/* * (C) 1999 Lars Knoll (knoll@kde.org) * (C) 2000 Dirk Mueller (mueller@kde.org) * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 "Chrome.h" #include "ChromeClient.h" #include "Document.h" #include "Editor.h" #include "EllipsisBox.h" #include "Frame.h" #include "GraphicsContext.h" #include "HitTestResult.h" #include "Page.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::baselinePosition(FontBaseline baselineType) const { if (!isText() || !parent()) return 0; return parent()->baselinePosition(baselineType); } int InlineTextBox::lineHeight() const { if (!isText() || !parent()) return 0; if (m_renderer->isBR()) return toRenderBR(m_renderer)->lineHeight(m_firstLine); return parent()->lineHeight(); } int InlineTextBox::selectionTop() { return root()->selectionTop(); } int InlineTextBox::selectionBottom() { return root()->selectionBottom(); } 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 = renderer()->selectionState(); if (state == RenderObject::SelectionStart || state == RenderObject::SelectionEnd || state == RenderObject::SelectionBoth) { int startPos, endPos; renderer()->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; } // If there are ellipsis following, make sure their selection is updated. if (m_truncation != cNoTruncation && root()->ellipsisBox()) { EllipsisBox* ellipsis = root()->ellipsisBox(); if (state != RenderObject::SelectionNone) { int start, end; selectionStartEnd(start, end); // The ellipsis should be considered to be selected if the end of // the selection is past the beginning of the truncation and the // beginning of the selection is before or at the beginning of the // truncation. ellipsis->setSelectionState(end >= m_truncation && start <= m_truncation ? RenderObject::SelectionInside : RenderObject::SelectionNone); } else ellipsis->setSelectionState(RenderObject::SelectionNone); } return state; } typedef Vector BufferForAppendingHyphen; static void adjustCharactersAndLengthForHyphen(BufferForAppendingHyphen& charactersWithHyphen, RenderStyle* style, const UChar*& characters, int& length) { const AtomicString& hyphenString = style->hyphenString(); charactersWithHyphen.reserveCapacity(length + hyphenString.length()); charactersWithHyphen.append(characters, length); charactersWithHyphen.append(hyphenString.characters(), hyphenString.length()); characters = charactersWithHyphen.data(); length += hyphenString.length(); } 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 = textRenderer(); int selTop = selectionTop(); int selHeight = selectionHeight(); RenderStyle* styleToUse = textObj->style(m_firstLine); const Font& f = styleToUse->font(); const UChar* characters = textObj->text()->characters() + m_start; int len = m_len; BufferForAppendingHyphen charactersWithHyphen; if (ePos == len && hasHyphen()) { adjustCharactersAndLengthForHyphen(charactersWithHyphen, styleToUse, characters, len); ePos = len; } IntRect r = enclosingIntRect(f.selectionRectForText(TextRun(characters, len, textObj->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride), IntPoint(), selHeight, sPos, ePos)); int logicalWidth = r.width(); if (r.x() > m_logicalWidth) logicalWidth = 0; else if (r.right() > m_logicalWidth) logicalWidth = m_logicalWidth - r.x(); IntPoint topPoint = isHorizontal() ? IntPoint(tx + m_x + r.x(), ty + selTop) : IntPoint(tx + selTop, ty + m_y + r.x()); int width = isHorizontal() ? logicalWidth : selHeight; int height = isHorizontal() ? selHeight : logicalWidth; return IntRect(topPoint, IntSize(width, height)); } void InlineTextBox::deleteLine(RenderArena* arena) { toRenderText(renderer())->removeTextBox(this); destroy(arena); } void InlineTextBox::extractLine() { if (m_extracted) return; toRenderText(renderer())->extractTextBox(this); } void InlineTextBox::attachLine() { if (!m_extracted) return; toRenderText(renderer())->attachTextBox(this); } int InlineTextBox::placeEllipsisBox(bool flowIsLTR, int visibleLeftEdge, int visibleRightEdge, int ellipsisWidth, bool& foundBox) { if (foundBox) { m_truncation = cFullTruncation; return -1; } // For LTR this is the left edge of the box, for RTL, the right edge in parent coordinates. int ellipsisX = flowIsLTR ? visibleRightEdge - ellipsisWidth : visibleLeftEdge + ellipsisWidth; // Criteria for full truncation: // LTR: the left edge of the ellipsis is to the left of our text run. // RTL: the right edge of the ellipsis is to the right of our text run. bool ltrFullTruncation = flowIsLTR && ellipsisX <= m_x; bool rtlFullTruncation = !flowIsLTR && ellipsisX >= (m_x + m_logicalWidth); if (ltrFullTruncation || rtlFullTruncation) { // 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; } bool ltrEllipsisWithinBox = flowIsLTR && (ellipsisX < m_x + m_logicalWidth); bool rtlEllipsisWithinBox = !flowIsLTR && (ellipsisX > m_x); if (ltrEllipsisWithinBox || rtlEllipsisWithinBox) { foundBox = true; // The inline box may have different directionality than it's parent. Since truncation // behavior depends both on both the parent and the inline block's directionality, we // must keep track of these separately. bool ltr = isLeftToRightDirection(); if (ltr != flowIsLTR) { // Width in pixels of the visible portion of the box, excluding the ellipsis. int visibleBoxWidth = visibleRightEdge - visibleLeftEdge - ellipsisWidth; ellipsisX = ltr ? m_x + visibleBoxWidth : m_x + m_logicalWidth - visibleBoxWidth; } 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. m_truncation = offset; // If we got here that means that we were only partially truncated and we need to return the pixel offset at which // to place the ellipsis. int widthOfVisibleText = toRenderText(renderer())->width(m_start, offset, textPos(), m_firstLine); // The ellipsis needs to be placed just after the last visible character. // Where "after" is defined by the flow directionality, not the inline // box directionality. // e.g. In the case of an LTR inline box truncated in an RTL flow then we can // have a situation such as |Hello| -> |...He| if (flowIsLTR) return m_x + widthOfVisibleText; else return (m_x + m_logicalWidth) - widthOfVisibleText - ellipsisWidth; } 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, ColorSpace colorSpace) { 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() || colorSpace != context->fillColorSpace())) context->setFillColor(fillColor, colorSpace); if (mode & cTextStroke) { if (strokeColor != context->strokeColor()) context->setStrokeColor(strokeColor, colorSpace); if (strokeThickness != context->strokeThickness()) context->setStrokeThickness(strokeThickness); } } bool InlineTextBox::isLineBreak() const { return renderer()->isBR() || (renderer()->style()->preserveNewline() && len() == 1 && (*textRenderer()->text())[start()] == '\n'); } bool InlineTextBox::nodeAtPoint(const HitTestRequest&, HitTestResult& result, int x, int y, int tx, int ty) { if (isLineBreak()) return false; IntPoint boxOrigin = locationIncludingFlipping(); boxOrigin.move(tx, ty); IntRect rect(boxOrigin, IntSize(width(), height())); if (m_truncation != cFullTruncation && visibleToHitTesting() && rect.intersects(result.rectForPoint(x, y))) { renderer()->updateHitTestResult(result, flipForWritingMode(IntPoint(x - tx, y - ty))); if (!result.addNodeToRectBasedTestResult(renderer()->node(), x, y, rect)) return true; } return false; } FloatSize InlineTextBox::applyShadowToGraphicsContext(GraphicsContext* context, const ShadowData* shadow, const FloatRect& textRect, bool stroked, bool opaque, bool horizontal) { if (!shadow) return FloatSize(); FloatSize extraOffset; int shadowX = horizontal ? shadow->x() : shadow->y(); int shadowY = horizontal ? shadow->y() : -shadow->x(); FloatSize shadowOffset(shadowX, shadowY); int shadowBlur = shadow->blur(); const Color& shadowColor = shadow->color(); if (shadow->next() || stroked || !opaque) { FloatRect shadowRect(textRect); shadowRect.inflate(shadowBlur); shadowRect.move(shadowOffset); context->save(); context->clip(shadowRect); extraOffset = FloatSize(0, 2 * textRect.height() + max(0.0f, shadowOffset.height()) + shadowBlur); shadowOffset -= extraOffset; } context->setShadow(shadowOffset, shadowBlur, shadowColor, context->fillColorSpace()); return extraOffset; } static void paintTextWithShadows(GraphicsContext* context, const Font& font, const TextRun& textRun, int startOffset, int endOffset, int truncationPoint, const IntPoint& textOrigin, const IntRect& boxRect, const