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gem-graph-client/libide/sourceview/ide-completion-overlay.c

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/* ide-completion-overlay.c
*
* Copyright 2018-2019 Christian Hergert <chergert@redhat.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/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#define G_LOG_DOMAIN "ide-completion-overlay"
#include "config.h"
#include "ide-completion-display.h"
#include "ide-completion-overlay.h"
#include "ide-completion-private.h"
#include "ide-completion-proposal.h"
#include "ide-completion-provider.h"
#include "ide-completion-view.h"
struct _IdeCompletionOverlay
{
DzlBin parent_instance;
IdeCompletionView *view;
};
enum {
PROP_0,
PROP_CONTEXT,
N_PROPS
};
static void completion_display_iface_init (IdeCompletionDisplayInterface *);
G_DEFINE_FINAL_TYPE_WITH_CODE (IdeCompletionOverlay, ide_completion_overlay, GTK_TYPE_BIN,
G_IMPLEMENT_INTERFACE (IDE_TYPE_COMPLETION_DISPLAY,
completion_display_iface_init))
static GParamSpec *properties [N_PROPS];
static void
ide_completion_overlay_show (GtkWidget *widget)
{
gtk_widget_set_opacity (widget, 1.0);
GTK_WIDGET_CLASS (ide_completion_overlay_parent_class)->show (widget);
}
static void
ide_completion_overlay_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
IdeCompletionOverlay *self = IDE_COMPLETION_OVERLAY (object);
switch (prop_id)
{
case PROP_CONTEXT:
g_value_set_object (value, ide_completion_view_get_context (self->view));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
ide_completion_overlay_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
IdeCompletionOverlay *self = IDE_COMPLETION_OVERLAY (object);
switch (prop_id)
{
case PROP_CONTEXT:
ide_completion_view_set_context (self->view, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
ide_completion_overlay_class_init (IdeCompletionOverlayClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->get_property = ide_completion_overlay_get_property;
object_class->set_property = ide_completion_overlay_set_property;
widget_class->show = ide_completion_overlay_show;
properties [PROP_CONTEXT] =
g_param_spec_object ("context",
"Context",
"The context to be displayed",
IDE_TYPE_COMPLETION_CONTEXT,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, N_PROPS, properties);
gtk_widget_class_set_css_name (widget_class, "completionoverlay");
gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/libide-sourceview/ui/ide-completion-overlay.ui");
gtk_widget_class_bind_template_child (widget_class, IdeCompletionOverlay, view);
g_type_ensure (IDE_TYPE_COMPLETION_VIEW);
}
static void
ide_completion_overlay_init (IdeCompletionOverlay *self)
{
gtk_widget_init_template (GTK_WIDGET (self));
gtk_widget_set_can_focus (GTK_WIDGET (self), FALSE);
g_signal_connect_swapped (self->view,
"reposition",
G_CALLBACK (gtk_widget_queue_resize),
self);
}
IdeCompletionOverlay *
_ide_completion_overlay_new (void)
{
return g_object_new (IDE_TYPE_COMPLETION_OVERLAY, NULL);
}
static gboolean
ide_completion_overlay_get_child_position_cb (IdeCompletionOverlay *self,
GtkWidget *widget,
GdkRectangle *out_rect,
GtkOverlay *overlay)
{
IdeCompletionContext *context;
GtkStyleContext *style_context;
GdkRectangle begin_rect, end_rect, rect;
GtkTextIter begin, end;
GtkBorder border;
GtkAllocation alloc;
GtkStateFlags flags;
GtkRequisition min, nat;
GtkTextView *view;
gint x_offset = 0;
g_return_val_if_fail (IDE_IS_COMPLETION_OVERLAY (self), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (GTK_IS_OVERLAY (overlay), FALSE);
g_return_val_if_fail (out_rect != NULL, FALSE);
if (widget != GTK_WIDGET (self))
return FALSE;
if (!(context = ide_completion_view_get_context (self->view)))
return FALSE;
gtk_widget_get_allocation (GTK_WIDGET (overlay), &alloc);
view = ide_completion_context_get_view (context);
gtk_widget_get_preferred_size (widget, &min, &nat);
ide_completion_context_get_bounds (context, &begin, &end);
gtk_text_view_get_iter_location (view, &begin, &begin_rect);
gtk_text_view_get_iter_location (view, &end, &end_rect);
gtk_text_view_buffer_to_window_coords (view,
GTK_TEXT_WINDOW_WIDGET,
begin_rect.x, begin_rect.y,
&begin_rect.x, &begin_rect.y);
gtk_text_view_buffer_to_window_coords (view,
GTK_TEXT_WINDOW_WIDGET,
end_rect.x, end_rect.y,
&end_rect.x, &end_rect.y);
gdk_rectangle_union (&begin_rect, &end_rect, &rect);
gtk_widget_translate_coordinates (GTK_WIDGET (view), GTK_WIDGET (overlay),
rect.x, rect.y,
&rect.x, &rect.y);
style_context = gtk_widget_get_style_context (GTK_WIDGET (self->view));
flags = gtk_style_context_get_state (style_context);
gtk_style_context_get_margin (style_context, flags, &border);
x_offset = _ide_completion_view_get_x_offset (self->view);
/* TODO: Figure out where 11 is coming from */
#define EXTRA_SHIFT 11
x_offset -= EXTRA_SHIFT;
out_rect->x = rect.x - x_offset - border.left;
out_rect->y = rect.y + rect.height;
out_rect->height = nat.height;
out_rect->width = nat.width;
/*
* If we can keep the position in place by using the minimum size (or
* larger up to the overlay bounds), then prefer to do that before shifting.
