| /* |
| * Copyright (C) 2008, 2011 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 "platform/scroll/ScrollbarThemeMacCommon.h" |
| |
| #include <Carbon/Carbon.h> |
| #include "platform/PlatformMouseEvent.h" |
| #include "platform/graphics/Gradient.h" |
| #include "platform/graphics/GraphicsContext.h" |
| #include "platform/graphics/GraphicsContextStateSaver.h" |
| #include "platform/graphics/GraphicsLayer.h" |
| #include "platform/graphics/ImageBuffer.h" |
| #include "platform/mac/ColorMac.h" |
| #include "platform/mac/LocalCurrentGraphicsContext.h" |
| #include "platform/mac/NSScrollerImpDetails.h" |
| #include "platform/mac/ScrollAnimatorMac.h" |
| #include "platform/scroll/ScrollbarThemeClient.h" |
| #include "platform/scroll/ScrollbarThemeMacNonOverlayAPI.h" |
| #include "platform/scroll/ScrollbarThemeMacOverlayAPI.h" |
| #include "public/platform/mac/WebThemeEngine.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebRect.h" |
| #include "skia/ext/skia_utils_mac.h" |
| #include "wtf/HashSet.h" |
| #include "wtf/StdLibExtras.h" |
| #include "wtf/TemporaryChange.h" |
| |
| // FIXME: There are repainting problems due to Aqua scroll bar buttons' visual overflow. |
| |
| using namespace std; |
| using namespace WebCore; |
| |
| @interface NSColor (WebNSColorDetails) |
| + (NSImage *)_linenPatternImage; |
| @end |
| |
| namespace WebCore { |
| |
| typedef HashSet<ScrollbarThemeClient*> ScrollbarSet; |
| |
| static ScrollbarSet& scrollbarSet() |
| { |
| DEFINE_STATIC_LOCAL(ScrollbarSet, set, ()); |
| return set; |
| } |
| |
| } |
| |
| namespace WebCore { |
| |
| static float gInitialButtonDelay = 0.5f; |
| static float gAutoscrollButtonDelay = 0.05f; |
| static bool gJumpOnTrackClick = false; |
| |
| ScrollbarTheme* ScrollbarTheme::nativeTheme() |
| { |
| static ScrollbarThemeMacCommon* theme = NULL; |
| if (theme) |
| return theme; |
| if (isScrollbarOverlayAPIAvailable()) { |
| DEFINE_STATIC_LOCAL(ScrollbarThemeMacOverlayAPI, overlayTheme, ()); |
| theme = &overlayTheme; |
| } else { |
| DEFINE_STATIC_LOCAL(ScrollbarThemeMacNonOverlayAPI, nonOverlayTheme, ()); |
| theme = &nonOverlayTheme; |
| } |
| return theme; |
| } |
| |
| void ScrollbarThemeMacCommon::registerScrollbar(ScrollbarThemeClient* scrollbar) |
| { |
| scrollbarSet().add(scrollbar); |
| } |
| |
| void ScrollbarThemeMacCommon::unregisterScrollbar(ScrollbarThemeClient* scrollbar) |
| { |
| scrollbarSet().remove(scrollbar); |
| } |
| |
| void ScrollbarThemeMacCommon::paintGivenTickmarks(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect, const Vector<IntRect>& tickmarks) |
| { |
| if (scrollbar->orientation() != VerticalScrollbar) |
| return; |
| |
| if (rect.height() <= 0 || rect.width() <= 0) |
| return; // nothing to draw on. |
| |
| if (!tickmarks.size()) |
| return; |
| |
| GraphicsContextStateSaver stateSaver(*context); |
| context->setShouldAntialias(false); |
| context->setStrokeColor(Color(0xCC, 0xAA, 0x00, 0xFF)); |
| context->setFillColor(Color(0xFF, 0xDD, 0x00, 0xFF)); |
| |
| for (Vector<IntRect>::const_iterator i = tickmarks.begin(); i != tickmarks.end(); ++i) { |
