src: Add fading label class
Co-Authored-By: Titouan Real <titouan.real@gmail.com> Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/657>
This commit is contained in:
Philipp S
committed by
Georges Basile Stavracas Neto
Georges Basile Stavracas Neto
co-authored by
Titouan Real
Titouan Real
parent
32f44b160e
commit
bd4d503080
@@ -165,6 +165,7 @@ libedataserver_dep = dependency('libedataserver-1.2', version: '>= 3.45.1')
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libecal_dep = dependency('libecal-2.0', version: '>= 3.45.1')
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libsoup_dep = dependency('libsoup-3.0')
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libadwaita_dep = dependency('libadwaita-1', version: '>= 1.8.alpha')
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fribidi_dep = dependency('fribidi')
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glib_dep = dependency('glib-2.0', version: '>= 2.80.0')
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gtk_dep = dependency('gtk4', version: '>= 4.21.2')
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gio_dep = dependency('gio-2.0', version: '>= 2.58.0')
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@@ -0,0 +1,71 @@
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/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/..
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*/
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/* Bits taken from GTK 4.0.2 and tweaked to be used by libadwaita. */
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/* Copied from libadwaita 1.8 and adapted for use in gnome-calendar. */
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#include "gcal-bidi.h"
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#include <fribidi.h>
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static PangoDirection
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gcal_unichar_direction (gunichar ch)
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{
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FriBidiCharType fribidi_ch_type;
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G_STATIC_ASSERT (sizeof (FriBidiChar) == sizeof (gunichar));
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fribidi_ch_type = fribidi_get_bidi_type (ch);
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if (!FRIBIDI_IS_STRONG (fribidi_ch_type))
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return PANGO_DIRECTION_NEUTRAL;
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else if (FRIBIDI_IS_RTL (fribidi_ch_type))
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return PANGO_DIRECTION_RTL;
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else
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return PANGO_DIRECTION_LTR;
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}
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PangoDirection
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gcal_find_base_dir (const gchar *text,
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gint length)
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{
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PangoDirection dir = PANGO_DIRECTION_NEUTRAL;
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const char *p;
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g_return_val_if_fail (text != NULL || length == 0, PANGO_DIRECTION_NEUTRAL);
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p = text;
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while ((length < 0 || p < text + length) && *p) {
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gunichar wc = g_utf8_get_char (p);
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dir = gcal_unichar_direction (wc);
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if (dir != PANGO_DIRECTION_NEUTRAL)
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break;
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p = g_utf8_next_char (p);
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}
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return dir;
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}
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@@ -0,0 +1,19 @@
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/*
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* Copyright (C) 2021 Purism SPC
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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/* Copied from libadwaita 1.8 and adapted for use in gnome-calendar. */
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#pragma once
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#include <glib.h>
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#include <pango/pango.h>
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G_BEGIN_DECLS
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PangoDirection gcal_find_base_dir (const gchar *text,
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gint length);
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G_END_DECLS
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@@ -0,0 +1,310 @@
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/*
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* Copyright (C) 2021 Purism SPC
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* Author: Alice Mikhaylenko <alice.mikhaylenko@puri.sm>
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*/
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/* Copied from libadwaita 1.8 and adapted for use in gnome-calendar. */
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#include "config.h"
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#include "gcal-fading-label.h"
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#include <glib/gi18n-lib.h>
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#include "gcal-bidi.h"
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#define FADE_WIDTH 18.0f
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struct _GcalFadingLabel
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{
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GtkWidget parent_instance;
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GtkWidget *label;
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gfloat align;
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};
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G_DEFINE_FINAL_TYPE (GcalFadingLabel, gcal_fading_label, GTK_TYPE_WIDGET)
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enum {
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PROP_0,
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PROP_LABEL,
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PROP_ALIGN,
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LAST_PROP
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};
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static GParamSpec *props[LAST_PROP];
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static gboolean
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is_rtl (GcalFadingLabel *self)
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{
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PangoDirection pango_direction = PANGO_DIRECTION_NEUTRAL;
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const gchar *label = gcal_fading_label_get_label (self);
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if (label)
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pango_direction = gcal_find_base_dir (label, -1);
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if (pango_direction == PANGO_DIRECTION_RTL)
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return TRUE;
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if (pango_direction == PANGO_DIRECTION_LTR)
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return FALSE;
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return gtk_widget_get_direction (GTK_WIDGET (self)) == GTK_TEXT_DIR_RTL;
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}
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static void
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gcal_fading_label_measure (GtkWidget *widget,
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GtkOrientation orientation,
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gint for_size,
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gint *min,
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gint *nat,
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gint *min_baseline,
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gint *nat_baseline)
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{
