aboutsummaryrefslogtreecommitdiff
path: root/ext/bg/js/settings/popup-preview-frame.js
blob: 28c95efbd170968c599518827982bc5d970f1005 (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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
/*
 * Copyright (C) 2019-2020  Yomichan Authors
 *
 * 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 <https://www.gnu.org/licenses/>.
 */

/* global
 * Frontend
 * Popup
 * PopupFactory
 * TextSourceRange
 * api
 */

class PopupPreviewFrame {
    constructor() {
        this._frontend = null;
        this._frontendGetOptionsContextOld = null;
        this._apiOptionsGetOld = null;
        this._popup = null;
        this._popupSetCustomOuterCssOld = null;
        this._popupShown = false;
        this._themeChangeTimeout = null;
        this._textSource = null;
        this._optionsContext = null;
        this._targetOrigin = chrome.runtime.getURL('/').replace(/\/$/, '');

        this._windowMessageHandlers = new Map([
            ['setText',              this._setText.bind(this)],
            ['setCustomCss',         this._setCustomCss.bind(this)],
            ['setCustomOuterCss',    this._setCustomOuterCss.bind(this)],
            ['updateOptionsContext', this._updateOptionsContext.bind(this)]
        ]);
    }

    async prepare() {
        window.addEventListener('message', this._onMessage.bind(this), false);

        // Setup events
        document.querySelector('#theme-dark-checkbox').addEventListener('change', this._onThemeDarkCheckboxChanged.bind(this), false);

        // Overwrite API functions
        this._apiOptionsGetOld = api.optionsGet.bind(api);
        api.optionsGet = this._apiOptionsGet.bind(this);

        // Overwrite frontend
        const {frameId} = await api.frameInformationGet();

        const popupFactory = new PopupFactory(frameId);
        await popupFactory.prepare();

        this._popup = popupFactory.getOrCreatePopup();
        this._popup.setChildrenSupported(false);

        this._popupSetCustomOuterCssOld = this._popup.setCustomOuterCss.bind(this._popup);
        this._popup.setCustomOuterCss = this._popupSetCustomOuterCss.bind(this);

        this._frontend = new Frontend(this._popup);
        this._frontendGetOptionsContextOld = this._frontend.getOptionsContext.bind(this._frontend);
        this._frontend.getOptionsContext = this._getOptionsContext.bind(this);
        await this._frontend.prepare();
        this._frontend.setDisabledOverride(true);
        this._frontend.canClearSelection = false;

        // Update search
        this._updateSearch();
    }

    // Private

    async _getOptionsContext() {
        let optionsContext = this._optionsContext;
        if (optionsContext === null) {
            optionsContext = this._frontendGetOptionsContextOld();
        }
        return optionsContext;
    }

    async _apiOptionsGet(...args) {
        const options = await this._apiOptionsGetOld(...args);
        options.general.enable = true;
        options.general.debugInfo = false;
        options.general.popupWidth = 400;
        options.general.popupHeight = 250;
        options.general.popupHorizontalOffset = 0;
        options.general.popupVerticalOffset = 10;
        options.general.popupHorizontalOffset2 = 10;
        options.general.popupVerticalOffset2 = 0;
        options.general.popupHorizontalTextPosition = 'below';
        options.general.popupVerticalTextPosition = 'before';
        options.scanning.selectText = false;
        return options;
    }

    async _popupSetCustomOuterCss(...args) {
        // This simulates the stylesheet priorities when injecting using the web extension API.
        const result = await this._popupSetCustomOuterCssOld(...args);

        const node = document.querySelector('#client-css');
        if (node !== null && result !== null) {
            node.parentNode.insertBefore(result, node);
        }

        return result;
    }

    _onMessage(e) {
        if (e.origin !== this._targetOrigin) { return; }

        const {action, params} = e.data;
        const handler = this._windowMessageHandlers.get(action);
        if (typeof handler !== 'function') { return; }

        handler(params);
    }

    _onThemeDarkCheckboxChanged(e) {
        document.documentElement.classList.toggle('dark', e.target.checked);
        if (this._themeChangeTimeout !== null) {
            clearTimeout(this._themeChangeTimeout);
        }
        this._themeChangeTimeout = setTimeout(() => {
            this._themeChangeTimeout = null;
            this._popup.updateTheme();
        }, 300);
    }

    _setText({text}) {
        const exampleText = document.querySelector('#example-text');
        if (exampleText === null) { return; }

        exampleText.textContent = text;
        this._updateSearch();
    }

    _setInfoVisible(visible) {
        const node = document.querySelector('.placeholder-info');
        if (node === null) { return; }

        node.classList.toggle('placeholder-info-visible', visible);
    }

    _setCustomCss({css}) {
        if (this._frontend === null) { return; }
        this._popup.setCustomCss(css);
    }

    _setCustomOuterCss({css}) {
        if (this._frontend === null) { return; }
        this._popup.setCustomOuterCss(css, false);
    }

    async _updateOptionsContext({optionsContext}) {
        this._optionsContext = optionsContext;
        await this._frontend.updateOptions();
        await this._updateSearch();
    }

    async _updateSearch() {
        const exampleText = document.querySelector('#example-text');
        if (exampleText === null) { return; }

        const textNode = exampleText.firstChild;
        if (textNode === null) { return; }

        const range = document.createRange();
        range.selectNode(textNode);
        const source = new TextSourceRange(range, range.toString(), null, null);

        try {
            await this._frontend.setTextSource(source);
        } finally {
            source.cleanup();
        }
        this._textSource = source;
        await this._frontend.showContentCompleted();

        if (this._popup.isVisibleSync()) {
            this._popupShown = true;
        }

        this._setInfoVisible(!this._popupShown);
    }
}