| // Calculate how far down (in %) the tick-mark should appear. |
| const float percent = static_cast<float>(i->y()) / scrollbar->totalSize(); |
| if (percent < 0.0 || percent > 1.0) |
| continue; |
| |
| // Calculate how far down (in pixels) the tick-mark should appear. |
| const int yPos = rect.y() + (rect.height() * percent); |
| |
| // Paint. |
| FloatRect tickRect(rect.x(), yPos, rect.width(), 2); |
| context->fillRect(tickRect); |
| context->strokeRect(tickRect, 1); |
| } |
| } |
| |
| void ScrollbarThemeMacCommon::paintOverhangBackground(GraphicsContext* context, const IntRect& horizontalOverhangRect, const IntRect& verticalOverhangRect, const IntRect& dirtyRect) |
| { |
| const bool hasHorizontalOverhang = !horizontalOverhangRect.isEmpty(); |
| const bool hasVerticalOverhang = !verticalOverhangRect.isEmpty(); |
| |
| GraphicsContextStateSaver stateSaver(*context); |
| |
| if (!m_overhangPattern) { |
| // Lazily load the linen pattern image used for overhang drawing. |
| RefPtr<Image> patternImage = Image::loadPlatformResource("overhangPattern"); |
| m_overhangPattern = Pattern::create(patternImage, true, true); |
| } |
| context->setFillPattern(m_overhangPattern); |
| if (hasHorizontalOverhang) |
| context->fillRect(intersection(horizontalOverhangRect, dirtyRect)); |
| if (hasVerticalOverhang) |
| context->fillRect(intersection(verticalOverhangRect, dirtyRect)); |
| } |
| |
| void ScrollbarThemeMacCommon::paintOverhangShadows(GraphicsContext* context, const IntSize& scrollOffset, const IntRect& horizontalOverhangRect, const IntRect& verticalOverhangRect, const IntRect& dirtyRect) |
| { |
| // The extent of each shadow in pixels. |
| const int kShadowSize = 4; |
| // Offset of negative one pixel to make the gradient blend with the toolbar's bottom border. |
| const int kToolbarShadowOffset = -1; |
| const struct { |
| float stop; |
| Color color; |
| } kShadowColors[] = { |
| { 0.000, Color(0, 0, 0, 255) }, |
| { 0.125, Color(0, 0, 0, 57) }, |
| { 0.375, Color(0, 0, 0, 41) }, |
| { 0.625, Color(0, 0, 0, 18) }, |
| { 0.875, Color(0, 0, 0, 6) }, |
| { 1.000, Color(0, 0, 0, 0) } |
| }; |
| const unsigned kNumShadowColors = sizeof(kShadowColors)/sizeof(kShadowColors[0]); |
| |
| const bool hasHorizontalOverhang = !horizontalOverhangRect.isEmpty(); |
| const bool hasVerticalOverhang = !verticalOverhangRect.isEmpty(); |
| // Prefer non-additive shadows, but degrade to additive shadows if there is vertical overhang. |
| const bool useAdditiveShadows = hasVerticalOverhang; |
| |
| GraphicsContextStateSaver stateSaver(*context); |
| |
| FloatPoint shadowCornerOrigin; |
| FloatPoint shadowCornerOffset; |
| |
| // Draw the shadow for the horizontal overhang. |
| if (hasHorizontalOverhang) { |
| int toolbarShadowHeight = kShadowSize; |
| RefPtr<Gradient> gradient; |
| IntRect shadowRect = horizontalOverhangRect; |
| shadowRect.setHeight(kShadowSize); |
| if (scrollOffset.height() < 0) { |
| if (useAdditiveShadows) { |
| toolbarShadowHeight = std::min(horizontalOverhangRect.height(), kShadowSize); |
| } else if (horizontalOverhangRect.height() < 2 * kShadowSize + kToolbarShadowOffset) { |
