pidgin/pidgin

Fix the infinite resizing freeze
release-2.x.y
2022-04-15, Belgin Știrbu
0079467afee4
Fix the infinite resizing freeze

This appears related to libpango somehow, as in Debian
Bullseye, libpango splits URLs with dashes at the end,
but in Debian Bookworm, the URLs are not split with dashes
at the end, and the bug does not appear to be triggered
in Bookworm.

This patch makes the assumption that the gtkimhtml widgets
stored in a PidginConversation normally resize in an
alternating manner. However, when the bug is triggered,
only the "entry" gtkimhtml member of PidginConversation
resizes, so we allow "entry" to resize only up to 3 times
in a row.

Testing Done:
Compiled and tested on several desktop environments on a few
GNU/Linux distros by pasting the link mentioned
here https://issues.imfreedom.org/issue/PIDGIN-17413 moving
the cursor at the beginning of the buffer, and holding
the spacebar pressed.

Bugs closed: PIDGIN-16753, PIDGIN-16999, PIDGIN-17287, PIDGIN-17413, PIDGIN-17430, PIDGIN-17568, PIDGIN-17602

Reviewed at https://reviews.imfreedom.org/r/1342/
/*
* @file gtkscrollbook.c GTK+ Scrolling notebook widget
* @ingroup pidgin
*/
/* pidgin
*
* Pidgin is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include "gtkscrollbook.h"
static void pidgin_scroll_book_init (PidginScrollBook *scroll_book);
static void pidgin_scroll_book_class_init (PidginScrollBookClass *klass);
static void pidgin_scroll_book_forall (GtkContainer *c,
gboolean include_internals,
GtkCallback callback,
gpointer user_data);
GType
pidgin_scroll_book_get_type (void)
{
static GType scroll_book_type = 0;
if (!scroll_book_type)
{
static const GTypeInfo scroll_book_info =
{
sizeof (PidginScrollBookClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) pidgin_scroll_book_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (PidginScrollBook),
0,
(GInstanceInitFunc) pidgin_scroll_book_init,
NULL /* value_table */
};
scroll_book_type = g_type_register_static(GTK_TYPE_VBOX,
"PidginScrollBook",
&scroll_book_info,
0);
}
return scroll_book_type;
}
static gboolean
scroll_left_cb(PidginScrollBook *scroll_book, GdkEventButton *event)
{
int index;
if (event->type != GDK_BUTTON_PRESS)
return FALSE;
index = gtk_notebook_get_current_page(GTK_NOTEBOOK(scroll_book->notebook));
if (index > 0)
gtk_notebook_set_current_page(GTK_NOTEBOOK(scroll_book->notebook), index - 1);
return TRUE;
}
static gboolean
scroll_right_cb(PidginScrollBook *scroll_book, GdkEventButton *event)
{
int index, count;
if (event->type != GDK_BUTTON_PRESS)
return FALSE;
index = gtk_notebook_get_current_page(GTK_NOTEBOOK(scroll_book->notebook));
count = gtk_notebook_get_n_pages(GTK_NOTEBOOK(scroll_book->notebook));
if (index + 1 < count)
gtk_notebook_set_current_page(GTK_NOTEBOOK(scroll_book->notebook), index + 1);
return TRUE;
}
static void
refresh_scroll_box(PidginScrollBook *scroll_book, int index, int count)
{
char *label;
gtk_widget_show_all(GTK_WIDGET(scroll_book));
if (count < 1)
gtk_widget_hide_all(scroll_book->hbox);
else {
gtk_widget_show_all(scroll_book->hbox);
if (count == 1) {
