--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderScrollbar.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,336 @@
+/*
+ * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "RenderScrollbar.h"
+
+#include "RenderScrollbarPart.h"
+#include "RenderScrollbarTheme.h"
+
+namespace WebCore {
+
+PassRefPtr<Scrollbar> RenderScrollbar::createCustomScrollbar(ScrollbarClient* client, ScrollbarOrientation orientation, RenderBox* renderer)
+{
+ return adoptRef(new RenderScrollbar(client, orientation, renderer));
+}
+
+RenderScrollbar::RenderScrollbar(ScrollbarClient* client, ScrollbarOrientation orientation, RenderBox* renderer)
+ : Scrollbar(client, orientation, RegularScrollbar, RenderScrollbarTheme::renderScrollbarTheme())
+ , m_owner(renderer)
+{
+ // FIXME: We need to do this because RenderScrollbar::styleChanged is called as soon as the scrollbar is created.
+
+ // Update the scrollbar size.
+ updateScrollbarPart(ScrollbarBGPart);
+ RenderScrollbarPart* part = m_parts.get(ScrollbarBGPart);
+ if (!part)
+ return;
+
+ part->layout();
+ setFrameRect(IntRect(0, 0, part->width(), part->height()));
+}
+
+RenderScrollbar::~RenderScrollbar()
+{
+ ASSERT(m_parts.isEmpty());
+}
+
+void RenderScrollbar::setParent(ScrollView* parent)
+{
+ Scrollbar::setParent(parent);
+ if (!parent) {
+ // Destroy all of the scrollbar's RenderBoxes.
+ updateScrollbarParts(true);
+ }
+}
+
+void RenderScrollbar::setEnabled(bool e)
+{
+ bool wasEnabled = enabled();
+ Scrollbar::setEnabled(e);
+ if (wasEnabled != e)
+ updateScrollbarParts();
+}
+
+void RenderScrollbar::styleChanged()
+{
+ updateScrollbarParts();
+}
+
+void RenderScrollbar::paint(GraphicsContext* context, const IntRect& damageRect)
+{
+ if (context->updatingControlTints()) {
+ updateScrollbarParts();
+ return;
+ }
+ Scrollbar::paint(context, damageRect);
+}
+
+void RenderScrollbar::setHoveredPart(ScrollbarPart part)
+{
+ if (part == m_hoveredPart)
+ return;
+
+ ScrollbarPart oldPart = m_hoveredPart;
+ m_hoveredPart = part;
+
+ updateScrollbarPart(oldPart);
+ updateScrollbarPart(m_hoveredPart);
+
+ updateScrollbarPart(ScrollbarBGPart);
+ updateScrollbarPart(TrackBGPart);
+}
+
+void RenderScrollbar::setPressedPart(ScrollbarPart part)
+{
+ ScrollbarPart oldPart = m_pressedPart;
+ Scrollbar::setPressedPart(part);
+
+ updateScrollbarPart(oldPart);
+ updateScrollbarPart(part);
+
+ updateScrollbarPart(ScrollbarBGPart);
+ updateScrollbarPart(TrackBGPart);
+}
+
+static ScrollbarPart s_styleResolvePart;
+static RenderScrollbar* s_styleResolveScrollbar;
+
+RenderScrollbar* RenderScrollbar::scrollbarForStyleResolve()
+{
+ return s_styleResolveScrollbar;
+}
+
+ScrollbarPart RenderScrollbar::partForStyleResolve()
+{
+ return s_styleResolvePart;
+}
+
+PassRefPtr<RenderStyle> RenderScrollbar::getScrollbarPseudoStyle(ScrollbarPart partType, PseudoId pseudoId)
+{
+ s_styleResolvePart = partType;
+ s_styleResolveScrollbar = this;
+ RefPtr<RenderStyle> result = m_owner->getUncachedPseudoStyle(pseudoId, m_owner->style());
+ s_styleResolvePart = NoPart;
+ s_styleResolveScrollbar = 0;
+ return result;
+}
+
+void RenderScrollbar::updateScrollbarParts(bool destroy)
+{
+ updateScrollbarPart(ScrollbarBGPart, destroy);
+ updateScrollbarPart(BackButtonStartPart, destroy);
+ updateScrollbarPart(ForwardButtonStartPart, destroy);
+ updateScrollbarPart(BackTrackPart, destroy);
+ updateScrollbarPart(ThumbPart, destroy);
+ updateScrollbarPart(ForwardTrackPart, destroy);
+ updateScrollbarPart(BackButtonEndPart, destroy);
+ updateScrollbarPart(ForwardButtonEndPart, destroy);
+ updateScrollbarPart(TrackBGPart, destroy);
+
+ if (destroy)
+ return;
+
+ // See if the scrollbar's thickness changed. If so, we need to mark our owning object as needing a layout.
