aboutsummaryrefslogtreecommitdiff
path: root/editors/code/src/scopes.ts
blob: 98099872cc7ff0b68c49d8b4cb63bd803642aac2 (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
import * as fs from 'fs';
import * as path from 'path';
import * as vscode from 'vscode';

export interface TextMateRule {
    scope: string | string[];
    settings: TextMateRuleSettings;
}

export interface TextMateRuleSettings {
    foreground: string | undefined;
    background: string | undefined;
    fontStyle: string | undefined;
}

// Current theme colors
const rules = new Map<string, TextMateRuleSettings>();

export function find(scope: string): TextMateRuleSettings | undefined {
    return rules.get(scope);
}

// Load all textmate scopes in the currently active theme
export function load() {
    // Remove any previous theme
    rules.clear();
    // Find out current color theme
    const themeName = vscode.workspace
        .getConfiguration('workbench')
        .get('colorTheme');

    if (typeof themeName !== 'string') {
        // console.warn('workbench.colorTheme is', themeName)
        return;
    }
    // Try to load colors from that theme
    try {
        loadThemeNamed(themeName);
    } catch (e) {
        // console.warn('failed to load theme', themeName, e)
    }
}

function filterThemeExtensions(extension: vscode.Extension<any>): boolean {
    return (
        extension.extensionKind === vscode.ExtensionKind.UI &&
        extension.packageJSON.contributes &&
        extension.packageJSON.contributes.themes
    );
}

// Find current theme on disk
function loadThemeNamed(themeName: string) {
    const themePaths = vscode.extensions.all
        .filter(filterThemeExtensions)
        .reduce((list, extension) => {
            return extension.packageJSON.contributes.themes
                .filter(
                    (element: any) =>
                        (element.id || element.label) === themeName
                )
                .map((element: any) =>
                    path.join(extension.extensionPath, element.path)
                )
                .concat(list);
        }, Array<string>());

    themePaths.forEach(loadThemeFile);

    const tokenColorCustomizations: [any] = [
        vscode.workspace
            .getConfiguration('editor')
            .get('tokenColorCustomizations')
    ];

    tokenColorCustomizations
        .filter(custom => custom && custom.textMateRules)
        .map(custom => custom.textMateRules)
        .forEach(loadColors);
}

function loadThemeFile(themePath: string) {
    const themeContent = [themePath]
        .filter(isFile)
        .map(readFileText)
        .map(parseJSON)
        .filter(theme => theme);

    themeContent
        .filter(theme => theme.tokenColors)
        .map(theme => theme.tokenColors)
        .forEach(loadColors);

    themeContent
        .filter(theme => theme.include)
        .map(theme => path.join(path.dirname(themePath), theme.include))
        .forEach(loadThemeFile);
}

function mergeRuleSettings(
    defaultSetting: TextMateRuleSettings | undefined,
    override: TextMateRuleSettings
): TextMateRuleSettings {
    if (defaultSetting === undefined) {
        return override;
    }
    const mergedRule = defaultSetting;

    mergedRule.background = override.background || defaultSetting.background;
    mergedRule.foreground = override.foreground || defaultSetting.foreground;
    mergedRule.fontStyle = override.fontStyle || defaultSetting.foreground;

    return mergedRule;
}

function updateRules(
    scope: string,
    updatedSettings: TextMateRuleSettings
): void {
    [rules.get(scope)]
        .map(settings => mergeRuleSettings(settings, updatedSettings))
        .forEach(settings => rules.set(scope, settings));
}

function loadColors(textMateRules: TextMateRule[]): void {
    textMateRules.forEach(rule => {
        if (typeof rule.scope === 'string') {
            updateRules(rule.scope, rule.settings);
        } else if (rule.scope instanceof Array) {
            rule.scope.forEach(scope => updateRules(scope, rule.settings));
        }
    });
}

function isFile(filePath: string): boolean {
    return [filePath].map(fs.statSync).every(stat => stat.isFile());
}

function readFileText(filePath: string): string {
    return fs.readFileSync(filePath, 'utf8');
}

// Might need to replace with JSONC if a theme contains comments.
function parseJSON(content: string): any {
    return JSON.parse(content);
}