stuff

node_modules/mathjax-full/ts/input/tex/extpfeil/ExtpfeilConfiguration.ts

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+/*************************************************************
+ *
+ *  Copyright (c) 2018-2022 The MathJax Consortium
+ *
+ *  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.
+ */
+
+
+/**
+ * @fileoverview Configuration file for the extpfeil package. Note that this is
+ *     based on AMS package and Newcommand utilities.
+ *
+ * @author v.sorge@mathjax.org (Volker Sorge)
+ */
+
+import {Configuration, ParserConfiguration} from '../Configuration.js';
+import TexParser from '../TexParser.js';
+import {CommandMap} from '../SymbolMap.js';
+import {ParseMethod} from '../Types.js';
+import {AmsMethods} from '../ams/AmsMethods.js';
+import NewcommandUtil from '../newcommand/NewcommandUtil.js';
+import {NewcommandConfiguration} from '../newcommand/NewcommandConfiguration.js';
+import TexError from '../TexError.js';
+
+
+// Namespace
+export let ExtpfeilMethods: Record<string, ParseMethod> = {};
+
+ExtpfeilMethods.xArrow = AmsMethods.xArrow;
+
+/**
+ * Implements \Newextarrow to define a new arrow.
+ * @param {TexParser} parser The current tex parser.
+ * @param {string} name The name of the calling macro.
+ */
+ExtpfeilMethods.NewExtArrow = function(parser: TexParser, name: string) {
+  let cs = parser.GetArgument(name);
+  const space = parser.GetArgument(name);
+  const chr = parser.GetArgument(name);
+  if (!cs.match(/^\\([a-z]+|.)$/i)) {
+    throw new TexError('NewextarrowArg1',
+               'First argument to %1 must be a control sequence name', name);
+  }
+  if (!space.match(/^(\d+),(\d+)$/)) {
+    throw new TexError(
+      'NewextarrowArg2',
+      'Second argument to %1 must be two integers separated by a comma',
+      name);
+  }
+  if (!chr.match(/^(\d+|0x[0-9A-F]+)$/i)) {
+    throw new TexError(
+      'NewextarrowArg3',
+      'Third argument to %1 must be a unicode character number',
+      name);
+  }
+  cs = cs.substr(1);
+  let spaces = space.split(',');
+  NewcommandUtil.addMacro(parser, cs, ExtpfeilMethods.xArrow,
+                          [parseInt(chr), parseInt(spaces[0]), parseInt(spaces[1])]);
+};
+
+
+new CommandMap('extpfeil', {
+  xtwoheadrightarrow: ['xArrow', 0x21A0, 12, 16],
+  xtwoheadleftarrow:  ['xArrow', 0x219E, 17, 13],
+  xmapsto:            ['xArrow', 0x21A6, 6, 7],
+  xlongequal:         ['xArrow', 0x003D, 7, 7],
+  xtofrom:            ['xArrow', 0x21C4, 12, 12],
+  Newextarrow:        'NewExtArrow'
+}, ExtpfeilMethods);
+
+
+let init = function(config: ParserConfiguration) {
+  NewcommandConfiguration.init(config);
+};
+
+export const ExtpfeilConfiguration = Configuration.create(
+  'extpfeil', {
+    handler: {macro: ['extpfeil']},
+    init: init
+  }
+);