ShadowData* shadow, bool stroked, bool horizontal) { Color fillColor = context->fillColor(); ColorSpace fillColorSpace = context->fillColorSpace(); bool opaque = fillColor.alpha() == 255; if (!opaque) context->setFillColor(Color::black, fillColorSpace); do { IntSize extraOffset; if (shadow) extraOffset = roundedIntSize(InlineTextBox::applyShadowToGraphicsContext(context, shadow, boxRect, stroked, opaque, horizontal)); else if (!opaque) context->setFillColor(fillColor, fillColorSpace); if (startOffset <= endOffset) context->drawText(font, textRun, textOrigin + extraOffset, startOffset, endOffset); else { if (endOffset > 0) context->drawText(font, textRun, textOrigin + extraOffset, 0, endOffset); if (startOffset < truncationPoint) context->drawText(font, textRun, textOrigin + extraOffset, startOffset, truncationPoint); } if (!shadow) break; if (shadow->next() || stroked || !opaque) context->restore(); else context->clearShadow(); shadow = shadow->next(); } while (shadow || stroked || !opaque); } void InlineTextBox::paint(PaintInfo& paintInfo, int tx, int ty) { if (isLineBreak() || !paintInfo.shouldPaintWithinRoot(renderer()) || renderer()->style()->visibility() != VISIBLE || m_truncation == cFullTruncation || paintInfo.phase == PaintPhaseOutline || !m_len) return; ASSERT(paintInfo.phase != PaintPhaseSelfOutline && paintInfo.phase != PaintPhaseChildOutlines); // FIXME: Technically we're potentially incorporating other visual overflow that had nothing to do with us. // Would it be simpler to just check our own shadow and stroke overflow by hand here? int logicalLeftOverflow = parent()->logicalLeft() - parent()->logicalLeftVisualOverflow(); int logicalRightOverflow = parent()->logicalRightVisualOverflow() - (parent()->logicalLeft() + parent()->logicalWidth()); int logicalStart = logicalLeft() - logicalLeftOverflow + (isHorizontal() ? tx : ty); int logicalExtent = logicalWidth() + logicalLeftOverflow + logicalRightOverflow; int paintEnd = isHorizontal() ? paintInfo.rect.right() : paintInfo.rect.bottom(); int paintStart = isHorizontal() ? paintInfo.rect.x() : paintInfo.rect.y(); if (logicalStart >= paintEnd || logicalStart + logicalExtent <= paintStart) return; bool isPrinting = textRenderer()->document()->printing(); // Determine whether or not we're selected. bool haveSelection = !isPrinting && paintInfo.phase != PaintPhaseTextClip && selectionState() != RenderObject::SelectionNone; if (!haveSelection && paintInfo.phase == PaintPhaseSelection) // When only painting the selection, don't bother to paint if there is none. return; if (m_truncation != cNoTruncation) { if (renderer()->containingBlock()->style()->isLeftToRightDirection() != isLeftToRightDirection()) { // Make the visible fragment of text hug the edge closest to the rest of the run by moving the origin // at which we start drawing text. // e.g. In the case of LTR text truncated in an RTL Context, the correct behavior is: // |Hello|CBA| -> |...He|CBA| // In order to draw the fragment "He" aligned to the right edge of it's box, we need to start drawing // farther to the right. // NOTE: WebKit's behavior differs from that of IE which appears to just overlay the ellipsis on top of the // truncated string i.e. |Hello|CBA| -> |...lo|CBA| int widthOfVisibleText = toRenderText(renderer())->width(m_start, m_truncation, textPos(), m_firstLine); int widthOfHiddenText = m_logicalWidth - widthOfVisibleText; // FIXME: The hit testing logic also needs to take this translation int account. if (isHorizontal()) tx += isLeftToRightDirection() ? widthOfHiddenText : -widthOfHiddenText; else ty += isLeftToRightDirection() ? widthOfHiddenText : -widthOfHiddenText; } } GraphicsContext* context = paintInfo.context; RenderStyle* styleToUse = renderer()->style(m_firstLine); ty -= styleToUse->isHorizontalWritingMode() ? 