*/
if (out_rect->x + out_rect->width > alloc.width)
{
if (out_rect->x + min.width <= alloc.width)
out_rect->width = alloc.width - out_rect->x;
else
out_rect->width = alloc.width - min.width;
}
if (out_rect->x < 0)
{
out_rect->x = 0;
if (out_rect->width > alloc.width)
out_rect->width = alloc.width;
}
if (out_rect->y + out_rect->height > alloc.height)
out_rect->y = rect.y - out_rect->height;
#if 0
g_print ("Position: %d,%d %dx%d\n",
out_rect->x,
out_rect->y,
out_rect->width,
out_rect->height);
#endif
return TRUE;
}
static void
ide_completion_overlay_attach (IdeCompletionDisplay *display,
GtkSourceView *view)
{
IdeCompletionOverlay *self = (IdeCompletionOverlay *)display;
GtkOverlay *overlay = NULL;
GtkWidget *widget = (GtkWidget *)view;
g_assert (IDE_IS_COMPLETION_OVERLAY (self));
g_assert (IDE_IS_SOURCE_VIEW (view));
while ((widget = gtk_widget_get_ancestor (widget, GTK_TYPE_OVERLAY)))
{
overlay = GTK_OVERLAY (widget);
widget = gtk_widget_get_parent (widget);
}
if (overlay == NULL)
{
g_critical ("IdeCompletion requires a GtkOverlay to attach the completion "
"window due to resize restrictions in windowing systems");
return;
}
gtk_overlay_add_overlay (overlay, GTK_WIDGET (self));
g_signal_connect_object (overlay,
"get-child-position",
G_CALLBACK (ide_completion_overlay_get_child_position_cb),
self,
G_CONNECT_SWAPPED);
}
static void
ide_completion_overlay_set_n_rows (IdeCompletionDisplay *display,
guint n_rows)
{
g_assert (IDE_IS_COMPLETION_OVERLAY (display));
g_assert (n_rows > 0);
g_assert (n_rows <= 32);
_ide_completion_view_set_n_rows (IDE_COMPLETION_OVERLAY (display)->view, n_rows);
}
static gboolean
ide_completion_overlay_key_press_event (IdeCompletionDisplay *display,
const GdkEventKey *event)
{
IdeCompletionOverlay *self = (IdeCompletionOverlay *)display;
g_assert (IDE_IS_COMPLETION_OVERLAY (self));
g_assert (event != NULL);
return _ide_completion_view_handle_key_press (self->view, event);
}
static void
ide_completion_overlay_set_context (IdeCompletionDisplay *display,
IdeCompletionContext *context)
{
IdeCompletionOverlay *self = (IdeCompletionOverlay *)display;
g_return_if_fail (IDE_IS_COMPLETION_OVERLAY (self));
g_return_if_fail (!context || IDE_IS_COMPLETION_CONTEXT (context));
ide_completion_view_set_context (self->view, context);
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_CONTEXT]);
}
static void
ide_completion_overlay_move_cursor (IdeCompletionDisplay *display,
GtkMovementStep step,
gint count)
{
g_assert (IDE_IS_COMPLETION_OVERLAY (display));
_ide_completion_view_move_cursor (IDE_COMPLETION_OVERLAY (display)->view, step, count);
}
static void
ide_completion_overlay_set_font_desc (IdeCompletionDisplay *display,
const PangoFontDescription *font_desc)
{
g_assert (IDE_IS_COMPLETION_OVERLAY (display));
_ide_completion_view_set_font_desc (IDE_COMPLETION_OVERLAY (display)->view, font_desc);
}
static void
completion_display_iface_init (IdeCompletionDisplayInterface *iface)
{
iface->set_context = ide_completion_overlay_set_context;
iface->attach = ide_completion_overlay_attach;
iface->key_press_event = ide_completion_overlay_key_press_event;
iface->set_n_rows = ide_completion_overlay_set_n_rows;
iface->move_cursor = ide_completion_overlay_move_cursor;
iface->set_font_desc = ide_completion_overlay_set_font_desc;
}
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