rx-player
Version:
Canal+ HTML5 Video Player
108 lines (107 loc) • 4 kB
JavaScript
;
/**
* Copyright 2015 CANAL+ Group
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = resolveStylesInheritance;
var log_1 = require("../../../log");
var array_find_index_1 = require("../../../utils/array_find_index");
var array_includes_1 = require("../../../utils/array_includes");
var object_assign_1 = require("../../../utils/object_assign");
/**
* Transform all styles inheriting from other styles to the same styles but with
* the inheritance removed (by resolving those inheritance here).
*
* Note that the original style object is directly mutated with every
* inheritance they had resolved and removed.
*
* To make a pseudo-code analogy this would be equivalent to transform those
* two classes:
* ```
* class A {
* methodA() {}
* }
*
* class B extends A {
* method B() {}
* }
* ```
* into the same two classes without inheritance:
* ```
* class A {
* methodA() {}
* }
* class B {
* methodA() {} // inherited from class A
* methodB() {}
* }
* ```
*
* Doing this here allows to simplify further treatment of those styles.
* @param {Array.<Object>} styles
*/
function resolveStylesInheritance(styles) {
// keep track of all the indexes parsed to avoid infinite loops
var recursivelyBrowsedIndexes = [];
function resolveStyleInheritance(styleElt, index) {
var e_1, _a;
recursivelyBrowsedIndexes.push(index);
var _loop_1 = function (extendedStyleID) {
var extendedStyleIndex = (0, array_find_index_1.default)(styles, function (x) { return x.id === extendedStyleID; });
if (extendedStyleIndex < 0) {
log_1.default.warn("TTML Parser: unknown style inheritance: " + extendedStyleID);
}
else {
var extendedStyle = styles[extendedStyleIndex];
if ((0, array_includes_1.default)(recursivelyBrowsedIndexes, extendedStyleIndex)) {
log_1.default.warn("TTML Parser: infinite style inheritance loop avoided");
}
else {
resolveStyleInheritance(extendedStyle, extendedStyleIndex);
}
styleElt.style = (0, object_assign_1.default)({}, extendedStyle.style, styleElt.style);
}
};
try {
for (var _b = __values(styleElt.extendsStyles), _c = _b.next(); !_c.done; _c = _b.next()) {
var extendedStyleID = _c.value;
_loop_1(extendedStyleID);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_1) throw e_1.error; }
}
styleElt.extendsStyles.length = 0;
}
for (var i = 0; i < styles.length; i++) {
resolveStyleInheritance(styles[i], i);
recursivelyBrowsedIndexes.length = 0; // reset
}
}