0 : logicalHeight(); IntPoint boxOrigin = locationIncludingFlipping(); boxOrigin.move(tx, ty); IntRect boxRect(boxOrigin, IntSize(logicalWidth(), logicalHeight())); IntPoint textOrigin = IntPoint(boxOrigin.x(), boxOrigin.y() + styleToUse->font().ascent()); if (!isHorizontal()) { context->save(); context->translate(boxRect.x(), boxRect.bottom()); context->rotate(static_cast(deg2rad(90.))); context->translate(-boxRect.x(), -boxRect.bottom()); } // Determine whether or not we have composition underlines to draw. bool containsComposition = renderer()->node() && renderer()->frame()->editor()->compositionNode() == renderer()->node(); bool useCustomUnderlines = containsComposition && renderer()->frame()->editor()->compositionUsesCustomUnderlines(); // Set our font. int d = styleToUse->textDecorationsInEffect(); const Font& font = styleToUse->font(); // 1. Paint backgrounds behind text if needed. Examples of such backgrounds include selection // and composition underlines. if (paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseTextClip && !isPrinting) { #if PLATFORM(MAC) // Custom highlighters go behind everything else. if (styleToUse->highlight() != nullAtom && !context->paintingDisabled()) paintCustomHighlight(tx, ty, styleToUse->highlight()); #endif if (containsComposition && !useCustomUnderlines) paintCompositionBackground(context, boxOrigin, styleToUse, font, renderer()->frame()->editor()->compositionStart(), renderer()->frame()->editor()->compositionEnd()); paintDocumentMarkers(context, boxOrigin, styleToUse, font, true); if (haveSelection && !useCustomUnderlines) paintSelection(context, boxOrigin, styleToUse, font); } // 2. Now paint the foreground, including text and decorations like underline/overline (in quirks mode only). Color textFillColor; Color textStrokeColor; float textStrokeWidth = styleToUse->textStrokeWidth(); const ShadowData* textShadow = paintInfo.forceBlackText ? 0 : styleToUse->textShadow(); if (paintInfo.forceBlackText) { textFillColor = Color::black; textStrokeColor = Color::black; } else { textFillColor = styleToUse->visitedDependentColor(CSSPropertyWebkitTextFillColor); // Make the text fill color legible against a white background if (styleToUse->forceBackgroundsToWhite()) textFillColor = correctedTextColor(textFillColor, Color::white); textStrokeColor = styleToUse->visitedDependentColor(CSSPropertyWebkitTextStrokeColor); // Make the text stroke color legible against a white background if (styleToUse->forceBackgroundsToWhite()) textStrokeColor = correctedTextColor(textStrokeColor, Color::white); } bool paintSelectedTextOnly = (paintInfo.phase == PaintPhaseSelection); bool paintSelectedTextSeparately = false; Color selectionFillColor = textFillColor; Color selectionStrokeColor = textStrokeColor; float selectionStrokeWidth = textStrokeWidth; const ShadowData* selectionShadow = textShadow; if (haveSelection) { // Check foreground color first. Color foreground = paintInfo.forceBlackText ? Color::black : renderer()->selectionForegroundColor(); if (foreground.isValid() && foreground != selectionFillColor) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; selectionFillColor = foreground; } if (RenderStyle* pseudoStyle = renderer()->getCachedPseudoStyle(SELECTION)) { const ShadowData* shadow = paintInfo.forceBlackText ? 0 : pseudoStyle->textShadow(); if (shadow != selectionShadow) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; selectionShadow = shadow; } float strokeWidth = pseudoStyle->textStrokeWidth(); if (strokeWidth != selectionStrokeWidth) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; selectionStrokeWidth = strokeWidth; } Color stroke = paintInfo.forceBlackText ? Color::black : pseudoStyle->visitedDependentColor(CSSPropertyWebkitTextStrokeColor); if (stroke != selectionStrokeColor) { if (!paintSelectedTextOnly) paintSelectedTextSeparately = true; selectionStrokeColor = stroke; } } } const UChar* characters = textRenderer()->text()->characters() + m_start; int length = m_len; BufferForAppendingHyphen charactersWithHyphen; if (hasHyphen()) adjustCharactersAndLengthForHyphen(charactersWithHyphen, styleToUse, characters, length); TextRun textRun(characters, length, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride || styleToUse->visuallyOrdered()); int sPos = 0; int ePos = 0; if (paintSelectedTextOnly || paintSelectedTextSeparately) selectionStartEnd(sPos, ePos); if (m_truncation != cNoTruncation) { sPos = min(sPos, m_truncation); ePos = min(ePos, m_truncation); length = m_truncation; } if (!paintSelectedTextOnly) { // 