| // Split the overhang area between the web content shadow and toolbar shadow if it's too small. |
| shadowRect.setHeight((horizontalOverhangRect.height() + 1) / 2); |
| toolbarShadowHeight = horizontalOverhangRect.height() - shadowRect.height() - kToolbarShadowOffset; |
| } |
| shadowRect.setY(horizontalOverhangRect.maxY() - shadowRect.height()); |
| gradient = Gradient::create(FloatPoint(0, shadowRect.maxY()), FloatPoint(0, shadowRect.maxY() - kShadowSize)); |
| shadowCornerOrigin.setY(shadowRect.maxY()); |
| shadowCornerOffset.setY(-kShadowSize); |
| } else { |
| gradient = Gradient::create(FloatPoint(0, shadowRect.y()), FloatPoint(0, shadowRect.maxY())); |
| shadowCornerOrigin.setY(shadowRect.y()); |
| } |
| if (hasVerticalOverhang) { |
| shadowRect.setWidth(shadowRect.width() - verticalOverhangRect.width()); |
| if (scrollOffset.width() < 0) { |
| shadowRect.setX(shadowRect.x() + verticalOverhangRect.width()); |
| shadowCornerOrigin.setX(shadowRect.x()); |
| shadowCornerOffset.setX(-kShadowSize); |
| } else { |
| shadowCornerOrigin.setX(shadowRect.maxX()); |
| } |
| } |
| for (unsigned i = 0; i < kNumShadowColors; i++) |
| gradient->addColorStop(kShadowColors[i].stop, kShadowColors[i].color); |
| context->setFillGradient(gradient); |
| context->fillRect(intersection(shadowRect, dirtyRect)); |
| |
| // Draw a drop-shadow from the toolbar. |
| if (scrollOffset.height() < 0) { |
| shadowRect.setY(kToolbarShadowOffset); |
| shadowRect.setHeight(toolbarShadowHeight); |
| gradient = Gradient::create(FloatPoint(0, shadowRect.y()), FloatPoint(0, shadowRect.y() + kShadowSize)); |
| for (unsigned i = 0; i < kNumShadowColors; i++) |
| gradient->addColorStop(kShadowColors[i].stop, kShadowColors[i].color); |
| context->setFillGradient(gradient); |
| context->fillRect(intersection(shadowRect, dirtyRect)); |
| } |
| } |
| |
| // Draw the shadow for the vertical overhang. |
| if (hasVerticalOverhang) { |
| RefPtr<Gradient> gradient; |
| IntRect shadowRect = verticalOverhangRect; |
| shadowRect.setWidth(kShadowSize); |
| if (scrollOffset.width() < 0) { |
| shadowRect.setX(verticalOverhangRect.maxX() - shadowRect.width()); |
| gradient = Gradient::create(FloatPoint(shadowRect.maxX(), 0), FloatPoint(shadowRect.x(), 0)); |
| } else { |
| gradient = Gradient::create(FloatPoint(shadowRect.x(), 0), FloatPoint(shadowRect.maxX(), 0)); |
| } |
| for (unsigned i = 0; i < kNumShadowColors; i++) |
| gradient->addColorStop(kShadowColors[i].stop, kShadowColors[i].color); |
| context->setFillGradient(gradient); |
| context->fillRect(intersection(shadowRect, dirtyRect)); |
| |
| // Draw a drop-shadow from the toolbar. |
| shadowRect = verticalOverhangRect; |
| shadowRect.setY(kToolbarShadowOffset); |
| shadowRect.setHeight(kShadowSize); |
| gradient = Gradient::create(FloatPoint(0, shadowRect.y()), FloatPoint(0, shadowRect.maxY())); |
| for (unsigned i = 0; i < kNumShadowColors; i++) |
| gradient->addColorStop(kShadowColors[i].stop, kShadowColors[i].color); |
| context->setFillGradient(gradient); |
| context->fillRect(intersection(shadowRect, dirtyRect)); |
| } |
| |
