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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "config.h" |
| 6 #include "core/html/canvas/HitRegion.h" |
| 7 |
| 8 #include "core/accessibility/AXObjectCache.h" |
| 9 #include "core/rendering/RenderBoxModelObject.h" |
| 10 |
| 11 namespace WebCore { |
| 12 |
| 13 HitRegion::HitRegion(const HitRegionOptions& options) |
| 14 : m_id(options.id) |
| 15 , m_control(options.control) |
| 16 , m_path(options.path) |
| 17 { |
| 18 } |
| 19 |
| 20 void HitRegion::updateAccessibility(Element* canvas) |
| 21 { |
| 22 if (!m_control || !canvas || !canvas->renderer() || !m_control->isDescendant
Of(canvas)) |
| 23 return; |
| 24 |
| 25 AXObjectCache* axObjectCache = m_control->document().existingAXObjectCache()
; |
| 26 if (!axObjectCache) |
| 27 return; |
| 28 |
| 29 FloatRect boundingRect = m_path.boundingRect(); |
| 30 |
| 31 // Offset by the canvas rect, taking border and padding into account. |
| 32 RenderBoxModelObject* rbmo = canvas->renderBoxModelObject(); |
| 33 IntRect canvasRect = canvas->renderer()->absoluteBoundingBoxRect(); |
| 34 canvasRect.move(rbmo->borderLeft() + rbmo->paddingLeft(), |
| 35 rbmo->borderTop() + rbmo->paddingTop()); |
| 36 LayoutRect elementRect = enclosingLayoutRect(boundingRect); |
| 37 elementRect.moveBy(canvasRect.location()); |
| 38 |
| 39 axObjectCache->setCanvasObjectBounds(m_control.get(), elementRect); |
| 40 } |
| 41 |
| 42 bool HitRegion::contains(const LayoutPoint& point) const |
| 43 { |
| 44 if (!m_path.boundingRect().contains(point)) |
| 45 return false; |
| 46 |
| 47 return m_path.contains(point, RULE_NONZERO); |
| 48 } |
| 49 |
| 50 void HitRegion::removePixels(const Path& clearArea) |
| 51 { |
| 52 m_path.subtractPath(clearArea); |
| 53 } |
| 54 |
| 55 void HitRegion::trace(Visitor* visitor) |
| 56 { |
| 57 visitor->trace(m_control); |
| 58 } |
| 59 |
| 60 void HitRegionManager::addHitRegion(PassRefPtrWillBeRawPtr<HitRegion> passHitReg
ion) |
| 61 { |
| 62 RefPtrWillBeRawPtr<HitRegion> hitRegion = passHitRegion; |
| 63 |
| 64 m_hitRegionList.add(hitRegion); |
| 65 |
| 66 if (!hitRegion->id().isEmpty()) |
| 67 m_hitRegionIdMap.set(hitRegion->id(), hitRegion); |
| 68 |
| 69 if (hitRegion->control()) |
| 70 m_hitRegionControlMap.set(hitRegion->control(), hitRegion); |
| 71 } |
| 72 |
| 73 void HitRegionManager::removeHitRegion(HitRegion* hitRegion) |
| 74 { |
| 75 if (!hitRegion) |
| 76 return; |
| 77 |
| 78 if (!hitRegion->id().isEmpty()) |
| 79 m_hitRegionIdMap.remove(hitRegion->id()); |
| 80 |
| 81 if (hitRegion->control()) |
| 82 m_hitRegionControlMap.remove(hitRegion->control()); |
| 83 |
| 84 m_hitRegionList.remove(hitRegion); |
| 85 } |
| 86 |
| 87 void HitRegionManager::removeHitRegionById(const String& id) |
| 88 { |
| 89 if (!id.isEmpty()) |
| 90 removeHitRegion(getHitRegionById(id)); |
| 91 } |
| 92 |
| 93 void HitRegionManager::removeHitRegionByControl(Element* control) |
| 94 { |
| 95 removeHitRegion(getHitRegionByControl(control)); |
| 96 } |
| 97 |
| 98 void HitRegionManager::removeHitRegionsInRect(const FloatRect& rect, const Affin
eTransform& ctm) |
| 99 { |
| 100 Path clearArea; |
| 101 clearArea.addRect(rect); |
| 102 clearArea.transform(ctm); |
| 103 |
| 104 HitRegionIterator itEnd = m_hitRegionList.rend(); |
| 105 |
| 106 for (HitRegionIterator it = m_hitRegionList.rbegin(); it != itEnd; ++it) { |
| 107 RefPtrWillBeRawPtr<HitRegion> hitRegion = *it; |
| 108 hitRegion->removePixels(clearArea); |
| 109 if (hitRegion->path().isEmpty()) |
| 110 removeHitRegion(hitRegion.get()); |
| 111 } |
| 112 } |
| 113 |
| 114 void HitRegionManager::removeAllHitRegions() |
| 115 { |
| 116 m_hitRegionList.clear(); |
| 117 m_hitRegionIdMap.clear(); |
| 118 } |
| 119 |
| 120 HitRegion* HitRegionManager::getHitRegionById(const String& id) const |
| 121 { |
| 122 return m_hitRegionIdMap.get(id); |
| 123 } |
| 124 |
| 125 HitRegion* HitRegionManager::getHitRegionByControl(Element* control) const |
| 126 { |
| 127 if (control) |
| 128 return m_hitRegionControlMap.get(control); |
| 129 |
| 130 return 0; |
| 131 } |
| 132 |
| 133 HitRegion* HitRegionManager::getHitRegionAtPoint(const LayoutPoint& point) const |
| 134 { |
| 135 HitRegionIterator itEnd = m_hitRegionList.rend(); |
| 136 |
| 137 for (HitRegionIterator it = m_hitRegionList.rbegin(); it != itEnd; ++it) { |
| 138 RefPtrWillBeRawPtr<HitRegion> hitRegion = *it; |
| 139 if (hitRegion->contains(point)) |
| 140 return hitRegion.get(); |
| 141 } |
| 142 |
| 143 return 0; |
| 144 } |
| 145 |
| 146 unsigned HitRegionManager::getHitRegionsCount() const |
| 147 { |
| 148 return m_hitRegionList.size(); |
| 149 } |
| 150 |
| 151 void HitRegionManager::trace(Visitor* visitor) |
| 152 { |
| 153 visitor->trace(m_hitRegionList); |
| 154 visitor->trace(m_hitRegionIdMap); |
| 155 visitor->trace(m_hitRegionControlMap); |
| 156 } |
| 157 |
| 158 } // namespace WebCore |
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