Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 197 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/RenderFieldset.cpp b/Source/WebCore/rendering/RenderFieldset.cpp
new file mode 100644
index 000000000..3a70866e2
--- /dev/null
+++ b/Source/WebCore/rendering/RenderFieldset.cpp
@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
+ *
+ * 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 "RenderFieldset.h"
+
+#include "CSSPropertyNames.h"
+#include "GraphicsContext.h"
+#include "HTMLNames.h"
+#include "PaintInfo.h"
+
+using std::min;
+using std::max;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+RenderFieldset::RenderFieldset(Node* element)
+    : RenderBlock(element)
+{
+}
+
+void RenderFieldset::computePreferredLogicalWidths()
+{
+    RenderBlock::computePreferredLogicalWidths();
+    if (RenderBox* legend = findLegend()) {
+        int legendMinWidth = legend->minPreferredLogicalWidth();
+
+        Length legendMarginLeft = legend->style()->marginLeft();
+        Length legendMarginRight = legend->style()->marginLeft();
+
+        if (legendMarginLeft.isFixed())
+            legendMinWidth += legendMarginLeft.value();
+
+        if (legendMarginRight.isFixed())
+            legendMinWidth += legendMarginRight.value();
+
+        m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, legendMinWidth + borderAndPaddingWidth());
+    }
+}
+
+RenderObject* RenderFieldset::layoutSpecialExcludedChild(bool relayoutChildren)
+{
+    RenderBox* legend = findLegend();
+    if (legend) {
+        if (relayoutChildren)
+            legend->setNeedsLayout(true);
+        legend->layoutIfNeeded();
+
+        LayoutUnit logicalLeft;
+        if (style()->isLeftToRightDirection()) {
+            switch (legend->style()->textAlign()) {
+            case CENTER:
+                logicalLeft = (logicalWidth() - logicalWidthForChild(legend)) / 2;
+                break;
+            case RIGHT:
+                logicalLeft = logicalWidth() - borderEnd() - paddingEnd() - logicalWidthForChild(legend);
+                break;
+            default:
+                logicalLeft = borderStart() + paddingStart() + marginStartForChild(legend);
+                break;
+            }
+        } else {
+            switch (legend->style()->textAlign()) {
+            case LEFT:
+                logicalLeft = borderStart() + paddingStart();
+                break;
+            case CENTER: {
+                // Make sure that the extra pixel goes to the end side in RTL (since it went to the end side
+                // in LTR).
+                LayoutUnit centeredWidth = logicalWidth() - logicalWidthForChild(legend);
+                logicalLeft = centeredWidth - centeredWidth / 2;
+                break;
+            }
+            default:
+                logicalLeft = logicalWidth() - borderStart() - paddingStart() - marginStartForChild(legend) - logicalWidthForChild(legend);
+                break;
+            }
+        }
+
+        setLogicalLeftForChild(legend, logicalLeft);
+
+        LayoutUnit b = borderBefore();
+        LayoutUnit h = logicalHeightForChild(legend);
+        setLogicalTopForChild(legend, max<LayoutUnit>((b - h) / 2, 0));
+        setLogicalHeight(max(b, h) + paddingBefore());
+    }
+    return legend;
+}
+
+RenderBox* RenderFieldset::findLegend() const
+{
+    for (RenderObject* legend = firstChild(); legend; legend = legend->nextSibling()) {
+        if (!legend->isFloatingOrPositioned() && legend->node() && (legend->node()->hasTagName(legendTag)))
+            return toRenderBox(legend);
+    }
+    return 0;
+}
+
+void RenderFieldset::paintBoxDecorations(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    if (!paintInfo.shouldPaintWithinRoot(this))
+        return;
+
+    LayoutRect paintRect(paintOffset, size());
+    RenderBox* legend = findLegend();
+    if (!legend)
+        return RenderBlock::paintBoxDecorations(paintInfo, paintOffset);
+
+    // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
+    // cases the legend is embedded in the right and bottom borders respectively.
+    // https://bugs.webkit.org/show_bug.cgi?id=47236
+    if (style()->isHorizontalWritingMode()) {
+        LayoutUnit yOff = (legend->y() > 0) ? 0 : (legend->height() - borderTop()) / 2;
+        paintRect.setHeight(paintRect.height() - yOff);
+        paintRect.setY(paintRect.y() + yOff);
+    } else {
+        LayoutUnit xOff = (legend->x() > 0) ? 0 : (legend->width() - borderLeft()) / 2;
+        paintRect.setWidth(paintRect.width() - xOff);
+        paintRect.setX(paintRect.x() + xOff);
+    }
+    
+    paintBoxShadow(paintInfo, paintRect, style(), Normal);
+    paintFillLayers(paintInfo, style()->visitedDependentColor(CSSPropertyBackgroundColor), style()->backgroundLayers(), paintRect);
+    paintBoxShadow(paintInfo, paintRect, style(), Inset);
+
+    if (!style()->hasBorder())
+        return;
+    
+    // Create a clipping region around the legend and paint the border as normal
+    GraphicsContext* graphicsContext = paintInfo.context;
+    GraphicsContextStateSaver stateSaver(*graphicsContext);
+
+    // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
+    // cases the legend is embedded in the right and bottom borders respectively.
+    // https://bugs.webkit.org/show_bug.cgi?id=47236
+    if (style()->isHorizontalWritingMode()) {
+        LayoutUnit clipTop = paintRect.y();
+        LayoutUnit clipHeight = max(static_cast<LayoutUnit>(style()->borderTopWidth()), legend->height());
+        graphicsContext->clipOut(LayoutRect(paintRect.x() + legend->x(), clipTop, legend->width(), clipHeight));
+    } else {
+        LayoutUnit clipLeft = paintRect.x();
+        LayoutUnit clipWidth = max(static_cast<LayoutUnit>(style()->borderLeftWidth()), legend->width());
+        graphicsContext->clipOut(LayoutRect(clipLeft, paintRect.y() + legend->y(), clipWidth, legend->height()));
+    }
+
+    paintBorder(paintInfo, paintRect, style());
+}
+
+void RenderFieldset::paintMask(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    if (style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
+        return;
+
+    LayoutRect paintRect = LayoutRect(paintOffset, size());
+    RenderBox* legend = findLegend();
+    if (!legend)
+        return RenderBlock::paintMask(paintInfo, paintOffset);
+
+    // FIXME: We need to work with "rl" and "bt" block flow directions.  In those
+    // cases the legend is embedded in the right and bottom borders respectively.
+    // https://bugs.webkit.org/show_bug.cgi?id=47236
+    if (style()->isHorizontalWritingMode()) {
+        LayoutUnit yOff = (legend->y() > 0) ? 0 : (legend->height() - borderTop()) / 2;
+        paintRect.expand(0, -yOff);
+        paintRect.move(0, yOff);
+    } else {
+        LayoutUnit xOff = (legend->x() > 0) ? 0 : (legend->width() - borderLeft()) / 2;
+        paintRect.expand(-xOff, 0);
+        paintRect.move(xOff, 0);
+    }
+
+    paintMaskImages(paintInfo, paintRect);
+}
+
+} // namespace WebCore