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GcalFadingLabel *self = GCAL_FADING_LABEL (widget);
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gtk_widget_measure (self->label,
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orientation,
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for_size,
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min, nat,
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min_baseline, nat_baseline);
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if (orientation == GTK_ORIENTATION_HORIZONTAL && min)
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*min = 0;
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}
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static void
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gcal_fading_label_size_allocate (GtkWidget *widget,
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gint width,
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gint height,
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gint baseline)
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{
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GcalFadingLabel *self = GCAL_FADING_LABEL (widget);
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GskTransform *transform;
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gfloat align = is_rtl (self) ? 1 - self->align : self->align;
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gint child_width;
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gfloat offset;
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gtk_widget_measure (self->label,
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GTK_ORIENTATION_HORIZONTAL,
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height,
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NULL,
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&child_width,
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NULL, NULL);
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offset = (width - child_width) * align;
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transform = gsk_transform_translate (NULL, &GRAPHENE_POINT_INIT (offset, 0));
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gtk_widget_allocate (self->label, child_width, height, baseline, transform);
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}
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static void
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gcal_fading_label_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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GcalFadingLabel *self = GCAL_FADING_LABEL (widget);
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g_autoptr (GskRenderNode) node = NULL;
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g_autoptr (GtkSnapshot) child_snapshot = NULL;
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graphene_rect_t bounds;
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gfloat align = is_rtl (self) ? 1 - self->align : self->align;
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gint width = gtk_widget_get_width (widget);
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gint clipped_size;
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if (width <= 0)
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return;
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clipped_size = gtk_widget_get_width (self->label) - width;
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if (clipped_size <= 0)
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{
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gtk_widget_snapshot_child (widget, self->label, snapshot);
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return;
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}
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child_snapshot = gtk_snapshot_new ();
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gtk_widget_snapshot_child (widget, self->label, child_snapshot);
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node = gtk_snapshot_free_to_node (g_steal_pointer (&child_snapshot));
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gsk_render_node_get_bounds (node, &bounds);
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bounds.origin.x = 0;
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bounds.origin.y = floor (bounds.origin.y);
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bounds.size.width = width;
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bounds.size.height = ceil (bounds.size.height) + 1;
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gtk_snapshot_push_mask (snapshot, GSK_MASK_MODE_INVERTED_ALPHA);
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if (align > 0)
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{
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gtk_snapshot_append_linear_gradient (snapshot,
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&GRAPHENE_RECT_INIT (0, bounds.origin.y,
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FADE_WIDTH, bounds.size.height),
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&GRAPHENE_POINT_INIT (0, 0),
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&GRAPHENE_POINT_INIT (FADE_WIDTH, 0),
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(GskColorStop[2]) {
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{ 0, { 0, 0, 0, 1 } },
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{ 1, { 0, 0, 0, 0 } },
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},
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2);
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}
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if (align < 1)
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{
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gtk_snapshot_append_linear_gradient (snapshot,
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&GRAPHENE_RECT_INIT (width - FADE_WIDTH, bounds.origin.y,
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FADE_WIDTH, bounds.size.height),
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&GRAPHENE_POINT_INIT (width, 0),
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&GRAPHENE_POINT_INIT (width - FADE_WIDTH, 0),
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(GskColorStop[2]) {
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{ 0, { 0, 0, 0, 1 } },
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{ 1, { 0, 0, 0, 0 } },
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},
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2);
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}
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gtk_snapshot_pop (snapshot);
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gtk_snapshot_push_clip (snapshot, &bounds);
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gtk_snapshot_append_node (snapshot, node);
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gtk_snapshot_pop (snapshot);
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gtk_snapshot_pop (snapshot);
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}
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static void
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gcal_fading_label_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GcalFadingLabel *self = GCAL_FADING_LABEL (object);
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switch (prop_id) {
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case PROP_LABEL:
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g_value_set_string (value, gcal_fading_label_get_label (self));
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break;
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case PROP_ALIGN:
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g_value_set_float (value, gcal_fading_label_get_align (self));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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gcal_fading_label_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GcalFadingLabel *self = GCAL_FADING_LABEL (object);
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switch (prop_id) {
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case PROP_LABEL:
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gcal_fading_label_set_label (self, g_value_get_string (value));
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break;
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case PROP_ALIGN:
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gcal_fading_label_set_align (self, g_value_get_float (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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gcal_fading_label_dispose (GObject *object)
