--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/rendering/InlineTextBox.cpp Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,859 @@
+/*
+ * (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 "Text.h"
+#include "TextStyle.h"
+#include "break_lines.h"
+#include <wtf/AlwaysInline.h>
+
+#if PLATFORM(SYMBIAN)
+#include "WebCoreGraphicsContext.h"
+#include "ZoomFactor.h"
+#endif
+
+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),
+ TextStyle(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<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 (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<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;
+}
+
+static 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();
+}
+
+static 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();
+
+ TextStyle textStyle(textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || styleToUse->visuallyOrdered());
+
+ 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), IntPoint(m_x + tx, m_y + ty + m_baseline), textStyle);
+ } 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), IntPoint(m_x + tx, m_y + ty + m_baseline), textStyle);
+ else {
+ if (sPos - 1 >= 0)
+ paintInfo.context->drawText(TextRun(textStr->characters() + m_start, m_len), IntPoint(m_x + tx, m_y + ty + m_baseline), textStyle, 0, sPos);
+ if (ePos < m_start + m_len)
+ paintInfo.context->drawText(TextRun(textStr->characters() + m_start, m_len), IntPoint(m_x + tx, m_y + ty + m_baseline), textStyle, 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), IntPoint(m_x + tx, m_y + ty + m_baseline), textStyle, 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<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(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();
+#if PLATFORM(SYMBIAN)
+ IntRect r(m_x + tx, y + ty, m_width, h);
+ IntRect clipRect = xForm(p->platformContext()->clippingRect());
+ clipRect.intersect(r);
+ //p->clip(clipRect);
+#else
+ p->clip(IntRect(m_x + tx, y + ty, m_width, h));
+#endif
+ p->drawHighlightForText(TextRun(textObject()->text()->characters() + m_start, m_len), IntPoint(m_x + tx, y + ty), h,
+ TextStyle(textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered()), 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),
+ IntPoint(m_x + tx, y + ty), h,
+ TextStyle(textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered()), 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<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.
+ 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<RenderText*>(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<RenderText*>(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);
+ TextStyle textStyle = TextStyle(textObject()->allowTabs(), textPos(), m_toAdd, m_reversed, m_dirOverride || style->visuallyOrdered());
+ int startPosition = max(marker.startOffset - m_start, (unsigned)0);
+ int endPosition = min(marker.endOffset - m_start, (unsigned)m_len);
+ TextRun run = TextRun(textObject()->text()->characters() + m_start, m_len);
+ IntRect markerRect = enclosingIntRect(f->selectionRectForText(run, textStyle, 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 = TextRun(textObject()->text()->characters() + m_start, m_len);
+ TextStyle renderStyle = TextStyle(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, renderStyle, startPoint, h, sPos, ePos));
+ object()->document()->setRenderedRectForMarker(object()->node(), marker, markerRect);
+
+ // Optionally highlight the text
+ if (object()->document()->frame()->markedTextMatchesAreHighlighted()) {
+ Color yellow = Color(255, 255, 0);
+ pt->save();
+ updateGraphicsContext(pt, yellow, yellow, 0); // Don't draw text at all!
+ pt->clip(IntRect(tx + m_x, ty + y, m_width, h));
+ pt->drawHighlightForText(run, startPoint, h, renderStyle, yellow, 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();
+ }
+
+ 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<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;
+
+ 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<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),
+ TextStyle(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<RenderText*>(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),
+ TextStyle(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