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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);
}
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