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| 1 /* | 1 /* |
| 2 * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved. | 2 * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
| (...skipping 13 matching lines...) Expand all Loading... |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ | 29 */ |
| 30 | 30 |
| 31 #ifndef V8NodeFilterCondition_h | 31 #ifndef V8NodeFilterCondition_h |
| 32 #define V8NodeFilterCondition_h | 32 #define V8NodeFilterCondition_h |
| 33 | 33 |
| 34 #include "bindings/v8/NewScriptState.h" |
| 34 #include "bindings/v8/ScopedPersistent.h" | 35 #include "bindings/v8/ScopedPersistent.h" |
| 35 #include "core/dom/NodeFilterCondition.h" | 36 #include "core/dom/NodeFilterCondition.h" |
| 36 #include <v8.h> | 37 #include <v8.h> |
| 37 #include "wtf/PassRefPtr.h" | 38 #include "wtf/PassRefPtr.h" |
| 38 | 39 |
| 39 namespace WebCore { | 40 namespace WebCore { |
| 40 | 41 |
| 41 class Node; | 42 class Node; |
| 42 class ScriptState; | 43 class ExceptionState; |
| 43 | 44 |
| 44 // V8NodeFilterCondition maintains a Javascript implemented callback for | 45 // V8NodeFilterCondition maintains a Javascript implemented callback for |
| 45 // filtering Node returned by NodeIterator/TreeWalker. | 46 // filtering Node returned by NodeIterator/TreeWalker. |
| 46 // A NodeFilterCondition is referenced by a NodeFilter, and A NodeFilter is | 47 // A NodeFilterCondition is referenced by a NodeFilter, and A NodeFilter is |
| 47 // referenced by a NodeIterator/TreeWalker. As V8NodeFilterCondition maintains | 48 // referenced by a NodeIterator/TreeWalker. As V8NodeFilterCondition maintains |
| 48 // a Javascript callback which may reference Document, we need to avoid circular | 49 // a Javascript callback which may reference Document, we need to avoid circular |
| 49 // reference spanning V8/Blink object space. | 50 // reference spanning V8/Blink object space. |
| 50 // To address this issue, V8NodeFilterCondition holds a weak reference to | 51 // To address this issue, V8NodeFilterCondition holds a weak reference to |
| 51 // |m_filter|, the Javascript value, and the whole reference is exposed to V8 to | 52 // |m_filter|, the Javascript value, and the whole reference is exposed to V8 to |
| 52 // let V8 GC handle collection of |m_filter|. | 53 // let V8 GC handle collection of |m_filter|. |
| 53 // (DOM) | 54 // (DOM) |
| 54 // NodeIterator ----RefPtr----> NodeFilter ----RefPtr----> NodeFilterCondition | 55 // NodeIterator ----RefPtr----> NodeFilter ----RefPtr----> NodeFilterCondition |
| 55 // | ^ | ^ | | 56 // | ^ | ^ | |
| 56 // weak | weak | ScopedPersistent(weak) | 57 // weak | weak | ScopedPersistent(weak) |
| 57 // | RefPtr | RefPtr | | 58 // | RefPtr | RefPtr | |
| 58 // v | v | v | 59 // v | v | v |
| 59 // NodeIterator --HiddenValue--> NodeFilter --HiddenValue--> JS Callback | 60 // NodeIterator --HiddenValue--> NodeFilter --HiddenValue--> JS Callback |
| 60 // (V8) | 61 // (V8) |
| 61 class V8NodeFilterCondition FINAL : public NodeFilterCondition { | 62 class V8NodeFilterCondition FINAL : public NodeFilterCondition { |
| 62 public: | 63 public: |
| 63 static PassRefPtr<V8NodeFilterCondition> create(v8::Handle<v8::Value> filter
, v8::Handle<v8::Object> owner, v8::Isolate* isolate) | 64 static PassRefPtr<V8NodeFilterCondition> create(v8::Handle<v8::Value> filter
, v8::Handle<v8::Object> owner, v8::Isolate* isolate) |
| 64 { | 65 { |
| 65 return adoptRef(new V8NodeFilterCondition(filter, owner, isolate)); | 66 return adoptRef(new V8NodeFilterCondition(filter, owner, isolate)); |
| 66 } | 67 } |
| 67 | 68 |
| 68 virtual ~V8NodeFilterCondition(); | 69 virtual ~V8NodeFilterCondition(); |
| 69 | 70 |
| 70 virtual short acceptNode(ScriptState*, Node*) const OVERRIDE; | 71 virtual short acceptNode(Node*, ExceptionState&) const OVERRIDE; |
| 71 | 72 |
| 72 private: | 73 private: |
| 73 // As the value |filter| is maintained by V8GC, the |owner| which references | 74 // As the value |filter| is maintained by V8GC, the |owner| which references |
| 74 // V8NodeFilterCondition, usually a wrapper of NodeFilter, is specified here | 75 // V8NodeFilterCondition, usually a wrapper of NodeFilter, is specified here |
| 75 // to hold a strong reference to |filter|. | 76 // to hold a strong reference to |filter|. |
| 76 V8NodeFilterCondition(v8::Handle<v8::Value> filter, v8::Handle<v8::Object> o
wner, v8::Isolate*); | 77 V8NodeFilterCondition(v8::Handle<v8::Value> filter, v8::Handle<v8::Object> o
wner, v8::Isolate*); |
| 77 | 78 |
| 78 static void setWeakCallback(const v8::WeakCallbackData<v8::Value, V8NodeFilt
erCondition>&); | 79 static void setWeakCallback(const v8::WeakCallbackData<v8::Value, V8NodeFilt
erCondition>&); |
| 79 | 80 |
| 81 RefPtr<NewScriptState> m_scriptState; |
| 80 ScopedPersistent<v8::Value> m_filter; | 82 ScopedPersistent<v8::Value> m_filter; |
| 81 }; | 83 }; |
| 82 | 84 |
| 83 } // namespace WebCore | 85 } // namespace WebCore |
| 84 | 86 |
| 85 #endif // V8NodeFilterCondition_h | 87 #endif // V8NodeFilterCondition_h |
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