pitaya-launcher/js/util/desktop-apps.js

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var path = require('path');
var System = require('./system');
var debug = require('./debug')('desktop-apps');
var Cache = require('./cache');
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// Constants
var ICON_REALPATH_REGEX = /\..+$/;
var ICON_THEMES_ROOTDIR = '/usr/share/icons';
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var PIXMAPS_ICONS_ROOTDIR = '/usr/share/pixmaps';
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/**
* Find and load all the desktop files in the subdirectories of given dirs
*
* @param Array[String] rootDirs
* @return Promise
*/
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exports.loadAllDesktopFiles = function(rootDirs) {
return exports.findAllDesktopFiles(rootDirs)
.then(function(filePaths) {
var promises = filePaths.map(function(path) {
return exports.loadDesktopFile(path);
});
return Promise.all(promises)
.then(function(contents) {
return contents.map(function(content, i) {
return { content: content, path: filePaths[i] };
});
})
;
})
;
};
/**
* Find all the desktop files in the subdirectories of given dirs
*
* @param Array[String] baseDirs
* @return Promise
*/
exports.findAllDesktopFiles = function(baseDirs) {
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if(!Array.isArray(baseDirs)) {
baseDirs = [baseDirs];
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}
var promises = baseDirs.map(function(baseDir) {
return System.findFiles('**/*.desktop', {cwd: baseDir, realpath: true});
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});
return Promise.all(promises)
.then(function(apps) {
return uniq(flatten(apps));
})
;
};
/**
* Load a .desktop file ans return its parsed content
*
* @param string filePath
* @return Promise
*/
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exports.loadDesktopFile = function(filePath) {
return System.loadINIFile(filePath);
};
var iconCache = new Cache();
/**
* Find the absolute path of a desktop icon
*
* @param string iconPath
* @return Promise
*/
exports.findIcon = function(iconName, themeName, size, themeIgnore) {
var cachedIcon = iconCache.get([iconName, themeName, size]);
if(cachedIcon) {
debug('Icon %s:%s:%s found in cache !', iconName, themeName, size);
return Promise.resolve(cachedIcon);
}
themeIgnore = themeIgnore || [];
if(themeIgnore.indexOf(themeIgnore) !== -1) {
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debug('Theme %s already processed, ignoring...', themeName);
return Promise.resolve(null);
}
themeIgnore.push(themeName);
debug('Finding icon %s:%s:%s...', iconName, themeName, size);
if( ICON_REALPATH_REGEX.test(iconName) ) {
return Promise.resolve(iconName);
}
if(!themeName) {
return exports.findIconThemes()
.then(function(themes) {
themeIgnore = themeIgnore || [];
var promises = themes.map(function(theme) {
return exports.findIcon(iconName, theme, size, themeIgnore);
});
return Promise.all(promises)
.then(exports._selectBestIcon)
;
})
.then(_cacheIcon)
;
}
return exports.findClosestSizeIcon(iconName, themeName, size)
.then(function(foundIcon) {
if(foundIcon) return foundIcon;
debug('No icon found. Search in parents...');
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return exports.findParentsThemeIcon(iconName, themeName, size, themeIgnore)
.then(function(iconPath) {
if(iconPath) return iconPath;
return exports.findPixmapsIcon(iconName);
})
;
})
.then(_cacheIcon)
;
function _cacheIcon(iconPath) {
iconCache.set([iconName, themeName, size], iconPath);
return iconPath;
}
};
exports.findParentsThemeIcon = function(iconName, themeName, size, themeIgnore) {
return exports.themeIndexExists(themeName)
.then(function(exists) {
if(!exists) return null;
return exports.loadThemeIndex(themeName)
.then(function(themeIndex) {
if(!themeIndex || !themeIndex['Icon Theme'].Inherits) return;