+ bool isHorizontal = orientation() == HorizontalScrollbar;
+ int oldThickness = isHorizontal ? height() : width();
+ int newThickness = 0;
+ RenderScrollbarPart* part = m_parts.get(ScrollbarBGPart);
+ if (part) {
+ part->layout();
+ newThickness = isHorizontal ? part->height() : part->width();
+ }
+
+ if (newThickness != oldThickness) {
+ setFrameRect(IntRect(x(), y(), isHorizontal ? width() : newThickness, isHorizontal ? newThickness : height()));
+ m_owner->setChildNeedsLayout(true);
+ }
+}
+
+static PseudoId pseudoForScrollbarPart(ScrollbarPart part)
+{
+ switch (part) {
+ case BackButtonStartPart:
+ case ForwardButtonStartPart:
+ case BackButtonEndPart:
+ case ForwardButtonEndPart:
+ return SCROLLBAR_BUTTON;
+ case BackTrackPart:
+ case ForwardTrackPart:
+ return SCROLLBAR_TRACK_PIECE;
+ case ThumbPart:
+ return SCROLLBAR_THUMB;
+ case TrackBGPart:
+ return SCROLLBAR_TRACK;
+ case ScrollbarBGPart:
+ return SCROLLBAR;
+ case NoPart:
+ case AllParts:
+ break;
+ }
+ ASSERT_NOT_REACHED();
+ return SCROLLBAR;
+}
+
+void RenderScrollbar::updateScrollbarPart(ScrollbarPart partType, bool destroy)
+{
+ if (partType == NoPart)
+ return;
+
+ RefPtr<RenderStyle> partStyle = !destroy ? getScrollbarPseudoStyle(partType, pseudoForScrollbarPart(partType)) : 0;
+
+ bool needRenderer = !destroy && partStyle && partStyle->display() != NONE && partStyle->visibility() == VISIBLE;
+
+ if (needRenderer && partStyle->display() != BLOCK) {
+ // See if we are a button that should not be visible according to OS settings.
+ ScrollbarButtonsPlacement buttonsPlacement = theme()->buttonsPlacement();
+ switch (partType) {
+ case BackButtonStartPart:
+ needRenderer = (buttonsPlacement == ScrollbarButtonsSingle || buttonsPlacement == ScrollbarButtonsDoubleStart ||
+ buttonsPlacement == ScrollbarButtonsDoubleBoth);
+ break;
+ case ForwardButtonStartPart:
+ needRenderer = (buttonsPlacement == ScrollbarButtonsDoubleStart || buttonsPlacement == ScrollbarButtonsDoubleBoth);
+ break;
+ case BackButtonEndPart:
+ needRenderer = (buttonsPlacement == ScrollbarButtonsDoubleEnd || buttonsPlacement == ScrollbarButtonsDoubleBoth);
+ break;
+ case ForwardButtonEndPart:
+ needRenderer = (buttonsPlacement == ScrollbarButtonsSingle || buttonsPlacement == ScrollbarButtonsDoubleEnd ||
+ buttonsPlacement == ScrollbarButtonsDoubleBoth);
+ break;
+ default:
+ break;
+ }
+ }
+
+ RenderScrollbarPart* partRenderer = m_parts.get(partType);
+ if (!partRenderer && needRenderer) {
+ partRenderer = new (m_owner->renderArena()) RenderScrollbarPart(m_owner->document(), this, partType);
+ m_parts.set(partType, partRenderer);
+ } else if (partRenderer && !needRenderer) {
+ m_parts.remove(partType);
+ partRenderer->destroy();
+ partRenderer = 0;
+ }
+
+ if (partRenderer)
+ partRenderer->setStyle(partStyle.release());
+}
+
+void RenderScrollbar::paintPart(GraphicsContext* graphicsContext, ScrollbarPart partType, const IntRect& rect)
+{
+ RenderScrollbarPart* partRenderer = m_parts.get(partType);
+ if (!partRenderer)
+ return;
+ partRenderer->paintIntoRect(graphicsContext, x(), y(), rect);
+}
