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/*
* widgets/webview/scroll.c - webkit webview scroll functions
*
* Copyright © 2010-2011 Mason Larobina <mason.larobina@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
static gint
luaH_webview_scroll_newindex(lua_State *L)
{
/* get webview widget upvalue */
webview_data_t *d = luaH_checkwvdata(L, lua_upvalueindex(1));
const gchar *prop = luaL_checkstring(L, 2);
luakit_token_t t = l_tokenize(prop);
GtkAdjustment *a;
if (t == L_TK_X) a = gtk_scrolled_window_get_hadjustment(d->win);
else if (t == L_TK_Y) a = gtk_scrolled_window_get_vadjustment(d->win);
else return 0;
gdouble value = luaL_checknumber(L, 3);
gdouble max = gtk_adjustment_get_upper(a) -
gtk_adjustment_get_page_size(a);
gtk_adjustment_set_value(a, ((value < 0 ? 0 : value) > max ? max : value));
return 0;
}
static gint
luaH_webview_scroll_index(lua_State *L)
{
webview_data_t *d = luaH_checkwvdata(L, lua_upvalueindex(1));
const gchar *prop = luaL_checkstring(L, 2);
luakit_token_t t = l_tokenize(prop);
GtkAdjustment *a = (*prop == 'x') ?
gtk_scrolled_window_get_hadjustment(d->win)
: gtk_scrolled_window_get_vadjustment(d->win);
if (t == L_TK_X || t == L_TK_Y) {
lua_pushnumber(L, gtk_adjustment_get_value(a));
return 1;
} else if (t == L_TK_XMAX || t == L_TK_YMAX) {
lua_pushnumber(L, gtk_adjustment_get_upper(a) -
gtk_adjustment_get_page_size(a));
return 1;
} else if (t == L_TK_XPAGE_SIZE || t == L_TK_YPAGE_SIZE) {
lua_pushnumber(L, gtk_adjustment_get_page_size(a));
return 1;
}
return 0;
}
static gint
luaH_webview_push_scroll_table(lua_State *L)
{
/* create scroll table */
lua_newtable(L);
/* setup metatable */
lua_createtable(L, 0, 2);
/* push __index metafunction */
lua_pushliteral(L, "__index");
lua_pushvalue(L, 1); /* copy webview userdata */
lua_pushcclosure(L, luaH_webview_scroll_index, 1);
lua_rawset(L, -3);
/* push __newindex metafunction */
lua_pushliteral(L, "__newindex");
lua_pushvalue(L, 1); /* copy webview userdata */
lua_pushcclosure(L, luaH_webview_scroll_newindex, 1);
lua_rawset(L, -3);
lua_setmetatable(L, -2);
return 1;
}
void
show_scrollbars(webview_data_t *d, gboolean show)
{
GObject *frame = G_OBJECT(webkit_web_view_get_main_frame(d->view));
/* show scrollbars */
if (show) {
if (d->hide_id)
g_signal_handler_disconnect(frame, d->hide_id);
gtk_scrolled_window_set_policy(d->win,
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
d->hide_id = 0;
/* hide scrollbars */
} else if (!d->hide_id) {
gtk_scrolled_window_set_policy(d->win,
GTK_POLICY_NEVER, GTK_POLICY_NEVER);
d->hide_id = g_signal_connect(frame, "scrollbars-policy-changed",
G_CALLBACK(true_cb), NULL);
}
}
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