133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/* ide-frame-wrapper.c
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*
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* Copyright 2018-2019 Christian Hergert <chergert@redhat.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#define G_LOG_DOMAIN "ide-frame-wrapper"
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#include "config.h"
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#include "ide-frame-wrapper.h"
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/*
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* This is just a GtkStack wrapper that allows us to override
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* GtkContainer::remove() so that we can transition to the previously
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* focused child first.
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*/
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struct _IdeFrameWrapper
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{
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GtkStack parent_instance;
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GQueue history;
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};
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G_DEFINE_FINAL_TYPE (IdeFrameWrapper, ide_frame_wrapper, GTK_TYPE_STACK)
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static void
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ide_frame_wrapper_add (GtkContainer *container,
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GtkWidget *widget)
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{
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IdeFrameWrapper *self = (IdeFrameWrapper *)container;
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g_assert (IDE_IS_FRAME_WRAPPER (container));
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g_assert (GTK_IS_WIDGET (widget));
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g_object_freeze_notify (G_OBJECT (self));
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if (gtk_widget_get_visible (widget))
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g_queue_push_head (&self->history, widget);
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else
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g_queue_push_tail (&self->history, widget);
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GTK_CONTAINER_CLASS (ide_frame_wrapper_parent_class)->add (container, widget);
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g_object_thaw_notify (G_OBJECT (self));
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}
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static void
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ide_frame_wrapper_remove (GtkContainer *container,
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GtkWidget *widget)
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{
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IdeFrameWrapper *self = (IdeFrameWrapper *)container;
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g_assert (IDE_IS_FRAME_WRAPPER (container));
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g_assert (GTK_IS_WIDGET (widget));
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/* Remove the widget from our history chain, and then see if we need to
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* first change the visible child before removing. If we don't we risk,
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* focusing the wrong "next" widget as part of the removal.
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*/
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g_object_freeze_notify (G_OBJECT (self));
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g_queue_remove (&self->history, widget);
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if (self->history.length > 0)
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{
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GtkWidget *new_fg = g_queue_peek_head (&self->history);
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if (new_fg != gtk_stack_get_visible_child (GTK_STACK (self)))
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gtk_stack_set_visible_child (GTK_STACK (self), new_fg);
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}
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GTK_CONTAINER_CLASS (ide_frame_wrapper_parent_class)->remove (container, widget);
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g_object_thaw_notify (G_OBJECT (self));
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}
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static void
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ide_frame_wrapper_notify_visible_child (IdeFrameWrapper *self,
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GParamSpec *pspec)
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{
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GtkWidget *visible_child;
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g_assert (IDE_IS_FRAME_WRAPPER (self));
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g_assert (pspec != NULL);
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if ((visible_child = gtk_stack_get_visible_child (GTK_STACK (self))))
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{
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if (visible_child != g_queue_peek_head (&self->history))
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{
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GList *link_ = g_queue_find (&self->history, visible_child);
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g_assert (link_ != NULL);
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g_queue_unlink (&self->history, link_);
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g_queue_push_head_link (&self->history, link_);
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}
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}
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}
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static void
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ide_frame_wrapper_class_init (IdeFrameWrapperClass *klass)
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{
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GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
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container_class->add = ide_frame_wrapper_add;
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container_class->remove = ide_frame_wrapper_remove;
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}
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static void
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ide_frame_wrapper_init (IdeFrameWrapper *self)
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{
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g_signal_connect (self,
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"notify::visible-child",
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G_CALLBACK (ide_frame_wrapper_notify_visible_child),
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NULL);
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}
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