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) context->save(); updateGraphicsContext(context, textFillColor, textStrokeColor, textStrokeWidth, styleToUse->colorSpace()); if (!paintSelectedTextSeparately || ePos <= sPos) { // FIXME: Truncate right-to-left text correctly. paintTextWithShadows(context, font, textRun, 0, length, length, textOrigin, boxRect, textShadow, textStrokeWidth > 0, isHorizontal()); } else paintTextWithShadows(context, font, textRun, ePos, sPos, length, textOrigin, boxRect, textShadow, textStrokeWidth > 0, isHorizontal()); if (textStrokeWidth > 0) context->restore(); } if ((paintSelectedTextOnly || paintSelectedTextSeparately) && sPos < ePos) { // paint only the text that is selected if (selectionStrokeWidth > 0) context->save(); updateGraphicsContext(context, selectionFillColor, selectionStrokeColor, selectionStrokeWidth, styleToUse->colorSpace()); paintTextWithShadows(context, font, textRun, sPos, ePos, length, textOrigin, boxRect, selectionShadow, selectionStrokeWidth > 0, isHorizontal()); if (selectionStrokeWidth > 0) context->restore(); } // Paint decorations if (d != TDNONE && paintInfo.phase != PaintPhaseSelection) { updateGraphicsContext(context, textFillColor, textStrokeColor, textStrokeWidth, styleToUse->colorSpace()); paintDecoration(context, boxOrigin, d, textShadow); } if (paintInfo.phase == PaintPhaseForeground) { paintDocumentMarkers(context, boxOrigin, styleToUse, font, false); if (useCustomUnderlines) { const Vector& underlines = renderer()->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(context, boxOrigin, 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 (!isHorizontal()) context->restore(); } void InlineTextBox::selectionStartEnd(int& sPos, int& ePos) { int startPos, endPos; if (renderer()->selectionState() == RenderObject::SelectionInside) { startPos = 0; endPos = textRenderer()->textLength(); } else { textRenderer()->selectionStartEnd(startPos, endPos); if (renderer()->selectionState() == RenderObject::SelectionStart) endPos = textRenderer()->textLength(); else if (renderer()->selectionState() == RenderObject::SelectionEnd) startPos = 0; } sPos = max(startPos - m_start, 0); ePos = min(endPos - m_start, (int)m_len); } void InlineTextBox::paintSelection(GraphicsContext* context, const IntPoint& boxOrigin, RenderStyle* style, const Font& font) { // See if we have a selection to paint at all. int sPos, ePos; selectionStartEnd(sPos, ePos); if (sPos >= ePos) return; Color textColor = style->visitedDependentColor(CSSPropertyColor); Color c = renderer()->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()); context->save(); updateGraphicsContext(context, c, c, 0, style->colorSpace()); // Don't draw text at all! // If the text is truncated, let the thing being painted in the truncation // draw its own highlight. int length = m_truncation != cNoTruncation ? m_truncation : m_len; const UChar* characters = textRenderer()->text()->characters() + m_start; BufferForAppendingHyphen charactersWithHyphen; if (ePos == length && hasHyphen()) { adjustCharactersAndLengthForHyphen(charactersWithHyphen, style, characters, length); ePos = length; } int deltaY = renderer()->style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop(); int selHeight = selectionHeight(); IntPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY); context->clip(IntRect(localOrigin, IntSize(m_logicalWidth, selHeight))); context->drawHighlightForText(font, TextRun(characters, length, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()), localOrigin, selHeight, c, style->colorSpace(), sPos, ePos); context->restore(); } void InlineTextBox::paintCompositionBackground(GraphicsContext* context, const IntPoint& boxOrigin, RenderStyle* style, const Font& font, 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; context->save(); Color c = Color(225, 221, 85); updateGraphicsContext(context, c, c, 0, style->colorSpace()); // Don't draw text at all! int deltaY = renderer()->style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop(); int selHeight = selectionHeight(); IntPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY); context->drawHighlightForText(font, TextRun(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()), localOrigin, selHeight, c, style->colorSpace(), sPos, ePos); context->restore(); } #if