gtk_widget_hide(scroll_book->label);
gtk_widget_hide(scroll_book->left_arrow);
gtk_widget_hide(scroll_book->right_arrow);
}
}
label = g_strdup_printf("<span size='smaller' weight='bold'>(%d/%d)</span>", index+1, count);
gtk_label_set_markup(GTK_LABEL(scroll_book->label), label);
g_free(label);
if (index == 0)
gtk_widget_set_sensitive(scroll_book->left_arrow, FALSE);
else
gtk_widget_set_sensitive(scroll_book->left_arrow, TRUE);
if (index + 1 == count)
gtk_widget_set_sensitive(scroll_book->right_arrow, FALSE);
else
gtk_widget_set_sensitive(scroll_book->right_arrow, TRUE);
}
static void
page_count_change_cb(PidginScrollBook *scroll_book)
{
int count;
int index = gtk_notebook_get_current_page(GTK_NOTEBOOK(scroll_book->notebook));
count = gtk_notebook_get_n_pages(GTK_NOTEBOOK(scroll_book->notebook));
refresh_scroll_box(scroll_book, index, count);
}
static gboolean
scroll_close_cb(PidginScrollBook *scroll_book, GdkEventButton *event)
{
if (event->type == GDK_BUTTON_PRESS)
gtk_widget_destroy(gtk_notebook_get_nth_page(GTK_NOTEBOOK(scroll_book->notebook), gtk_notebook_get_current_page(GTK_NOTEBOOK(scroll_book->notebook))));
return FALSE;
}
static void
switch_page_cb(GtkNotebook *notebook, GtkNotebookPage *page, guint page_num, PidginScrollBook *scroll_book)
{
int count;
count = gtk_notebook_get_n_pages(GTK_NOTEBOOK(scroll_book->notebook));
refresh_scroll_box(scroll_book, page_num, count);
}
static void
pidgin_scroll_book_add(GtkContainer *container, GtkWidget *widget)
{
PidginScrollBook *scroll_book;
g_return_if_fail(GTK_IS_WIDGET (widget));
g_return_if_fail (widget->parent == NULL);
scroll_book = PIDGIN_SCROLL_BOOK(container);
scroll_book->children = g_list_append(scroll_book->children, widget);
gtk_widget_show(widget);
gtk_notebook_append_page(GTK_NOTEBOOK(scroll_book->notebook), widget, NULL);
page_count_change_cb(PIDGIN_SCROLL_BOOK(container));
}
static void
pidgin_scroll_book_remove(GtkContainer *container, GtkWidget *widget)
{
int page;
PidginScrollBook *scroll_book;
g_return_if_fail(GTK_IS_WIDGET(widget));
scroll_book = PIDGIN_SCROLL_BOOK(container);
scroll_book->children = g_list_remove(scroll_book->children, widget);
/* gtk_widget_unparent(widget); */
page = gtk_notebook_page_num(GTK_NOTEBOOK(PIDGIN_SCROLL_BOOK(container)->notebook), widget);
if (page >= 0) {
gtk_notebook_remove_page(GTK_NOTEBOOK(PIDGIN_SCROLL_BOOK(container)->notebook), page);
}
}
static void
pidgin_scroll_book_forall(GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
#if 0
GList *children;
#endif
PidginScrollBook *scroll_book;
g_return_if_fail(GTK_IS_CONTAINER(container));
scroll_book = PIDGIN_SCROLL_BOOK(container);
if (include_internals) {
(*callback)(scroll_book->hbox, callback_data);
(*callback)(scroll_book->notebook, callback_data);
}
#if 0
children = scroll_book->children;
while (children) {
GtkWidget *child;
child = children->data;
children = children->next;
(*callback)(child, callback_data);
}
#endif
}
static void
pidgin_scroll_book_class_init (PidginScrollBookClass *klass)
{
GtkContainerClass *container_class = (GtkContainerClass*)klass;
