| /* |
| * Copyright (C) 2008, 2009 Google 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "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 THE COPYRIGHT |
| * OWNER 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 "bindings/core/v8/V8NodeFilterCondition.h" |
| |
| #include "bindings/core/v8/ScriptController.h" |
| #include "bindings/core/v8/V8HiddenValue.h" |
| #include "bindings/core/v8/V8Node.h" |
| #include "core/dom/Node.h" |
| #include "core/dom/NodeFilter.h" |
| #include "wtf/OwnPtr.h" |
| |
| namespace blink { |
| |
| V8NodeFilterCondition::V8NodeFilterCondition(v8::Handle<v8::Value> filter, v8::Handle<v8::Object> owner, ScriptState* scriptState) |
| : m_scriptState(scriptState) |
| { |
| // ..acceptNode(..) will only dispatch m_filter if m_filter->IsObject(). |
| // We'll make sure m_filter is either usable by acceptNode or empty. |
| // (See the fast/dom/node-filter-gc test for a case where 'empty' happens.) |
| if (!filter.IsEmpty() && filter->IsObject()) { |
| V8HiddenValue::setHiddenValue(scriptState->isolate(), owner, V8HiddenValue::condition(scriptState->isolate()), filter); |
| m_filter.set(scriptState->isolate(), filter); |
| m_filter.setWeak(this, &setWeakCallback); |
| } |
| } |
| |
| V8NodeFilterCondition::~V8NodeFilterCondition() |
| { |
| } |
| |
| short V8NodeFilterCondition::acceptNode(Node* node, ExceptionState& exceptionState) const |
| { |
| v8::Isolate* isolate = m_scriptState->isolate(); |
| ASSERT(!m_scriptState->context().IsEmpty()); |
| v8::HandleScope handleScope(isolate); |
| v8::Handle<v8::Value> filter = m_filter.newLocal(isolate); |
| |
| ASSERT(filter.IsEmpty() || filter->IsObject()); |
| if (filter.IsEmpty()) |
| return NodeFilter::FILTER_ACCEPT; |
| |
| v8::TryCatch exceptionCatcher; |
| |
| v8::Handle<v8::Function> callback; |
| if (filter->IsFunction()) { |
| callback = v8::Handle<v8::Function>::Cast(filter); |
| } else { |
| v8::Local<v8::Value> value = filter->ToObject()->Get(v8AtomicString(isolate, "acceptNode")); |
| if (value.IsEmpty() || !value->IsFunction()) { |
| exceptionState.throwTypeError("NodeFilter object does not have an acceptNode function"); |
| return NodeFilter::FILTER_REJECT; |
| } |
| callback = v8::Handle<v8::Function>::Cast(value); |
| } |
| |
| OwnPtr<v8::Handle<v8::Value>[]> info = adoptArrayPtr(new v8::Handle<v8::Value>[1]); |
| v8::Handle<v8::Object> context = m_scriptState->context()->Global(); |
| info[0] = toV8(node, context, isolate); |
| |
| v8::Handle<v8::Value> result = ScriptController::callFunction(m_scriptState->executionContext(), callback, context, 1, info.get(), isolate); |
| |
| if (exceptionCatcher.HasCaught()) { |
| exceptionState.rethrowV8Exception(exceptionCatcher.Exception()); |
| return NodeFilter::FILTER_REJECT; |
| } |
| |
| ASSERT(!result.IsEmpty()); |
| |
| return result->Int32Value(); |
| } |
| |
| void V8NodeFilterCondition::setWeakCallback(const v8::WeakCallbackData<v8::Value, V8NodeFilterCondition>& data) |
| { |
| data.GetParameter()->m_filter.clear(); |
| } |
| |
| } // namespace blink |