PLATFORM(MAC) void InlineTextBox::paintCustomHighlight(int tx, int ty, const AtomicString& type) { Frame* frame = renderer()->frame(); if (!frame) return; Page* page = frame->page(); if (!page) return; RootInlineBox* r = root(); FloatRect rootRect(tx + r->x(), ty + selectionTop(), r->logicalWidth(), selectionHeight()); FloatRect textRect(tx + x(), rootRect.y(), logicalWidth(), rootRect.height()); page->chrome()->client()->paintCustomHighlight(renderer()->node(), type, textRect, rootRect, true, false); } #endif void InlineTextBox::paintDecoration(GraphicsContext* context, const IntPoint& boxOrigin, int deco, const ShadowData* shadow) { if (m_truncation == cFullTruncation) return; IntPoint localOrigin = boxOrigin; int width = m_logicalWidth; if (m_truncation != cNoTruncation) { width = toRenderText(renderer())->width(m_start, m_truncation, textPos(), m_firstLine); if (!isLeftToRightDirection()) localOrigin.move(m_logicalWidth - width, 0); } // Get the text decoration colors. Color underline, overline, linethrough; renderer()->getTextDecorationColors(deco, underline, overline, linethrough, true); // Use a special function for underlines to get the positioning exactly right. bool isPrinting = textRenderer()->document()->printing(); context->setStrokeThickness(1.0f); // FIXME: We should improve this rule and not always just assume 1. bool linesAreOpaque = !isPrinting && (!(deco & UNDERLINE) || underline.alpha() == 255) && (!(deco & OVERLINE) || overline.alpha() == 255) && (!(deco & LINE_THROUGH) || linethrough.alpha() == 255); RenderStyle* styleToUse = renderer()->style(m_firstLine); int baseline = styleToUse->font().ascent(); bool setClip = false; int extraOffset = 0; if (!linesAreOpaque && shadow && shadow->next()) { context->save(); IntRect clipRect(localOrigin, IntSize(width, baseline + 2)); for (const ShadowData* s = shadow; s; s = s->next()) { IntRect shadowRect(localOrigin, IntSize(width, baseline + 2)); shadowRect.inflate(s->blur()); int shadowX = isHorizontal() ? s->x() : s->y(); int shadowY = isHorizontal() ? s->y() : -s->x(); shadowRect.move(shadowX, shadowY); clipRect.unite(shadowRect); extraOffset = max(extraOffset, max(0, shadowY) + s->blur()); } context->save(); context->clip(clipRect); extraOffset += baseline + 2; localOrigin.move(0, extraOffset); setClip = true; } ColorSpace colorSpace = renderer()->style()->colorSpace(); bool setShadow = false; do { if (shadow) { if (!shadow->next()) { // The last set of lines paints normally inside the clip. localOrigin.move(0, -extraOffset); extraOffset = 0; } int shadowX = isHorizontal() ? shadow->x() : shadow->y(); int shadowY = isHorizontal() ? shadow->y() : -shadow->x(); context->setShadow(IntSize(shadowX, shadowY - extraOffset), shadow->blur(), shadow->color(), colorSpace); setShadow = true; shadow = shadow->next(); } if (deco & UNDERLINE) { context->setStrokeColor(underline, colorSpace); context->setStrokeStyle(SolidStroke); // Leave one pixel of white between the baseline and the underline. context->drawLineForText(IntPoint(localOrigin.x(), localOrigin.y() + baseline + 1), width, isPrinting); } if (deco & OVERLINE) { context->setStrokeColor(overline, colorSpace); context->setStrokeStyle(SolidStroke); context->drawLineForText(localOrigin, width, isPrinting); } if (deco & LINE_THROUGH) { context->setStrokeColor(linethrough, colorSpace); context->setStrokeStyle(SolidStroke); context->drawLineForText(IntPoint(localOrigin.x(), localOrigin.y() + 2 * baseline / 3), width, isPrinting); } } while (shadow); if (setClip) context->restore(); else if (setShadow) context->clearShadow(); } static GraphicsContext::TextCheckingLineStyle textCheckingLineStyleForMarkerType(DocumentMarker::MarkerType markerType) { switch (markerType) { case DocumentMarker::Spelling: return GraphicsContext::TextCheckingSpellingLineStyle; case DocumentMarker::Grammar: return GraphicsContext::TextCheckingGrammarLineStyle; case DocumentMarker::CorrectionIndicator: return GraphicsContext::TextCheckingReplacementLineStyle; default: ASSERT_NOT_REACHED(); return GraphicsContext::TextCheckingSpellingLineStyle; } } void