aboutsummaryrefslogtreecommitdiff
path: root/ext/fg/js/util.js
blob: 7248ae86f676a4b6b7272ed4010c7dabba991bb2 (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
/*
 * Copyright (C) 2016  Alex Yatskov <alex@foosoft.net>
 * Author: Alex Yatskov <alex@foosoft.net>
 *
 * 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/>.
 */


function invokeApiBg(action, params) {
    return new Promise((resolve, reject) => {
        chrome.runtime.sendMessage({action, params}, (result, error) => {
            if (error) {
                reject(error);
            } else {
                resolve(result);
            }
        });
    });
}

function getEnabled() {
    return invokeApiBg('getEnabled', {});
}

function getOptions() {
    return invokeApiBg('getOptions', {});
}

function findTerm(text) {
    return invokeApiBg('findTerm', {text});
}

function findKanji(text) {
    return invokeApiBg('findKanji', {text});
}

function renderText(data, template) {
    return invokeApiBg('renderText', {data, template});
}

function canAddDefinitions(definitions, modes) {
    return invokeApiBg('canAddDefinitions', {definitions, modes});
}

function addDefinition(definition, mode) {
    return invokeApiBg('addDefinition', {definition, mode});
}

function textSourceFromPoint(point) {
    const element = document.elementFromPoint(point.x, point.y);
    if (element !== null) {
        const names = ['IMG', 'INPUT', 'BUTTON', 'TEXTAREA'];
        if (names.includes(element.nodeName)) {
            return new TextSourceElement(element);
        }
    }

    const range = document.caretRangeFromPoint(point.x, point.y);
    if (range !== null) {
        return new TextSourceRange(range);
    }

    return null;
}

function extractSentence(source, extent) {
    const quotesFwd = {'「': '」', '『': '』', "'": "'", '"': '"'};
    const quotesBwd = {'」': '「', '』': '『', "'": "'", '"': '"'};
    const terminators = '…。..??!!';

    const sourceLocal = source.clone();
    const position = sourceLocal.setStartOffset(extent);
    sourceLocal.setEndOffset(position + extent);
    const content = sourceLocal.text();

    let quoteStack = [];

    let startPos = 0;
    for (let i = position; i >= startPos; --i) {
        const c = content[i];

        if (quoteStack.length === 0 && (terminators.includes(c) || c in quotesFwd)) {
            startPos = i + 1;
            break;
        }

        if (quoteStack.length > 0 && c === quoteStack[0]) {
            quoteStack.pop();
        } else if (c in quotesBwd) {
            quoteStack = [quotesBwd[c]].concat(quoteStack);
        }
    }

    quoteStack = [];

    let endPos = content.length;
    for (let i = position; i < endPos; ++i) {
        const c = content[i];

        if (quoteStack.length === 0) {
            if (terminators.includes(c)) {
                endPos = i + 1;
                break;
            }
            else if (c in quotesBwd) {
                endPos = i;
                break;
            }
        }

        if (quoteStack.length > 0 && c === quoteStack[0]) {
            quoteStack.pop();
        } else if (c in quotesFwd) {
            quoteStack = [quotesFwd[c]].concat(quoteStack);
        }
    }

    return content.substring(startPos, endPos).trim();
}