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Diffstat (limited to 'src/3rdparty/webkit/WebCore/rendering/InlineTextBox.cpp')
| -rw-r--r-- | src/3rdparty/webkit/WebCore/rendering/InlineTextBox.cpp | 909 |
1 files changed, 909 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/rendering/InlineTextBox.cpp b/src/3rdparty/webkit/WebCore/rendering/InlineTextBox.cpp new file mode 100644 index 0000000..a5857e0 --- /dev/null +++ b/src/3rdparty/webkit/WebCore/rendering/InlineTextBox.cpp @@ -0,0 +1,909 @@ +/* + * (C) 1999 Lars Knoll (knoll@kde.org) + * (C) 2000 Dirk Mueller (mueller@kde.org) + * Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "ChromeClient.h" +#include "Document.h" +#include "Editor.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 <wtf/AlwaysInline.h> + +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, direction() == RTL, 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<RenderText*>(m_object)->removeTextBox(this); + destroy(arena); +} + +void InlineTextBox::extractLine() +{ + if (m_extracted) + return; + + static_cast<RenderText*>(m_object)->extractTextBox(this); +} + +void InlineTextBox::attachLine() +{ + if (!m_extracted) + return; + + static_cast<RenderText*>(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 (direction() == RTL) + 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<RenderText*>(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&, 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 && visibleToHitTesting() && rect.contains(x, y)) { + object()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); + return true; + } + return false; +} + +static void paintTextWithShadows(GraphicsContext* context, const TextRun& textRun, int startOffset, int endOffset, const IntPoint& textOrigin, int x, int y, int w, int h, ShadowData* shadow, bool stroked) +{ + do { + IntSize extraOffset; + + if (shadow) { + IntSize shadowOffset(shadow->x, shadow->y); + int shadowBlur = shadow->blur; + const Color& shadowColor = shadow->color; + + if (shadow->next || stroked) { + IntRect shadowRect(x, y, w, h); + shadowRect.inflate(shadowBlur); + shadowRect.move(shadowOffset); + context->save(); + context->clip(shadowRect); + + extraOffset = IntSize(0, 2 * h + max(0, shadowOffset.height()) + shadowBlur); + shadowOffset -= extraOffset; + } + context->setShadow(shadowOffset, shadowBlur, shadowColor); + } + + if (startOffset <= endOffset) + context->drawText(textRun, textOrigin + extraOffset, startOffset, endOffset); + else { + if (endOffset > 0) + context->drawText(textRun, textOrigin + extraOffset, 0, endOffset); + if (startOffset < textRun.length()) + context->drawText(textRun, textOrigin + extraOffset, startOffset); + } + + if (!shadow) + break; + + if (shadow->next || stroked) + context->restore(); + else + context->clearShadow(); + + shadow = shadow->next; + } while (shadow || stroked); +} + +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 && 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; + + GraphicsContext* context = paintInfo.context; + + // 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 != context->font()) + context->setFont(*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, tx, ty, styleToUse, font, + object()->document()->frame()->editor()->compositionStart(), + object()->document()->frame()->editor()->compositionEnd()); + + paintDocumentMarkers(context, tx, ty, styleToUse, font, true); + + if (haveSelection && !useCustomUnderlines) + paintSelection(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(); + ShadowData* textShadow = paintInfo.forceBlackText ? 0 : styleToUse->textShadow(); + + 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); + } + + bool paintSelectedTextOnly = (paintInfo.phase == PaintPhaseSelection); + bool paintSelectedTextSeparately = false; + + Color selectionFillColor = textFillColor; + Color selectionStrokeColor = textStrokeColor; + float selectionStrokeWidth = textStrokeWidth; + ShadowData* selectionShadow = textShadow; + if (haveSelection) { + // Check foreground color first. + Color foreground = paintInfo.forceBlackText ? Color::black : object()->selectionForegroundColor(); + if (foreground.isValid() && foreground != selectionFillColor) { + if (!paintSelectedTextOnly) + paintSelectedTextSeparately = true; + selectionFillColor = foreground; + } + + if (RenderStyle* pseudoStyle = object()->getCachedPseudoStyle(RenderStyle::SELECTION)) { + 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->textStrokeColor(); + if (!stroke.isValid()) + stroke = pseudoStyle->color(); + if (stroke != selectionStrokeColor) { + if (!paintSelectedTextOnly) + paintSelectedTextSeparately = true; + selectionStrokeColor = stroke; + } + } + } + + IntPoint textOrigin(m_x + tx, m_y + ty + m_baseline); + TextRun textRun(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, direction() == RTL, m_dirOverride || styleToUse->visuallyOrdered()); + + int sPos = 0; + int ePos = 0; + if (paintSelectedTextOnly || paintSelectedTextSeparately) + selectionStartEnd(sPos, ePos); + + 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); + if (!paintSelectedTextSeparately || ePos <= sPos) { + // FIXME: Truncate right-to-left text correctly. + paintTextWithShadows(context, textRun, 0, m_truncation == cNoTruncation ? m_len : m_truncation, textOrigin, m_x + tx, m_y + ty, width(), height(), textShadow, textStrokeWidth > 0); + } else + paintTextWithShadows(context, textRun, ePos, sPos, textOrigin, m_x + tx, m_y + ty, width(), height(), textShadow, textStrokeWidth > 0); + + 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); + paintTextWithShadows(context, textRun, sPos, ePos, textOrigin, m_x + tx, m_y + ty, width(), height(), selectionShadow, selectionStrokeWidth > 0); + + if (selectionStrokeWidth > 0) + context->restore(); + } + + // Paint decorations + if (d != TDNONE && paintInfo.phase != PaintPhaseSelection && styleToUse->htmlHacks()) { + context->setStrokeColor(styleToUse->color()); + paintDecoration(context, tx, ty, d, textShadow); + } + + if (paintInfo.phase == PaintPhaseForeground) { + paintDocumentMarkers(context, tx, ty, styleToUse, font, false); + + if (useCustomUnderlines) { + const Vector<CompositionUnderline>& 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(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; + } + } + } +} + +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* context, int tx, int ty, RenderStyle* style, const Font*) +{ + // 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()); + + context->save(); + updateGraphicsContext(context, c, c, 0); // Don't draw text at all! + int y = selectionTop(); + int h = selectionHeight(); + context->clip(IntRect(m_x + tx, y + ty, m_width, h)); + context->drawHighlightForText(TextRun(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, direction() == RTL, m_dirOverride || style->visuallyOrdered()), + IntPoint(m_x + tx, y + ty), h, c, sPos, ePos); + context->restore(); +} + +void InlineTextBox::paintCompositionBackground(GraphicsContext* context, int tx, int ty, RenderStyle* style, const 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); // Don't draw text at all! + + int y = selectionTop(); + int h = selectionHeight(); + context->drawHighlightForText(TextRun(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, direction() == RTL, m_dirOverride || style->visuallyOrdered()), + IntPoint(m_x + tx, y + ty), h, c, sPos, ePos); + context->restore(); +} + +#if PLATFORM(MAC) + +void InlineTextBox::paintCustomHighlight(int tx, int ty, const AtomicString& type) +{ + Frame* frame = object()->document()->frame(); + if (!frame) + return; + Page* page = frame->page(); + if (!page) + return; + + RootInlineBox* r = root(); + FloatRect rootRect(tx + r->xPos(), ty + selectionTop(), r->width(), selectionHeight()); + FloatRect textRect(tx + xPos(), rootRect.y(), width(), rootRect.height()); + + page->chrome()->client()->paintCustomHighlight(object()->node(), type, textRect, rootRect, true, false); +} + +#endif + +void InlineTextBox::paintDecoration(GraphicsContext* context, int tx, int ty, int deco, ShadowData* shadow) +{ + tx += m_x; + ty += m_y; + + if (m_truncation == cFullTruncation) + return; + + int width = (m_truncation == cNoTruncation) ? m_width + : static_cast<RenderText*>(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. + + bool linesAreOpaque = !isPrinting && (!(deco & UNDERLINE) || underline.alpha() == 255) && (!(deco & OVERLINE) || overline.alpha() == 255) && (!(deco & LINE_THROUGH) || linethrough.alpha() == 255); + + bool setClip = false; + int extraOffset = 0; + if (!linesAreOpaque && shadow && shadow->next) { + context->save(); + IntRect clipRect(tx, ty, width, m_baseline + 2); + for (ShadowData* s = shadow; s; s = s->next) { + IntRect shadowRect(tx, ty, width, m_baseline + 2); + shadowRect.inflate(s->blur); + shadowRect.move(s->x, s->y); + clipRect.unite(shadowRect); + extraOffset = max(extraOffset, max(0, s->y) + s->blur); + } + context->save(); + context->clip(clipRect); + extraOffset += m_baseline + 2; + ty += extraOffset; + setClip = true; + } + + bool setShadow = false; + do { + if (shadow) { + if (!shadow->next) { + // The last set of lines paints normally inside the clip. + ty -= extraOffset; + extraOffset = 0; + } + context->setShadow(IntSize(shadow->x, shadow->y - extraOffset), shadow->blur, shadow->color); + setShadow = true; + shadow = shadow->next; + } + + 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); + } + } while (shadow); + + if (setClip) + context->restore(); + else if (setShadow) + context->clearShadow(); +} + +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; + + int start = 0; // start of line to draw, relative to tx + int width = m_width; // 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<int>(marker.startOffset - m_start, 0); + int endPosition = min<int>(marker.endOffset - m_start, m_len); + + if (m_truncation != cNoTruncation) + endPosition = min<int>(endPosition, m_truncation); + + // Calculate start & width + IntPoint startPoint(tx + m_x, ty + selectionTop()); + TextRun run(textObject()->text()->characters() + m_start, m_len, textObject()->allowTabs(), textPos(), m_toAdd, direction() == RTL, m_dirOverride || style->visuallyOrdered()); + int h = selectionHeight(); + + IntRect markerRect = enclosingIntRect(f->selectionRectForText(run, startPoint, h, 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) + 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 + m_x + start, ty + m_y + 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, direction() == RTL, 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<DocumentMarker> markers = object()->document()->markersForNode(object()->node()); + Vector<DocumentMarker>::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(); + } + + } +} + + +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<RenderText*>(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<RenderText*>(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; + + // 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); + 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 direction() == RTL ? 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<RenderText*>(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, direction() == RTL, m_dirOverride || style->visuallyOrdered()), + _x - m_x, includePartialGlyphs); +} + +int InlineTextBox::positionForOffset(int offset) const +{ + ASSERT(offset >= m_start); + ASSERT(offset <= m_start + m_len); + + if (isLineBreak()) + return m_x; + + RenderText* text = static_cast<RenderText*>(m_object); + const Font& f = text->style(m_firstLine)->font(); + int from = direction() == RTL ? offset - m_start : 0; + int to = direction() == RTL ? 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, direction() == RTL, 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 |