text underlines are 1px thick. // If there's not enough space the underline will touch or overlap characters. int lineThickness = 1; if (underline.thick && m_height - m_baseline >= 2) lineThickness = 2; ctx->setStrokeColor(underline.color); ctx->setStrokeThickness(lineThickness); ctx->drawLineForText(IntPoint(tx + start, ty + m_height - lineThickness), width, textObject()->document()->printing()); } int InlineTextBox::caretMinOffset() const { return m_start; } int InlineTextBox::caretMaxOffset() const { return m_start + m_len; } unsigned InlineTextBox::caretMaxRenderedOffset() const { return m_start + m_len; } int InlineTextBox::textPos() const { if (xPos() == 0) return 0; RenderBlock *blockElement = object()->containingBlock(); return m_reversed ? xPos() - blockElement->borderRight() - blockElement->paddingRight() : xPos() - blockElement->borderLeft() - blockElement->paddingLeft(); } int InlineTextBox::offsetForPosition(int _x, bool includePartialGlyphs) const { if (isLineBreak()) return 0; RenderText* text = static_cast(m_object); RenderStyle *style = text->style(m_firstLine); const Font* f = &style->font(); return f->offsetForPosition(TextRun(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered()), _x - m_x, includePartialGlyphs); } int InlineTextBox::positionForOffset(int offset) const { if (isLineBreak()) return m_x; RenderText* text = static_cast(m_object); const Font& f = text->style(m_firstLine)->font(); int from = m_reversed ? offset - m_start : 0; int to = m_reversed ? m_len : offset - m_start; // FIXME: Do we need to add rightBearing here? return enclosingIntRect(f.selectionRectForText(TextRun(text->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride), IntPoint(m_x, 0), 0, from, to)).right(); } bool InlineTextBox::containsCaretOffset(int offset) const { // Offsets before the box are never "in". if (offset < m_start) return false; int pastEnd = m_start + m_len; // Offsets inside the box (not at either edge) are always "in". if (offset < pastEnd) return true; // Offsets outside the box are always "out". if (offset > pastEnd) return false; // Offsets at the end are "out" for line breaks (they are on the next line). if (isLineBreak()) return false; // Offsets at the end are "in" for normal boxes (but the caller has to check affinity). return true; } } // namespace WebCore