Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above |
| 9 | * copyright notice, this list of conditions and the following |
| 10 | * disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above |
| 12 | * copyright notice, this list of conditions and the following |
| 13 | * disclaimer in the documentation and/or other materials |
| 14 | * provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY |
| 17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE |
| 20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| 21 | * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 23 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| 25 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
| 26 | * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include "config.h" |
| 31 | #include "core/dom/NamedFlow.h" |
| 32 | |
| 33 | #include "RuntimeEnabledFeatures.h" |
| 34 | #include "core/dom/EventNames.h" |
| 35 | #include "core/dom/NamedFlowCollection.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 36 | #include "core/dom/StaticNodeList.h" |
| 37 | #include "core/dom/UIEvent.h" |
| 38 | #include "core/rendering/RenderNamedFlowThread.h" |
| 39 | #include "core/rendering/RenderRegion.h" |
| 40 | |
| 41 | namespace WebCore { |
| 42 | |
| 43 | NamedFlow::NamedFlow(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName) |
| 44 | : m_flowThreadName(flowThreadName) |
| 45 | , m_flowManager(manager) |
| 46 | , m_parentFlowThread(0) |
| 47 | { |
| 48 | ASSERT(RuntimeEnabledFeatures::cssRegionsEnabled()); |
Torne (Richard Coles) | 93ac45c | 2013-05-29 14:40:20 +0100 | [diff] [blame] | 49 | ScriptWrappable::init(this); |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 50 | } |
| 51 | |
| 52 | NamedFlow::~NamedFlow() |
| 53 | { |
| 54 | // The named flow is not "strong" referenced from anywhere at this time so it shouldn't be reused if the named flow is recreated. |
| 55 | m_flowManager->discardNamedFlow(this); |
| 56 | } |
| 57 | |
| 58 | PassRefPtr<NamedFlow> NamedFlow::create(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName) |
| 59 | { |
| 60 | return adoptRef(new NamedFlow(manager, flowThreadName)); |
| 61 | } |
| 62 | |
| 63 | const AtomicString& NamedFlow::name() const |
| 64 | { |
| 65 | return m_flowThreadName; |
| 66 | } |
| 67 | |
| 68 | bool NamedFlow::overset() const |
| 69 | { |
| 70 | if (m_flowManager->document()) |
| 71 | m_flowManager->document()->updateLayoutIgnorePendingStylesheets(); |
| 72 | |
| 73 | // The renderer may be destroyed or created after the style update. |
| 74 | // Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary. |
| 75 | return m_parentFlowThread ? m_parentFlowThread->overset() : true; |
| 76 | } |
| 77 | |
| 78 | static inline bool inFlowThread(RenderObject* renderer, RenderNamedFlowThread* flowThread) |
| 79 | { |
| 80 | if (!renderer) |
| 81 | return false; |
| 82 | RenderFlowThread* currentFlowThread = renderer->flowThreadContainingBlock(); |
| 83 | if (flowThread == currentFlowThread) |
| 84 | return true; |
| 85 | if (renderer->flowThreadState() != RenderObject::InsideInFlowThread) |
| 86 | return false; |
| 87 | |
| 88 | // An in-flow flow thread can be nested inside an out-of-flow one, so we have to recur up to check. |
| 89 | return inFlowThread(currentFlowThread->containingBlock(), flowThread); |
| 90 | } |
| 91 | |
| 92 | int NamedFlow::firstEmptyRegionIndex() const |
| 93 | { |
| 94 | if (m_flowManager->document()) |
| 95 | m_flowManager->document()->updateLayoutIgnorePendingStylesheets(); |
| 96 | |
| 97 | if (!m_parentFlowThread) |
| 98 | return -1; |
| 99 | |
| 100 | const RenderRegionList& regionList = m_parentFlowThread->renderRegionList(); |
| 101 | if (regionList.isEmpty()) |
| 102 | return -1; |
| 103 | RenderRegionList::const_iterator iter = regionList.begin(); |
| 104 | for (int index = 0; iter != regionList.end(); ++index, ++iter) { |
| 105 | const RenderRegion* renderRegion = *iter; |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 106 | if (renderRegion->regionOversetState() == RegionEmpty) |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 107 | return index; |
| 108 | } |
| 109 | return -1; |
| 110 | } |
| 111 | |
| 112 | PassRefPtr<NodeList> NamedFlow::getRegionsByContent(Node* contentNode) |
| 113 | { |
| 114 | Vector<RefPtr<Node> > regionNodes; |
| 115 | |
| 116 | if (!contentNode) |
| 117 | return StaticNodeList::adopt(regionNodes); |
| 118 | |
| 119 | if (m_flowManager->document()) |
| 120 | m_flowManager->document()->updateLayoutIgnorePendingStylesheets(); |
| 121 | |
| 122 | // The renderer may be destroyed or created after the style update. |
| 123 | // Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary. |
| 124 | if (!m_parentFlowThread) |
| 125 | return StaticNodeList::adopt(regionNodes); |
| 126 | |
| 127 | if (inFlowThread(contentNode->renderer(), m_parentFlowThread)) { |
| 128 | const RenderRegionList& regionList = m_parentFlowThread->renderRegionList(); |
