libsurf-webext.c

   1 #include <sys/stat.h>
   2 #include <fcntl.h>
   3 #include <limits.h>
   4 #include <stdlib.h>
   5
   6 #include <gio/gio.h>
   7 #include <webkit2/webkit-web-extension.h>
   8 #include <webkitdom/webkitdom.h>
   9 #include <webkitdom/WebKitDOMDOMWindowUnstable.h>
  10
  11 #include "common.h"
  12
  13 #define LENGTH(x)   (sizeof(x) / sizeof(x[0]))
  14
  15 typedef struct Page {
  16         guint64 id;
  17         WebKitWebPage *webpage;
  18         struct Page *next;
  19 } Page;
  20
  21 static int pipein, pipeout;
  22 static Page *pages;
  23
  24 Page *
  25 newpage(WebKitWebPage *page)
  26 {
  27         Page *p;
  28
  29         if (!(p = calloc(1, sizeof(Page))))
  30                 die("Cannot malloc!\n");
  31
  32         p->next = pages;
  33         pages = p;
  34
  35         p->id = webkit_web_page_get_id(page);
  36         p->webpage = page;
  37
  38         return p;
  39 }
  40
  41 static void
  42 msgsurf(Page *p, const char *s)
  43 {
  44         char msg[MSGBUFSZ];
  45         int ret;
  46
  47         msg[0] = p ? p->id : 0;
  48         ret = snprintf(&msg[1], sizeof(msg) - 1, "%s", s);
  49         if (ret >= sizeof(msg)) {
  50                 fprintf(stderr, "webext: message too long: %d\n", ret);
  51                 return;
  52         }
  53
  54         if (pipeout) {
  55                 if (write(pipeout, msg, sizeof(msg)) < 0)
  56                         fprintf(stderr, "webext: error sending: %s\n", msg);
  57         }
  58 }
  59
  60 static gboolean
  61 readpipe(GIOChannel *s, GIOCondition c, gpointer unused)
  62 {
  63         char msg[MSGBUFSZ];
  64         gsize msgsz;
  65         WebKitDOMDOMWindow *view;
  66         GError *gerr = NULL;
  67         glong wh, ww;
  68         Page *p;
  69
  70         if (g_io_channel_read_chars(s, msg, LENGTH(msg), &msgsz, &gerr) !=
  71             G_IO_STATUS_NORMAL) {
  72                 fprintf(stderr, "webext: error reading pipe: %s\n",
  73                         gerr->message);
  74                 g_error_free(gerr);
  75                 return TRUE;
  76         }
  77         msg[msgsz] = '\0';
  78
  79         for (p = pages; p; p = p->next) {
  80                 if (p->id == msg[0])
  81                         break;
  82         }
  83         if (!p || !(view = webkit_dom_document_get_default_view(
  84                     webkit_web_page_get_dom_document(p->webpage))))
  85                 return TRUE;
  86
  87         switch (msg[1]) {
  88         case 'h':
  89                 ww = webkit_dom_dom_window_get_inner_width(view);
  90                 webkit_dom_dom_window_scroll_by(view,
  91                                                 (ww / 100) * msg[2], 0);
  92                 break;
  93         case 'v':
  94                 wh = webkit_dom_dom_window_get_inner_height(view);
  95                 webkit_dom_dom_window_scroll_by(view,
  96                                                 0, (wh / 100) * msg[2]);
  97                 break;
  98         }
  99
 100         return TRUE;
 101 }
 102
 103 static void
 104 webpagecreated(WebKitWebExtension *e, WebKitWebPage *wp, gpointer unused)
 105 {
 106         Page *p = newpage(wp);
 107 }
 108
 109 G_MODULE_EXPORT void
 110 webkit_web_extension_initialize_with_user_data(WebKitWebExtension *e, GVariant *gv)
 111 {
 112         GIOChannel *gchanpipe;
 113
 114         g_signal_connect(e, "page-created", G_CALLBACK(webpagecreated), NULL);
 115
 116         g_variant_get(gv, "(ii)", &pipein, &pipeout);
 117         msgsurf(NULL, "i");
 118
 119         gchanpipe = g_io_channel_unix_new(pipein);
 120         g_io_channel_set_encoding(gchanpipe, NULL, NULL);
 121         g_io_channel_set_close_on_unref(gchanpipe, TRUE);
 122         g_io_add_watch(gchanpipe, G_IO_IN, readpipe, NULL);
 123 }