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MAJOR CHANGE to theming system:

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* Less complex
* Themes are only loaded once. Users share avail themes[] objects
* Themes are applied to configuration _once_
* Users can switch themes in configuration
* Other related improvements
This commit is contained in:
Bryan Ashby 2016-01-14 22:44:33 -07:00
parent ef047bc515
commit 4fdd3dbbfe
8 changed files with 207 additions and 66 deletions
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180
core/theme.js
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@ -7,6 +7,7 @@ var ansi = require('./ansi_term.js');
var miscUtil = require('./misc_util.js');
var Log = require('./logger.js').log;
var configCache = require('./config_cache.js');
var getFullConfig = require('./config_util.js').getFullConfig;
var asset = require('./asset.js');
var ViewController = require('./view_controller.js').ViewController;
@ -16,11 +17,10 @@ var async = require('async');
var _ = require('lodash');
var assert = require('assert');
exports.loadTheme = loadTheme;
exports.getThemeArt = getThemeArt;
exports.getAvailableThemes = getAvailableThemes;
exports.getRandomTheme = getRandomTheme;
exports.setClientTheme = setClientTheme;
exports.initAvailableThemes = initAvailableThemes;
exports.displayThemeArt = displayThemeArt;
exports.displayThemedPause = displayThemedPause;
@ -102,25 +102,174 @@ function loadTheme(themeID, cb) {
var availableThemes = {};
var IMMUTABLE_MCI_PROPERTIES = [
'maxLength', 'argName', 'submit', 'validate'
];
function getMergedTheme(menuConfig, promptConfig, theme) {
assert(_.isObject(menuConfig));
assert(_.isObject(theme));
// :TODO: merge in defaults (customization.defaults{} )
// :TODO: apply generic stuff, e.g. "VM" (vs "VM1")
//
// Create a *clone* of menuConfig (menu.hjson) then bring in
// promptConfig (prompt.hjson)
//
var mergedTheme = _.cloneDeep(menuConfig);
if(_.isObject(promptConfig.prompts)) {
mergedTheme.prompts = _.cloneDeep(promptConfig.prompts);
}
//
// Add in data we won't be altering directly from the theme
//
mergedTheme.info = theme.info;
mergedTheme.helpers = theme.helpers;
//
// merge customizer to disallow immutable MCI properties
//
var mciCustomizer = function(objVal, srcVal, key) {
return IMMUTABLE_MCI_PROPERTIES.indexOf(key) > -1 ? objVal : srcVal;
};
function getFormKeys(fromObj) {
return _.remove(_.keys(fromObj), function pred(k) {
return !isNaN(k); // remove all non-numbers
});
}
function mergeMciProperties(dest, src) {
Object.keys(src).forEach(function mciEntry(mci) {
_.merge(dest[mci], src[mci], mciCustomizer);
});
}
function applyThemeMciBlock(dest, src, formKey) {
if(_.isObject(src.mci)) {
mergeMciProperties(dest, src.mci);
} else {
if(_.has(src, [ formKey, 'mci' ])) {
mergeMciProperties(dest, src[formKey].mci);
}
}
}
//
// menu.hjson can have a couple different structures:
// 1) Explicit declaration of expected MCI code(s) under 'form:<id>' before a 'mci' block
// (this allows multiple layout types defined by one menu for example)
//
// 2) Non-explicit declaration: 'mci' directly under 'form:<id>'
//
// theme.hjson has it's own mix:
// 1) Explicit: Form ID before 'mci' (generally used where there are > 1 forms)
//
// 2) Non-explicit: 'mci' directly under an entry
//
// Additionally, #1 or #2 may be under an explicit key of MCI code(s) to match up
// with menu.hjson in #1.
//
// * When theming an explicit menu.hjson entry (1), we will use a matching explicit
// entry with a matching MCI code(s) key in theme.hjson (e.g. menu="ETVM"/theme="ETVM"
// and fall back to generic if a match is not found.
//
// * If theme.hjson provides form ID's, use them. Otherwise, we'll apply directly assuming
// there is a generic 'mci' block.