| 129 | for (RenderRegionList::const_iterator iter = regionList.begin(); iter != regionList.end(); ++iter) { |
| 130 | const RenderRegion* renderRegion = *iter; |
| 131 | // FIXME: Pseudo-elements are not included in the list. |
| 132 | if (!renderRegion->node()) |
| 133 | continue; |
| 134 | if (m_parentFlowThread->objectInFlowRegion(contentNode->renderer(), renderRegion)) |
| 135 | regionNodes.append(renderRegion->node()); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | return StaticNodeList::adopt(regionNodes); |
| 140 | } |
| 141 | |
| 142 | PassRefPtr<NodeList> NamedFlow::getRegions() |
| 143 | { |
| 144 | Vector<RefPtr<Node> > regionNodes; |
| 145 | |
| 146 | if (m_flowManager->document()) |
| 147 | m_flowManager->document()->updateLayoutIgnorePendingStylesheets(); |
| 148 | |
| 149 | // The renderer may be destroyed or created after the style update. |
| 150 | // Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary. |
| 151 | if (!m_parentFlowThread) |
| 152 | return StaticNodeList::adopt(regionNodes); |
| 153 | |
| 154 | const RenderRegionList& regionList = m_parentFlowThread->renderRegionList(); |
| 155 | for (RenderRegionList::const_iterator iter = regionList.begin(); iter != regionList.end(); ++iter) { |
| 156 | const RenderRegion* renderRegion = *iter; |
| 157 | // FIXME: Pseudo-elements are not included in the list. |
| 158 | if (!renderRegion->node()) |
| 159 | continue; |
| 160 | regionNodes.append(renderRegion->node()); |
| 161 | } |
| 162 | |
| 163 | return StaticNodeList::adopt(regionNodes); |
| 164 | } |
| 165 | |
| 166 | PassRefPtr<NodeList> NamedFlow::getContent() |
| 167 | { |
| 168 | Vector<RefPtr<Node> > contentNodes; |
| 169 | |
| 170 | if (m_flowManager->document()) |
| 171 | m_flowManager->document()->updateLayoutIgnorePendingStylesheets(); |
| 172 | |
| 173 | // The renderer may be destroyed or created after the style update. |
| 174 | // Because this is called from JS, where the wrapper keeps a reference to the NamedFlow, no guard is necessary. |
| 175 | if (!m_parentFlowThread) |
| 176 | return StaticNodeList::adopt(contentNodes); |
| 177 | |
| 178 | const NamedFlowContentNodes& contentNodesList = m_parentFlowThread->contentNodes(); |
| 179 | for (NamedFlowContentNodes::const_iterator it = contentNodesList.begin(); it != contentNodesList.end(); ++it) { |
| 180 | Node* node = *it; |
| 181 | ASSERT(node->computedStyle()->flowThread() == m_parentFlowThread->flowThreadName()); |
| 182 | contentNodes.append(node); |
| 183 | } |
| 184 | |
| 185 | return StaticNodeList::adopt(contentNodes); |
| 186 | } |
| 187 | |
| 188 | void NamedFlow::setRenderer(RenderNamedFlowThread* parentFlowThread) |
| 189 | { |
| 190 | // The named flow can either go from a no_renderer->renderer or renderer->no_renderer state; anything else could indicate a bug. |
| 191 | ASSERT((!m_parentFlowThread && parentFlowThread) || (m_parentFlowThread && !parentFlowThread)); |
| 192 | |
| 193 | // If parentFlowThread is 0, the flow thread will move in the "NULL" state. |
| 194 | m_parentFlowThread = parentFlowThread; |
| 195 | } |
| 196 | |
| 197 | EventTargetData* NamedFlow::eventTargetData() |
| 198 | { |
| 199 | return &m_eventTargetData; |
| 200 | } |
| 201 | |
| 202 | EventTargetData* NamedFlow::ensureEventTargetData() |
| 203 | { |
| 204 | return &m_eventTargetData; |
| 205 | } |
| 206 | |
| 207 | void NamedFlow::dispatchRegionLayoutUpdateEvent() |
| 208 | { |
| 209 | ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden()); |
| 210 | |
| 211 | // If the flow is in the "NULL" state the event should not be dispatched any more. |
| 212 | if (flowState() == FlowStateNull) |
| 213 | return; |
| 214 | |
| 215 | RefPtr<Event> event = UIEvent::create(eventNames().webkitregionlayoutupdateEvent, false, false, m_flowManager->document()->defaultView(), 0); |
| 216 | |
| 217 | dispatchEvent(event); |
| 218 | } |
| 219 | |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 220 | void NamedFlow::dispatchRegionOversetChangeEvent() |
| 221 | { |
| 222 | ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden()); |
| 223 | |
| 224 | // If the flow is in the "NULL" state the event should not be dispatched any more. |
| 225 | if (flowState() == FlowStateNull) |
| 226 | return; |
| 227 | |
| 228 | RefPtr<Event> event = UIEvent::create(eventNames().webkitregionoversetchangeEvent, false, false, m_flowManager->document()->defaultView(), 0); |
| 229 | |
| 230 | dispatchEvent(event); |
| 231 | } |
| 232 | |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 233 | const AtomicString& NamedFlow::interfaceName() const |
| 234 | { |
| 235 | return eventNames().interfaceForNamedFlow; |
| 236 | } |
| 237 | |
| 238 | ScriptExecutionContext* NamedFlow::scriptExecutionContext() const |
| 239 | { |
| 240 | return m_flowManager->document(); |
| 241 | } |
| 242 | |
| 243 | Node* NamedFlow::ownerNode() const |
| 244 | { |
| 245 | return m_flowManager->document(); |
| 246 | } |
| 247 | |
| 248 | } // namespace WebCore |
| 249 | |