InlineTextBox::paintSpellingOrGrammarMarker(GraphicsContext* pt, const IntPoint& boxOrigin, const DocumentMarker& marker, RenderStyle* style, const Font& font, bool grammar) { // Never print spelling/grammar markers (5327887) if (textRenderer()->document()->printing()) return; if (m_truncation == cFullTruncation) return; int start = 0; // start of line to draw, relative to tx int width = m_logicalWidth; // how much line to draw // Determine whether we need to measure text bool markerSpansWholeBox = true; if (m_start <= (int)marker.startOffset) markerSpansWholeBox = false; if ((end() + 1) != marker.endOffset) // end points at the last char, not past it markerSpansWholeBox = false; if (m_truncation != cNoTruncation) markerSpansWholeBox = false; if (!markerSpansWholeBox || grammar) { int startPosition = max(marker.startOffset - m_start, 0); int endPosition = min(marker.endOffset - m_start, m_len); if (m_truncation != cNoTruncation) endPosition = min(endPosition, m_truncation); // Calculate start & width int deltaY = renderer()->style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop(); int selHeight = selectionHeight(); IntPoint startPoint(boxOrigin.x(), boxOrigin.y() - deltaY); TextRun run(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()); IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, startPoint, selHeight, startPosition, endPosition)); start = markerRect.x() - startPoint.x(); width = markerRect.width(); // 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) { markerRect.move(-boxOrigin.x(), -boxOrigin.y()); markerRect = renderer()->localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox(); renderer()->document()->markers()->setRenderedRectForMarker(renderer()->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 baseline = renderer()->style(m_firstLine)->font().ascent(); int descent = logicalHeight() - baseline; int underlineOffset; if (descent <= (2 + lineThickness)) { // Place the underline at the very bottom of the text in small/medium fonts. underlineOffset = logicalHeight() - lineThickness; } else { // In larger fonts, though, place the underline up near the baseline to prevent a big gap. underlineOffset = baseline + 2; } pt->drawLineForTextChecking(IntPoint(boxOrigin.x() + start, boxOrigin.y() + underlineOffset), width, textCheckingLineStyleForMarkerType(marker.type)); } void InlineTextBox::paintTextMatchMarker(GraphicsContext* pt, const IntPoint& boxOrigin, const DocumentMarker& marker, RenderStyle* style, const Font& font) { // 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 deltaY = renderer()->style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop(); int selHeight = selectionHeight(); int sPos = max(marker.startOffset - m_start, (unsigned)0); int ePos = min(marker.endOffset - m_start, (unsigned)m_len); TextRun run(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()); // Always compute and store the rect associated with this marker. The computed rect is in absolute coordinates. IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, IntPoint(m_x, selectionTop()), selHeight, sPos, ePos)); markerRect = renderer()->localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox(); renderer()->document()->markers()->setRenderedRectForMarker(renderer()->node(), marker, markerRect); // Optionally highlight the text if (renderer()->frame()->editor()->markedTextMatchesAreHighlighted()) { Color color = marker.activeMatch ? renderer()->theme()->platformActiveTextSearchHighlightColor() : renderer()->theme()->platformInactiveTextSearchHighlightColor(); pt->save(); updateGraphicsContext(pt, color, color, 0, style->colorSpace()); // Don't draw text at all! pt->clip(IntRect(boxOrigin.x(), boxOrigin.y() - deltaY, m_logicalWidth, selHeight)); pt->drawHighlightForText(font, run, IntPoint(boxOrigin.x(), boxOrigin.y() - deltaY), selHeight, color, style->colorSpace(), sPos, ePos); pt->restore(); } } void InlineTextBox::computeRectForReplacementMarker(const DocumentMarker& marker, RenderStyle* style, const Font& font) { // Replacement markers are not actually drawn, but their rects need to be computed for hit testing. 