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
|
/*
* This file is part of LibNSLayout
* Licensed under the ISC License, http://opensource.org/licenses/ISC
* Copyright 2015 Michael Drake <tlsa@netsurf-browser.org>
*/
/** \file src/dom/event.c
* DOM mutation handling
*/
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "layout.h"
#include "dom/event.h"
#include "util/dom-str.h"
#include "util/util.h"
static const char *nsl__dom_node_type_to_string(dom_node_type type)
{
const char *str[] = {
"ELEMENT_NODE",
"ATTRIBUTE_NODE",
"TEXT_NODE",
"CDATA_SECTION_NODE",
"ENTITY_REFERENCE_NODE",
"ENTITY_NODE",
"PROCESSING_INSTRUCTION_NODE",
"COMMENT_NODE",
"DOCUMENT_NODE",
"DOCUMENT_TYPE_NODE",
"DOCUMENT_FRAGMENT_NODE",
"NOTATION_NODE"
};
assert(DOM_NODE_TYPE_COUNT == 12);
return str[type - 1];
}
static void nsl__dom_event_handler(struct dom_event *evt, void *pw)
{
dom_event_target *node = NULL;
dom_node_type node_type;
dom_string *name = NULL;
dom_string *type = NULL;
dom_exception exc;
UNUSED(pw);
printf(" DOM Event: ");
/* Ugly test to see what events come out */
exc = dom_event_get_target(evt, &node);
if ((exc != DOM_NO_ERR) || (node == NULL)) {
printf("FAILED to get target node!\n");
goto fail;
}
exc = dom_node_get_node_type(node, &node_type);
if (exc != DOM_NO_ERR) {
printf("FAILED to get target node type!\n");
goto fail;
}
if (node_type == DOM_ELEMENT_NODE) {
exc = dom_node_get_node_name(node, &name);
if ((exc != DOM_NO_ERR) || (name == NULL)) {
printf("FAILED to get target node name!\n");
goto fail;
}
}
exc = dom_event_get_type(evt, &type);
if ((exc != DOM_NO_ERR) || (type == NULL)) {
printf("FAILED to get event type!\n");
goto fail;
}
if (node_type == DOM_ELEMENT_NODE) {
printf("<%s> %s",
dom_string_data(name),
dom_string_data(type));
} else {
printf("%s %s",
nsl__dom_node_type_to_string(node_type),
dom_string_data(type));
}
fail:
if (type != NULL) dom_string_unref(type);
if (name != NULL) dom_string_unref(name);
if (node != NULL) dom_node_unref(node);
printf("\n");
}
/* Exported function, documented in src/dom/event.h */
nslayout_error nsl_dom_event_layout_init(nslayout_layout *layout)
{
dom_exception exc;
/* TODO: LibDOM even listeners are really slow. Need to find a better
* way to get DOM change notifications.
*/
exc = dom_event_listener_create(layout->doc, nsl__dom_event_handler,
layout, &layout->listener);
if (exc != DOM_NO_ERR) {
/* TODO: free stuff, return value */
printf("Failed to register event handler!\n");
return NSLAYOUT_NO_MEM;
}
exc = dom_event_target_add_event_listener(
layout->doc, nsl_dom_str_node_inserted,
layout->listener, false);
if (exc != DOM_NO_ERR) {
/* TODO: free stuff, return value */
printf("Failed to register event handler!\n");
return NSLAYOUT_NO_MEM;
}
exc = dom_event_target_add_event_listener(
layout->doc, nsl_dom_str_subtree_modified,
layout->listener, false);
if (exc != DOM_NO_ERR) {
/* TODO: free stuff, return value */
printf("Failed to register event handler!\n");
return NSLAYOUT_NO_MEM;
}
return NSLAYOUT_OK;
}
/* Exported function, documented in src/dom/event.h */
nslayout_error nsl_dom_event_layout_fini(nslayout_layout *layout)
{
dom_exception exc;
exc = dom_event_target_remove_event_listener(
layout->doc, nsl_dom_str_node_inserted,
layout->listener, false);
if (exc != DOM_NO_ERR) {
/* TODO: free stuff, return value */
printf("Failed to remove event handler!\n");
return NSLAYOUT_NO_MEM;
}
exc = dom_event_target_remove_event_listener(
layout->doc, nsl_dom_str_subtree_modified,
layout->listener, false);
if (exc != DOM_NO_ERR) {
/* TODO: free stuff, return value */
printf("Failed to remove event handler!\n");
return NSLAYOUT_NO_MEM;
}
dom_event_listener_unref(layout->listener);
return NSLAYOUT_OK;
}
|