//
function applyToForm(form, menuTheme, formKey) {
if(_.isObject(form.mci)) {
// non-explicit: no MCI code(s) key assumed since we found 'mci' directly under form ID
applyThemeMciBlock(form.mci, menuTheme, formKey);
} else {
var menuMciCodeKeys = _.remove(_.keys(form), function pred(k) {
return k === k.toUpperCase(); // remove anything not uppercase
});
menuMciCodeKeys.forEach(function mciKeyEntry(mciKey) {
var applyFrom;
if(_.has(menuTheme, [ mciKey, 'mci' ])) {
applyFrom = menuTheme[mciKey];
} else {
applyFrom = menuTheme;
}
applyThemeMciBlock(form[mciKey].mci, applyFrom);
});
}
}
[ 'menus', 'prompts' ].forEach(function areaEntry(areaName) {
_.keys(mergedTheme[areaName]).forEach(function menuEntry(menuName) {
if(_.has(theme, [ 'customization', areaName, menuName ])) {
var menuTheme = theme.customization[areaName][menuName];
var mergedThemeMenu = mergedTheme[areaName][menuName];
// config block is direct assign/overwrite
// :TODO: should probably be _.merge()
if(menuTheme.config) {
mergedThemeMenu.config = _.assign(mergedThemeMenu || {}, menuTheme.config);
}
if('menus' === areaName) {
if(_.isObject(mergedThemeMenu.form)) {
getFormKeys(mergedThemeMenu.form).forEach(function formKeyEntry(formKey) {
applyToForm(mergedThemeMenu.form[formKey], menuTheme, formKey);
});
}
} else if('prompts' === areaName) {
// no 'form' or form keys for prompts -- direct to mci
applyToForm(mergedThemeMenu, menuTheme);
}
}
});
});
return mergedTheme;
}
function initAvailableThemes(cb) {
var menuConfig;
var promptConfig;
async.waterfall(
[
function loadMenuConfig(callback) {
getFullConfig(Config.general.menuFile, function gotConfig(err, mc) {
menuConfig = mc;
callback(err);
});
},
function loadPromptConfig(callback) {
getFullConfig(Config.general.promptFile, function gotConfig(err, pc) {
promptConfig = pc;
callback(err);
});
},
function getDir(callback) {
fs.readdir(Config.paths.themes, function onReadDir(err, files) {
fs.readdir(Config.paths.themes, function dirRead(err, files) {
callback(err, files);
});
},
function filterFiles(files, callback) {
var filtered = files.filter(function onFilter(file) {
var filtered = files.filter(function filter(file) {
return fs.statSync(paths.join(Config.paths.themes, file)).isDirectory();
});
callback(null, filtered);
},
function populateAvailable(filtered, callback) {
filtered.forEach(function onTheme(themeId) {
// :TODO: this is a bit broken with callback placement and configCache.on() handler
filtered.forEach(function themeEntry(themeId) {
loadTheme(themeId, function themeLoaded(err, theme, themePath) {
if(!err) {
availableThemes[themeId] = theme;
availableThemes[themeId] = getMergedTheme(menuConfig, promptConfig, theme);
configCache.on('recached', function recached(path) {
if(themePath === path) {
@ -164,6 +313,20 @@ function getRandomTheme() {
}
}
function setClientTheme(client, themeId) {
var desc;
try {
client.currentTheme = getAvailableThemes()[themeId];
desc = 'Set client theme';
} catch(e) {
client.currentTheme = getAvailableThemes()[Config.defaults.theme];
desc = 'Failed setting theme by supplied ID; Using default';
}
client.log.debug( { themeId : themeId, info : client.currentTheme.info }, desc);
}
function getThemeArt(options, cb) {
//
// options - required:
@ -333,11 +496,12 @@ function displayThemedPause(options, cb) {
},
function clearPauseArt(callback) {
if(options.clearPrompt) {
if(artInfo.startRow) {
if(artInfo.startRow && artInfo.height) {
options.client.term.rawWrite(ansi.goto(artInfo.startRow, 1));
// :TODO: This will not work with NetRunner:
options.client.term.rawWrite(ansi.deleteLine(artInfo.height));
} else {
options.client.term.rawWrite(ansi.up(1) + ansi.deleteLine());
options.client.term.rawWrite(ansi.eraseLine(1))
}
}
callback(null);