var parents = themeIndex['Icon Theme'].Inherits.split(',');
debug('Found parents %j', parents);
var promises = parents.map(function(themeName) {
return exports.findIcon(iconName, themeName, size, themeIgnore);
});
return Promise.all(promises)
.then(exports._selectBestIcon)
;
})
;
})
;
};
exports.findClosestSizeIcon = function(iconName, themeName, size) {
var themePath = path.join(ICON_THEMES_ROOTDIR, themeName);
var extPattern = '{svg,png}';
var filePattern = themeName+'/*/*/'+iconName+'.'+extPattern;
debug('File pattern %s', filePattern);
return System.findFiles(filePattern, {cwd: ICON_THEMES_ROOTDIR})
.then(function(iconFiles) {
debug('Found files %j', iconFiles);
var scalableIcon = iconFiles.reduce(function(scalableIcon, iconPath) {
if(iconPath.indexOf('scalable') !== -1) {
debug('Found scalable icon %s', iconPath);
scalableIcon = iconPath;
}
return scalableIcon;
}, null);
if(scalableIcon) return scalableIcon;
if(!size) {
size = Math.max.apply(Math, clean(iconFiles.map(sizeFromPath)));
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}
var closestIcon = iconFiles.reduce(function(foundIcon, iconPath) {
var foundSize = sizeFromPath(iconPath);
if( foundSize && Math.abs(foundSize - size) < Math.abs(foundIcon.size - size) ) {
foundIcon.path = iconPath;
foundIcon.size = foundSize;
}
return foundIcon;
}, {path: null, size: null});
return closestIcon.path;
})
.then(function(iconPath) {
debug('Closest icon %j', iconPath);
return iconPath ? path.join(ICON_THEMES_ROOTDIR, iconPath) : null;
})
;
function sizeFromPath(iconPath) {
var simpleSizeRegex = /\/(\d+)\//;
var matches = simpleSizeRegex.exec(iconPath);
if(matches && matches[1]) return +matches[1];
var doubleSizeRegex = /\/(\d+)x\d+\//;
matches = doubleSizeRegex.exec(iconPath);
if(matches && matches[1]) return +matches[1];
}
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};
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exports.findPixmapsIcon = function(iconName) {
var filePattern = iconName+'.{svg,png}';
debug('Looking for pixmap icon %s', filePattern);
return System.findFiles(filePattern, {cwd: PIXMAPS_ICONS_ROOTDIR})
.then(function(iconPaths) {
iconPaths = iconPaths.map(function(iconPath) {
return path.join(PIXMAPS_ICONS_ROOTDIR, iconPath);
});
return exports._selectBestIcon(iconPaths);
})
;
};
exports.findIconThemes = function() {
return System.findFiles('*/', {cwd: ICON_THEMES_ROOTDIR, realpath: true})
.then(function(files) {
return files.map(path.basename.bind(path));
})
;
};
exports.loadThemeIndex = function(themeName) {
var themeIndexPath = path.join(ICON_THEMES_ROOTDIR, themeName, 'index.theme');
return System.loadINIFile(themeIndexPath);
};
exports.themeIndexExists = function(themeName) {
var themeIndexPath = path.join(ICON_THEMES_ROOTDIR, themeName, 'index.theme');
return System.exists(themeIndexPath);
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};
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exports._selectBestIcon = function(iconPaths) {
var iconSelection = iconPaths.reduce(function(iconSelection, iconPath) {
if(iconPath) {
var key = iconPath.indexOf('scalable') !== -1 ? 'scalable' : 'bitmap';
iconSelection[key] = iconPath;
}
return iconSelection;
}, {scalable: null, bitmap: null});
debug('Icon selection %j', iconSelection);
return iconSelection.scalable || iconSelection.bitmap;
};
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// Array helpers
function clean(arr) {
return arr.filter(function(item) {
return item !== null && item !== undefined;
});
}
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function flatten(arr) {
return arr.reduce(function(result, item) {
result = result.concat.apply(result, Array.isArray(item) ? flatten(item) : [item]);
return result;
}, []);
}
function uniq(arr) {
return arr.reduce(function(result, item) {
if(result.indexOf(item) === -1) {
result.push(item);
}
return result;
}, []);
}