| /* |
| * (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> |
| |
| 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(); |
| p->clip(IntRect(m_x + tx, y + ty, m_width, h)); |
| 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 |