container_class->add = pidgin_scroll_book_add;
container_class->remove = pidgin_scroll_book_remove;
container_class->forall = pidgin_scroll_book_forall;
}
static gboolean
close_button_left_cb(GtkWidget *widget, GdkEventCrossing *event, GtkLabel *label)
{
static GdkCursor *ptr = NULL;
if (ptr == NULL) {
ptr = gdk_cursor_new(GDK_LEFT_PTR);
}
gtk_label_set_markup(label, "×");
gdk_window_set_cursor(event->window, ptr);
return FALSE;
}
static gboolean
close_button_entered_cb(GtkWidget *widget, GdkEventCrossing *event, GtkLabel *label)
{
static GdkCursor *hand = NULL;
if (hand == NULL) {
hand = gdk_cursor_new(GDK_HAND2);
}
gtk_label_set_markup(label, "<u>×</u>");
gdk_window_set_cursor(event->window, hand);
return FALSE;
}
static void
pidgin_scroll_book_init (PidginScrollBook *scroll_book)
{
GtkWidget *eb;
GtkWidget *close_button;
scroll_book->hbox = gtk_hbox_new(FALSE, 0);
/* Close */
eb = gtk_event_box_new();
gtk_box_pack_end(GTK_BOX(scroll_book->hbox), eb, FALSE, FALSE, 0);
gtk_event_box_set_visible_window(GTK_EVENT_BOX(eb), FALSE);
gtk_widget_set_events(eb, GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK);
close_button = gtk_label_new("×");
g_signal_connect(G_OBJECT(eb), "enter-notify-event", G_CALLBACK(close_button_entered_cb), close_button);
g_signal_connect(G_OBJECT(eb), "leave-notify-event", G_CALLBACK(close_button_left_cb), close_button);
gtk_container_add(GTK_CONTAINER(eb), close_button);
g_signal_connect_swapped(G_OBJECT(eb), "button-press-event", G_CALLBACK(scroll_close_cb), scroll_book);
/* Right arrow */
eb = gtk_event_box_new();
gtk_box_pack_end(GTK_BOX(scroll_book->hbox), eb, FALSE, FALSE, 0);
scroll_book->right_arrow = gtk_arrow_new(GTK_ARROW_RIGHT, GTK_SHADOW_NONE);
gtk_container_add(GTK_CONTAINER(eb), scroll_book->right_arrow);
g_signal_connect_swapped(G_OBJECT(eb), "button-press-event", G_CALLBACK(scroll_right_cb), scroll_book);
/* Count */
scroll_book->label = gtk_label_new(NULL);
gtk_box_pack_end(GTK_BOX(scroll_book->hbox), scroll_book->label, FALSE, FALSE, 0);
/* Left arrow */
eb = gtk_event_box_new();
gtk_box_pack_end(GTK_BOX(scroll_book->hbox), eb, FALSE, FALSE, 0);
scroll_book->left_arrow = gtk_arrow_new(GTK_ARROW_LEFT, GTK_SHADOW_NONE);
gtk_container_add(GTK_CONTAINER(eb), scroll_book->left_arrow);
g_signal_connect_swapped(G_OBJECT(eb), "button-press-event", G_CALLBACK(scroll_left_cb), scroll_book);
gtk_box_pack_start(GTK_BOX(scroll_book), scroll_book->hbox, FALSE, FALSE, 0);
scroll_book->notebook = gtk_notebook_new();
gtk_notebook_set_show_tabs(GTK_NOTEBOOK(scroll_book->notebook), FALSE);
gtk_notebook_set_show_border(GTK_NOTEBOOK(scroll_book->notebook), FALSE);
gtk_box_pack_start(GTK_BOX(scroll_book), scroll_book->notebook, TRUE, TRUE, 0);
g_signal_connect_swapped(G_OBJECT(scroll_book->notebook), "remove", G_CALLBACK(page_count_change_cb), scroll_book);
g_signal_connect(G_OBJECT(scroll_book->notebook), "switch-page", G_CALLBACK(switch_page_cb), scroll_book);
gtk_widget_show_all(scroll_book->notebook);
}
GtkWidget *
pidgin_scroll_book_new()
{
return g_object_new(PIDGIN_TYPE_SCROLL_BOOK, NULL);
}