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