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/* -*- Mode: JS2; indent-tabs-mode: nil; js2-basic-offset: 4 -*- */
/* vim: set et ts=4 sw=4: */
/*
* Copyright (c) 2017 Marcus Lundblad.
*
* GNOME Maps 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.
*
* GNOME Maps 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 GNOME Maps; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Marcus Lundblad <ml@update.uu.se>
*/
import Cairo from 'cairo';
import GLib from 'gi://GLib';
import GObject from 'gi://GObject';
import Graphene from 'gi://Graphene';
import Gtk from 'gi://Gtk';
import * as Color from './color.js';
import * as Gfx from './gfx.js';
import * as Utils from './utils.js';
/* threashhold for route color luminance when we consider it more or less
* as white, and draw an outline around the label
*/
const OUTLINE_LUMINANCE_THREASHHOLD = 0.9;
/* the threashhold when using a dark theme, when the color is darker draw an
* outline around the label
*/
const DARK_OUTLINE_LUMINANCE_THREASHHOLD = 0.1;
// fallback high contrast colors
const HIGH_CONTRAST_COLOR = '000000';
const HIGH_CONTRAST_TEXT_COLOR = 'ffffff';
export class TransitRouteLabel extends Gtk.Label {
constructor({leg, compact, ...params}) {
super(params);
this._setLabel(leg, compact);
}
_setLabel(leg, compact) {
let color = leg.color;
let textColor = leg.textColor;
let label = leg.route;
let usingDarkTheme = Utils.isUsingDarkThemeVariant();
let usingHighContrastTheme = Utils.isUsingHighContrastTheme();
textColor = Color.getContrastingForegroundColor(color, textColor);
/* if using the high contrast theme and a label is set, fallback to
* hight-contrasting colors, if no label, assume the route color is
* more relevant and keep it also for high contrast
*/
if (usingHighContrastTheme && ((compact && leg.compactRoute) ||
(!compact && label))) {
color = HIGH_CONTRAST_COLOR;
textColor = HIGH_CONTRAST_TEXT_COLOR;
}
this._color = color;
this._textColor = textColor;
if ((!usingDarkTheme &&
Color.relativeLuminance(color) > OUTLINE_LUMINANCE_THREASHHOLD) ||
(usingDarkTheme &&
Color.relativeLuminance(color) < DARK_OUTLINE_LUMINANCE_THREASHHOLD)) {
this._hasOutline = true;
}
/* for compact (overview) mode, try to shorten the label if the route
* name was more than 6 characters
*/
if (compact && label.length > 6)
label = leg.compactRoute;
if (compact) {
/* restrict number of characters shown in the label when compact mode
* is requested
*/
this.max_width_chars = 6;
} else if (leg && !leg.headsign) {
// if there is no trip headsign to display, allow more space
this.max_width_chars = 25;
}
this.label = '<span foreground="#%s">%s</span>'.format(
textColor,
GLib.markup_escape_text(label, -1));
this.queue_draw();
}
/* I didn't find any easy/obvious way to override widget background color
* and getting rounded corner just using CSS styles, so doing a custom
* Cairo drawing of a "roundrect"
*/
vfunc_snapshot(snapshot) {
let {x, y, width, height} = this.get_allocation();
let rect = new Graphene.Rect();
rect.init(0, 0, width, height);
let cr = snapshot.append_cairo(rect);
// clip off the badge, this seems to avoid some extra space at right/bottom with the CSS
Gfx.drawColoredBagde(cr, this._color,
this._hasOutline ? this._textColor : null,
0, 0, width - 3, height - 3);
super.vfunc_snapshot(snapshot);
}
}
GObject.registerClass({
Template: 'resource:///org/gnome/Maps/ui/transit-route-label.ui',
}, TransitRouteLabel);
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