+
+IntRect RenderScrollbar::buttonRect(ScrollbarPart partType)
+{
+ RenderScrollbarPart* partRenderer = m_parts.get(partType);
+ if (!partRenderer)
+ return IntRect();
+
+ partRenderer->layout();
+
+ bool isHorizontal = orientation() == HorizontalScrollbar;
+ if (partType == BackButtonStartPart)
+ return IntRect(x(), y(), isHorizontal ? partRenderer->width() : width(), isHorizontal ? height() : partRenderer->height());
+ if (partType == ForwardButtonEndPart)
+ return IntRect(isHorizontal ? x() + width() - partRenderer->width() : x(),
+
+ isHorizontal ? y() : y() + height() - partRenderer->height(),
+ isHorizontal ? partRenderer->width() : width(),
+ isHorizontal ? height() : partRenderer->height());
+
+ if (partType == ForwardButtonStartPart) {
+ IntRect previousButton = buttonRect(BackButtonStartPart);
+ return IntRect(isHorizontal ? x() + previousButton.width() : x(),
+ isHorizontal ? y() : y() + previousButton.height(),
+ isHorizontal ? partRenderer->width() : width(),
+ isHorizontal ? height() : partRenderer->height());
+ }
+
+ IntRect followingButton = buttonRect(ForwardButtonEndPart);
+ return IntRect(isHorizontal ? x() + width() - followingButton.width() - partRenderer->width() : x(),
+ isHorizontal ? y() : y() + height() - followingButton.height() - partRenderer->height(),
+ isHorizontal ? partRenderer->width() : width(),
+ isHorizontal ? height() : partRenderer->height());
+}
+
+IntRect RenderScrollbar::trackRect(int startLength, int endLength)
+{
+ RenderScrollbarPart* part = m_parts.get(TrackBGPart);
+ if (part)
+ part->layout();
+
+ if (orientation() == HorizontalScrollbar) {
+ int marginLeft = part ? part->marginLeft() : 0;
+ int marginRight = part ? part->marginRight() : 0;
+ startLength += marginLeft;
+ endLength += marginRight;
+ int totalLength = startLength + endLength;
+ return IntRect(x() + startLength, y(), width() - totalLength, height());
+ }
+
+ int marginTop = part ? part->marginTop() : 0;
+ int marginBottom = part ? part->marginBottom() : 0;
+ startLength += marginTop;
+ endLength += marginBottom;
+ int totalLength = startLength + endLength;
+
+ return IntRect(x(), y() + startLength, width(), height() - totalLength);
+}
+
+IntRect RenderScrollbar::trackPieceRectWithMargins(ScrollbarPart partType, const IntRect& oldRect)
+{
+ RenderScrollbarPart* partRenderer = m_parts.get(partType);
+ if (!partRenderer)
+ return oldRect;
+
+ partRenderer->layout();
+
+ IntRect rect = oldRect;
+ if (orientation() == HorizontalScrollbar) {
+ rect.setX(rect.x() + partRenderer->marginLeft());
+ rect.setWidth(rect.width() - (partRenderer->marginLeft() + partRenderer->marginRight()));
+ } else {
+ rect.setY(rect.y() + partRenderer->marginTop());
+ rect.setHeight(rect.height() - (partRenderer->marginTop() + partRenderer->marginBottom()));
+ }
+ return rect;
+}
+
+int RenderScrollbar::minimumThumbLength()
+{
+ RenderScrollbarPart* partRenderer = m_parts.get(ThumbPart);
+ if (!partRenderer)
+ return 0;
+ partRenderer->layout();
+ return orientation() == HorizontalScrollbar ? partRenderer->width() : partRenderer->height();
+}
+
+}