1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_EVENTS_H__
#define V8_EVENTS_H__
#include "config.h"
#include <v8.h>
#include "Frame.h"
#include "Event.h"
#include "EventListener.h"
#include "PlatformString.h"
// #define IF_DEVEL(stmt) stmt
#define IF_DEVEL(stmt) ((void) 0)
namespace WebCore {
// There are two kinds of event listeners: HTML or non-HMTL.
// onload, onfocus, etc (attributes) are always HTML event handler type;
// Event listeners added by Window.addEventListener
// or EventTargetNode::addEventListener are non-HTML type.
//
// Why does this matter?
// WebKit does not allow duplicated HTML event handlers of the same type,
// but ALLOWs duplicated non-HTML event handlers.
class V8AbstractEventListener : public EventListener {
public:
virtual ~V8AbstractEventListener() { }
// Returns the owner frame of the listener.
Frame* frame() { return m_frame; }
// Handle event.
void handleEvent(Event*, bool isWindowEvent);
// Returns the listener object, either a function or an object.
virtual v8::Local<v8::Object> GetListenerObject() {
return v8::Local<v8::Object>::New(m_listener);
}
// Dispose listener object and clear the handle
void DisposeListenerObject();
private:
V8AbstractEventListener(Frame* frame, bool isInline);
// Call listener function.
virtual v8::Local<v8::Value>
CallListenerFunction(v8::Handle<v8::Value> jsevent,
Event* event, bool isWindowEvent) = 0;
// Frame to which the event listener is attached to.
// An event listener must be destroyed before its owner
// frame is deleted.
// See fast/dom/replaceChild.html
// TODO(fqian): this could hold m_frame live until
// the event listener is deleted. Fix this!
Frame* m_frame;
// Listener object.
v8::Persistent<v8::Object> m_listener;
// Flags this is a HTML type listener.
bool m_isInline;
// Position in the HTML source for HTML event listeners.
int m_lineNumber;
int m_columnNumber;
friend class V8EventListener;
friend class V8ObjectEventListener;
friend class V8LazyEventListener;
};
// V8EventListener is a wrapper of a JS object implements EventListener
// interface (has handleEvent(event) method), or a JS function
// that can handle the event.
class V8EventListener : public V8AbstractEventListener {
public:
static PassRefPtr<V8EventListener> create(Frame* frame,
v8::Local<v8::Object> listener, bool isInline) {
return adoptRef(new V8EventListener(frame, listener, isInline));
}
V8EventListener(Frame* frame, v8::Local<v8::Object> listener, bool isInline);
virtual ~V8EventListener();
virtual bool isInline() const { return m_isInline; }
// Detach the listener from its owner frame.
void disconnectFrame() { m_frame = 0; }
private:
// Call listener function.
virtual v8::Local<v8::Value> CallListenerFunction(
v8::Handle<v8::Value> jsevent, Event* event, bool isWindowEvent);
v8::Local<v8::Object> GetThisObject(Event* event, bool isWindowEvent);
v8::Local<v8::Function> GetListenerFunction();
};
// V8ObjectEventListener is a special listener wrapper for objects not
// in the DOM. It keeps the JS listener as a weak pointer.
class V8ObjectEventListener : public V8EventListener {
public:
static PassRefPtr<V8ObjectEventListener> create(Frame* frame,
v8::Local<v8::Object> listener, bool isInline) {
return adoptRef(new V8ObjectEventListener(frame, listener, isInline));
}
V8ObjectEventListener(Frame* frame, v8::Local<v8::Object> listener,
bool isInline);
virtual ~V8ObjectEventListener();
};
// V8LazyEventListener is a wrapper for a JavaScript code string that is
// compiled and evaluated when an event is fired.
// A V8LazyEventListener is always a HTML event handler.
class V8LazyEventListener : public V8AbstractEventListener {
public:
static PassRefPtr<V8LazyEventListener> create(Frame* frame,
const String& code, const String& func_name) {
return adoptRef(new V8LazyEventListener(frame, code, func_name));
}
V8LazyEventListener(Frame *frame, const String& code,
const String& func_name);
virtual ~V8LazyEventListener();
virtual bool isInline() const { return true; }
// For lazy event listener, the listener object is the same as its listener
// function without additional scope chains.
virtual v8::Local<v8::Object> GetListenerObject() {
return GetWrappedListenerFunction();
}
private:
String m_code;
String m_func_name; // function name
bool m_compiled;
// If the event listener is on a non-document dom node,
// we compile the function with some implicit scope chains before it.
bool m_wrapped_function_compiled;
v8::Persistent<v8::Function> m_wrapped_function;
v8::Local<v8::Function> GetWrappedListenerFunction();
virtual v8::Local<v8::Value> CallListenerFunction(
v8::Handle<v8::Value> jsevent, Event* event, bool isWindowEvent);
v8::Local<v8::Object> GetThisObject(Event* event, bool isWindowEvent);
v8::Local<v8::Function> GetListenerFunction();
};
} // namespace WebCore
#endif // V8_EVENTS_H__
|