| // If both rectangles present, draw a radial gradient for the corner. |
| if (hasHorizontalOverhang && hasVerticalOverhang) { |
| RefPtr<Gradient> gradient = Gradient::create(shadowCornerOrigin, 0, shadowCornerOrigin, kShadowSize); |
| for (unsigned i = 0; i < kNumShadowColors; i++) |
| gradient->addColorStop(kShadowColors[i].stop, kShadowColors[i].color); |
| context->setFillGradient(gradient); |
| context->fillRect(FloatRect(shadowCornerOrigin.x() + shadowCornerOffset.x(), shadowCornerOrigin.y() + shadowCornerOffset.y(), kShadowSize, kShadowSize)); |
| } |
| } |
| |
| void ScrollbarThemeMacCommon::paintTickmarks(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect) |
| { |
| // Note: This is only used for css-styled scrollbars on mac. |
| if (scrollbar->orientation() != VerticalScrollbar) |
| return; |
| |
| if (rect.height() <= 0 || rect.width() <= 0) |
| return; |
| |
| Vector<IntRect> tickmarks; |
| scrollbar->getTickmarks(tickmarks); |
| if (!tickmarks.size()) |
| return; |
| |
| // Inset a bit. |
| IntRect tickmarkTrackRect = rect; |
| tickmarkTrackRect.setX(tickmarkTrackRect.x() + 1); |
| tickmarkTrackRect.setWidth(tickmarkTrackRect.width() - 2); |
| paintGivenTickmarks(context, scrollbar, tickmarkTrackRect, tickmarks); |
| } |
| |
| ScrollbarThemeMacCommon::~ScrollbarThemeMacCommon() |
| { |
| } |
| |
| void ScrollbarThemeMacCommon::preferencesChanged(float initialButtonDelay, float autoscrollButtonDelay, bool jumpOnTrackClick, bool redraw) |
| { |
| updateButtonPlacement(); |
| gInitialButtonDelay = initialButtonDelay; |
| gAutoscrollButtonDelay = autoscrollButtonDelay; |
| gJumpOnTrackClick = jumpOnTrackClick; |
| if (redraw && !scrollbarSet().isEmpty()) { |
| ScrollbarSet::iterator end = scrollbarSet().end(); |
| for (ScrollbarSet::iterator it = scrollbarSet().begin(); it != end; ++it) { |
| (*it)->styleChanged(); |
| (*it)->invalidate(); |
| } |
| } |
| } |
| |
| double ScrollbarThemeMacCommon::initialAutoscrollTimerDelay() |
| { |
| return gInitialButtonDelay; |
| } |
| |
| double ScrollbarThemeMacCommon::autoscrollTimerDelay() |
| { |
| return gAutoscrollButtonDelay; |
| } |
| |
| bool ScrollbarThemeMacCommon::shouldCenterOnThumb(ScrollbarThemeClient*, const PlatformMouseEvent& evt) |
| { |
| if (evt.button() != LeftButton) |
| return false; |
| if (gJumpOnTrackClick) |
| return !evt.altKey(); |
| return evt.altKey(); |
| } |
| |
| bool ScrollbarThemeMacCommon::shouldDragDocumentInsteadOfThumb(ScrollbarThemeClient*, const PlatformMouseEvent& event) |
| { |
| return event.altKey(); |
| } |
| |
| int ScrollbarThemeMacCommon::scrollbarPartToHIPressedState(ScrollbarPart part) |
| { |
| switch (part) { |
| case BackButtonStartPart: |
| return kThemeTopOutsideArrowPressed; |
| case BackButtonEndPart: |
| return kThemeTopOutsideArrowPressed; // This does not make much sense. For some reason the outside constant is required. |
| case ForwardButtonStartPart: |
| return kThemeTopInsideArrowPressed; |
| case ForwardButtonEndPart: |
| return kThemeBottomOutsideArrowPressed; |
| case ThumbPart: |
| return kThemeThumbPressed; |
| default: |
| return 0; |
| } |
| } |
| |
| } // namespace WebCore |