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(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()); IntPoint startPoint = IntPoint(m_x, y); // Compute and store the rect associated with this marker. IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, startPoint, h, sPos, ePos)); markerRect = renderer()->localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox(); renderer()->document()->markers()->setRenderedRectForMarker(renderer()->node(), marker, markerRect); } void InlineTextBox::paintDocumentMarkers(GraphicsContext* pt, const IntPoint& boxOrigin, RenderStyle* style, const Font& font, bool background) { if (!renderer()->node()) return; Vector markers = renderer()->document()->markers()->markersForNode(renderer()->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++) { const DocumentMarker& marker = *markerIt; // Paint either the background markers or the foreground markers, but not both switch (marker.type) { case DocumentMarker::Grammar: case DocumentMarker::Spelling: case DocumentMarker::Replacement: case DocumentMarker::CorrectionIndicator: case DocumentMarker::RejectedCorrection: 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, boxOrigin, marker, style, font, false); break; case DocumentMarker::Grammar: paintSpellingOrGrammarMarker(pt, boxOrigin, marker, style, font, true); break; case DocumentMarker::TextMatch: paintTextMatchMarker(pt, boxOrigin, marker, style, font); break; case DocumentMarker::CorrectionIndicator: computeRectForReplacementMarker(marker, style, font); paintSpellingOrGrammarMarker(pt, boxOrigin, marker, style, font, false); break; case DocumentMarker::Replacement: case DocumentMarker::RejectedCorrection: break; default: ASSERT_NOT_REACHED(); } } } void InlineTextBox::paintCompositionUnderline(GraphicsContext* ctx, const IntPoint& boxOrigin, const CompositionUnderline& underline) { if (m_truncation == cFullTruncation) return; int start = 0; // start of line to draw, relative to tx int width = m_logicalWidth; // 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 = toRenderText(renderer())->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 = toRenderText(renderer())->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; int baseline = renderer()->style(m_firstLine)->font().ascent(); if (underline.thick && logicalHeight() - baseline >= 2) lineThickness = 2; // We need to have some space between underlines of subsequent clauses, because some input methods do not use different underline styles for those. // We make each line shorter, which has a harmless side effect of shortening the first and last clauses, too. start += 1; width -= 2; ctx->setStrokeColor(underline.color, renderer()->style()->colorSpace()); ctx->setStrokeThickness(lineThickness); ctx->drawLineForText(IntPoint(boxOrigin.x() + start, boxOrigin.y() + logicalHeight() - lineThickness), width, textRenderer()->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 { // When computing the width of a text run, RenderBlock::computeInlineDirectionPositionsForLine() doesn't include the actual offset // from the containing block edge in its measurement. textPos() should be consistent so the text are rendered in the same width. if (logicalLeft() == 0) return 0; return logicalLeft() - root()->logicalLeft(); } int InlineTextBox::offsetForPosition(int lineOffset, bool includePartialGlyphs) const { if (isLineBreak()) return 0; RenderText* text = toRenderText(renderer()); RenderStyle* style = text->style(m_firstLine); const Font* f = &style->font(); return f->offsetForPosition(TextRun(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()), lineOffset - logicalLeft(), includePartialGlyphs); } int InlineTextBox::positionForOffset(int offset) const { ASSERT(offset >= m_start); ASSERT(offset <= m_start + m_len); if (isLineBreak()) return logicalLeft(); RenderText* text = toRenderText(renderer()); const Font& f = text->style(m_firstLine)->font(); int from = !isLeftToRightDirection() ? offset - m_start : 0; int to = !isLeftToRightDirection() ? 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, textRenderer()->allowTabs(), textPos(), m_toAdd, !isLeftToRightDirection(), m_dirOverride), IntPoint(logicalLeft(), 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