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- #include <sys/stat.h>
- #include <fcntl.h>
- #include <limits.h>
- #include <stdlib.h>
- #include <gio/gio.h>
- #include <webkit2/webkit-web-extension.h>
- #include <webkitdom/webkitdom.h>
- #include <webkitdom/WebKitDOMDOMWindowUnstable.h>
- #include "common.h"
- #define LENGTH(x) (sizeof(x) / sizeof(x[0]))
- typedef struct Page {
- guint64 id;
- WebKitWebPage *webpage;
- struct Page *next;
- } Page;
- static int pipein, pipeout;
- static Page *pages;
- Page *
- newpage(WebKitWebPage *page)
- {
- Page *p;
- if (!(p = calloc(1, sizeof(Page))))
- die("Cannot malloc!\n");
- p->next = pages;
- pages = p;
- p->id = webkit_web_page_get_id(page);
- p->webpage = page;
- return p;
- }
- static void
- msgsurf(Page *p, const char *s)
- {
- static char msg[MSGBUFSZ];
- size_t sln = strlen(s);
- int ret;
- if ((ret = snprintf(msg, sizeof(msg), "%c%c%s",
- 2 + sln, p ? p->id : 0, s))
- >= sizeof(msg)) {
- fprintf(stderr, "webext: message too long: %d\n", ret);
- return;
- }
- if (pipeout && write(pipeout, msg, sizeof(msg)) < 0)
- fprintf(stderr, "webext: error sending: %.*s\n", ret-2, msg+2);
- }
- static gboolean
- readpipe(GIOChannel *s, GIOCondition c, gpointer unused)
- {
- static char msg[MSGBUFSZ], msgsz;
- WebKitDOMDOMWindow *view;
- GError *gerr = NULL;
- glong wh, ww;
- Page *p;
- if (g_io_channel_read_chars(s, msg, LENGTH(msg), NULL, &gerr) !=
- G_IO_STATUS_NORMAL) {
- fprintf(stderr, "webext: error reading pipe: %s\n",
- gerr->message);
- g_error_free(gerr);
- return TRUE;
- }
- if ((msgsz = msg[0]) < 3) {
- fprintf(stderr, "webext: message too short: %d\n", msgsz);
- return TRUE;
- }
- for (p = pages; p; p = p->next) {
- if (p->id == msg[1])
- break;
- }
- if (!p || !(view = webkit_dom_document_get_default_view(
- webkit_web_page_get_dom_document(p->webpage))))
- return TRUE;
- switch (msg[2]) {
- case 'h':
- if (msgsz != 4)
- return TRUE;
- ww = webkit_dom_dom_window_get_inner_width(view);
- webkit_dom_dom_window_scroll_by(view,
- (ww / 100) * msg[3], 0);
- break;
- case 'v':
- if (msgsz != 4)
- return TRUE;
- wh = webkit_dom_dom_window_get_inner_height(view);
- webkit_dom_dom_window_scroll_by(view,
- 0, (wh / 100) * msg[3]);
- break;
- }
- return TRUE;
- }
- static void
- webpagecreated(WebKitWebExtension *e, WebKitWebPage *wp, gpointer unused)
- {
- Page *p = newpage(wp);
- }
- G_MODULE_EXPORT void
- webkit_web_extension_initialize_with_user_data(WebKitWebExtension *e, GVariant *gv)
- {
- GIOChannel *gchanpipe;
- g_signal_connect(e, "page-created", G_CALLBACK(webpagecreated), NULL);
- g_variant_get(gv, "(ii)", &pipein, &pipeout);
- msgsurf(NULL, "i");
- gchanpipe = g_io_channel_unix_new(pipein);
- g_io_channel_set_encoding(gchanpipe, NULL, NULL);
- g_io_channel_set_close_on_unref(gchanpipe, TRUE);
- g_io_add_watch(gchanpipe, G_IO_IN, readpipe, NULL);
- }
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