aboutsummaryrefslogtreecommitdiff
path: root/html/dialog.js
blob: a2406e8cca8086a98a6f2aef4ce1c570090c4187 (about) (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/**
 * This file is part of Haketilo.
 *
 * Function: Showing and error/info/confirmation dialog.
 *
 * Copyright (C) 2022 Wojtek Kosior
 *
 * 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.
 *
 * As additional permission under GNU GPL version 3 section 7, you
 * may distribute forms of that code without the copy of the GNU
 * GPL normally required by section 4, provided you include this
 * license notice and, in case of non-source distribution, a URL
 * through which recipients can access the Corresponding Source.
 * If you modify file(s) with this exception, you may extend this
 * exception to your version of the file(s), but you are not
 * obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 *
 * As a special exception to the GPL, any HTML file which merely
 * makes function calls to this code, and for that purpose
 * includes it by reference shall be deemed a separate work for
 * copyright law purposes. If you modify this code, you may extend
 * this exception to your version of the code, but you are not
 * obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * I, Wojtek Kosior, thereby promise not to sue for violation of this file's
 * license. Although I request that you do not make use of this code in a
 * proprietary program, I am not going to enforce this in court.
 */

#FROM html/DOM_helpers.js IMPORT clone_template

function make(on_dialog_show, on_dialog_hide)
{
    const dialog_context = clone_template("dialog");
    Object.assign(dialog_context, {
	on_dialog_show,
	on_dialog_hide,
	shown: false,
	queue: [],
    });

    for (const [id, val] of [["yes", true], ["no", false], ["ok", undefined]]) {
	const but = dialog_context[`${id}_but`];
	but.haketilo_dialog_result = val;
	but.addEventListener("click", e => close_dialog(dialog_context, e));
    }

    return dialog_context;
}
#EXPORT make

function close_dialog(dialog_context, event)
{
    if ((event && event.target.parentElement.classList.contains("hide")) ||
       dialog_context.queue.length === 0)
	return;

    const [[shown_buts_id, msg, resolve]] = dialog_context.queue.splice(0, 1);

    if (dialog_context.queue.length > 0) {
	process_queue_item(dialog_context);
    } else {
	dialog_context.shown = false;
	try {
	    dialog_context.on_dialog_hide();
	} catch(e) {
	    console.error(e);
	}
    }

    resolve(event ? event.target.haketilo_dialog_result : undefined);
}
#EXPORT  close_dialog  AS close

function process_queue_item(dialog_context)
{
    const [shown_buts_id, msg, resolve] = dialog_context.queue[0];

    [...dialog_context.msg.childNodes].forEach(n => n.remove());
    dialog_context.msg.append(...msg);
    for (const buts_id of ["ask_buts", "conf_buts"]) {
	const action = buts_id === shown_buts_id ? "remove" : "add";
	dialog_context[buts_id].classList[action]("hide");
    }
}

async function show_dialog(dialog_context, shown_buts_id, msg)
{
    let resolve;
    const result_prom = new Promise(cb => resolve = cb);
    dialog_context.queue.push([shown_buts_id, msg, resolve]);

    if (!dialog_context.shown) {
	process_queue_item(dialog_context);
	dialog_context.shown = true;
	try {
	    dialog_context.on_dialog_show();
	} catch(e) {
	    console.error(e);
	}
    }

    return await result_prom;
}

const error = (ctx, ...msg) => show_dialog(ctx, "conf_buts", msg);
#EXPORT error

/* info() and error() are the same for now, we might later change that. */
const info = error;
#EXPORT info

const ask = (ctx, ...msg) => show_dialog(ctx, "ask_buts", msg);
#EXPORT ask

const loader = (ctx, ...msg) => show_dialog(ctx, null, msg);
#EXPORT loader

/*
 * Wrapper around target.addEventListener() that makes the requested callback
 * only execute if dialog is not shown.
 */
function onevent(ctx, target, event, cb)
{
    target.addEventListener(event, e => !ctx.shown && cb(e));
}
#EXPORT onevent