webext-surf.c - surf - [fork] surf browser, a WebKit based browser
HTML git clone https://git.drkhsh.at/surf.git
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
webext-surf.c (3687B)
---
1 #include <sys/socket.h>
2 #include <sys/stat.h>
3 #include <fcntl.h>
4 #include <inttypes.h>
5 #include <limits.h>
6 #include <stdio.h>
7 #include <stdlib.h>
8
9 #include <gio/gio.h>
10 #include <gio/gunixfdlist.h>
11 #include <webkit2/webkit-web-extension.h>
12 #include <webkitdom/webkitdom.h>
13 #include <webkitdom/WebKitDOMDOMWindowUnstable.h>
14
15 #include "common.h"
16
17 #define LENGTH(x) (sizeof(x) / sizeof(x[0]))
18
19 static WebKitWebExtension *webext;
20 static int sock;
21
22 /*
23 * Return:
24 * 0 No data processed: need more data
25 * > 0 Amount of data processed or discarded
26 */
27 static size_t
28 evalmsg(char *msg, size_t sz)
29 {
30 char js[48];
31 WebKitWebPage *page;
32 JSCContext *jsc;
33 JSCValue *jsv;
34
35 if (!(page = webkit_web_extension_get_page(webext, msg[0])))
36 return sz;
37
38 if (sz < 2)
39 return 0;
40
41 jsc = webkit_frame_get_js_context(webkit_web_page_get_main_frame(page));
42 jsv = NULL;
43
44 switch (msg[1]) {
45 case 'h':
46 if (sz < 3) {
47 sz = 0;
48 break;
49 }
50 sz = 3;
51 snprintf(js, sizeof(js),
52 "window.scrollBy(window.innerWidth/100*%hhd,0);",
53 msg[2]);
54 jsv = jsc_context_evaluate(jsc, js, -1);
55 break;
56 case 'v':
57 if (sz < 3) {
58 sz = 0;
59 break;
60 }
61 sz = 3;
62 snprintf(js, sizeof(js),
63 "window.scrollBy(0,window.innerHeight/100*%hhd);",
64 msg[2]);
65 jsv = jsc_context_evaluate(jsc, js, -1);
66 break;
67 default:
68 fprintf(stderr, "%s:%d:evalmsg: unknown cmd(%zu): '%#x'\n",
69 __FILE__, __LINE__, sz, msg[1]);
70 }
71
72 g_object_unref(jsc);
73 if (jsv)
74 g_object_unref(jsv);
75
76 return sz;
77 }
78
79 static gboolean
80 readsock(GIOChannel *s, GIOCondition c, gpointer unused)
81 {
82 static char msg[MSGBUFSZ];
83 static size_t msgoff;
84 GError *gerr = NULL;
85 size_t sz;
86 gsize rsz;
87
88 if (g_io_channel_read_chars(s, msg+msgoff, sizeof(msg)-msgoff, &rsz, &gerr) !=
89 G_IO_STATUS_NORMAL) {
90 if (gerr) {
91 fprintf(stderr, "webext: error reading socket: %s\n",
92 gerr->message);
93 g_error_free(gerr);
94 }
95 return TRUE;
96 }
97 if (msgoff >= sizeof(msg)) {
98 fprintf(stderr, "%s:%d:%s: msgoff: %zu", __FILE__, __LINE__, __func__, msgoff);
99 return FALSE;
100 }
101
102 for (rsz += msgoff; rsz; rsz -= sz) {
103 sz = evalmsg(msg, rsz);
104 if (sz == 0) {
105 /* need more data */
106 break;
107 }
108 if (sz != rsz) {
109 /* continue processing message */
110 memmove(msg, msg+sz, rsz-sz);
111 }
112 }
113 msgoff = rsz;
114
115 return TRUE;
116 }
117
118 static void
119 pageusermessagereply(GObject *o, GAsyncResult *r, gpointer page)
120 {
121 WebKitUserMessage *m;
122 GUnixFDList *gfd;
123 GIOChannel *gchansock;
124 const char *name;
125 int nfd;
126
127 m = webkit_web_page_send_message_to_view_finish(page, r, NULL);
128 name = webkit_user_message_get_name(m);
129 if (strcmp(name, "surf-pipe") != 0) {
130 fprintf(stderr, "webext-surf: Unknown User Reply: %s\n", name);
131 return;
132 }
133
134 gfd = webkit_user_message_get_fd_list(m);
135 if ((nfd = g_unix_fd_list_get_length(gfd)) != 1) {
136 fprintf(stderr, "webext-surf: Too many file-descriptors: %d\n", nfd);
137 return;
138 }
139
140 sock = g_unix_fd_list_get(gfd, 0, NULL);
141
142 gchansock = g_io_channel_unix_new(sock);
143 g_io_channel_set_encoding(gchansock, NULL, NULL);
144 g_io_channel_set_flags(gchansock, g_io_channel_get_flags(gchansock)
145 | G_IO_FLAG_NONBLOCK, NULL);
146 g_io_channel_set_close_on_unref(gchansock, TRUE);
147 g_io_add_watch(gchansock, G_IO_IN, readsock, NULL);
148 }
149
150 void
151 pagecreated(WebKitWebExtension *e, WebKitWebPage *p, gpointer unused)
152 {
153 WebKitUserMessage *msg;
154
155 msg = webkit_user_message_new("page-created", NULL);
156 webkit_web_page_send_message_to_view(p, msg, NULL, pageusermessagereply, p);
157 }
158
159 G_MODULE_EXPORT void
160 webkit_web_extension_initialize(WebKitWebExtension *e)
161 {
162 webext = e;
163
164 g_signal_connect(G_OBJECT(e), "page-created",
165 G_CALLBACK(pagecreated), NULL);
166 }