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{
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GcalFadingLabel *self = GCAL_FADING_LABEL (object);
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g_clear_pointer (&self->label, gtk_widget_unparent);
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G_OBJECT_CLASS (gcal_fading_label_parent_class)->dispose (object);
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}
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static void
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gcal_fading_label_class_init (GcalFadingLabelClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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object_class->get_property = gcal_fading_label_get_property;
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object_class->set_property = gcal_fading_label_set_property;
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object_class->dispose = gcal_fading_label_dispose;
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widget_class->measure = gcal_fading_label_measure;
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widget_class->size_allocate = gcal_fading_label_size_allocate;
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widget_class->snapshot = gcal_fading_label_snapshot;
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props[PROP_LABEL] =
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g_param_spec_string ("label", NULL, NULL,
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NULL,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
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props[PROP_ALIGN] =
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g_param_spec_float ("align", NULL, NULL,
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0.0, 1.0, 0.0,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (object_class, LAST_PROP, props);
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}
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static void
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gcal_fading_label_init (GcalFadingLabel *self)
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{
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self->label = gtk_label_new (NULL);
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gtk_label_set_single_line_mode (GTK_LABEL (self->label), TRUE);
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gtk_widget_set_parent (self->label, GTK_WIDGET (self));
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}
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const gchar *
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gcal_fading_label_get_label (GcalFadingLabel *self)
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{
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g_return_val_if_fail (GCAL_IS_FADING_LABEL (self), NULL);
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return gtk_label_get_label (GTK_LABEL (self->label));
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}
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void
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gcal_fading_label_set_label (GcalFadingLabel *self,
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const gchar *label)
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{
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g_return_if_fail (GCAL_IS_FADING_LABEL (self));
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if (!g_strcmp0 (label, gcal_fading_label_get_label (self)))
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return;
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gtk_label_set_label (GTK_LABEL (self->label), label);
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g_object_notify_by_pspec (G_OBJECT (self), props[PROP_LABEL]);
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}
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float
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gcal_fading_label_get_align (GcalFadingLabel *self)
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{
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g_return_val_if_fail (GCAL_IS_FADING_LABEL (self), 0.0f);
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return self->align;
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}
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void
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gcal_fading_label_set_align (GcalFadingLabel *self,
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gfloat align)
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{
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g_return_if_fail (GCAL_IS_FADING_LABEL (self));
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align = CLAMP (align, 0.0, 1.0);
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if (G_APPROX_VALUE (self->align, align, FLT_EPSILON))
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return;
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self->align = align;
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gtk_widget_queue_allocate (GTK_WIDGET (self));
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g_object_notify_by_pspec (G_OBJECT (self), props[PROP_ALIGN]);
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}
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@@ -0,0 +1,28 @@
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/*
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* Copyright (C) 2021 Purism SPC
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* Author: Alice Mikhaylenko <alice.mikhaylenko@puri.sm>
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*/
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/* Copied from libadwaita 1.8 and adapted for use in gnome-calendar. */
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#pragma once
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#include <gtk/gtk.h>
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G_BEGIN_DECLS
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#define GCAL_TYPE_FADING_LABEL (gcal_fading_label_get_type())
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G_DECLARE_FINAL_TYPE (GcalFadingLabel, gcal_fading_label, GCAL, FADING_LABEL, GtkWidget)
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const gchar *gcal_fading_label_get_label (GcalFadingLabel *self);
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void gcal_fading_label_set_label (GcalFadingLabel *self,
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const gchar *label);
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gfloat gcal_fading_label_get_align (GcalFadingLabel *self);
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void gcal_fading_label_set_align (GcalFadingLabel *self,
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gfloat align);
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G_END_DECLS
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@@ -41,11 +41,13 @@ built_sources += gnome.compile_resources(
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sources += files(
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'gcal-application.c',
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'gcal-bidi.c',
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'gcal-calendar-list.c',
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'gcal-calendar-navigation-button.c',
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'gcal-drop-overlay.c',
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'gcal-event-popover.c',
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'gcal-event-widget.c',
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'gcal-fading-label.c',
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'gcal-meeting-row.c',
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'gcal-overflow-bin.c',
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'gcal-overflow-bin-layout.c',
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@@ -8,6 +8,7 @@ gcal_deps = [
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libecal_dep,
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libsoup_dep,
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libical_dep,
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fribidi_dep,
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glib_dep,
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gtk_dep,
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gio_dep,
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Reference in New Issue
Block a user