      1 /*
      2     Copyright 2008-2023
      3         Matthias Ehmann,
      4         Michael Gerhaeuser,
      5         Carsten Miller,
      6         Bianca Valentin,
      7         Alfred Wassermann,
      8         Peter Wilfahrt
      9
     10     This file is part of JSXGraph.
     11
     12     JSXGraph is free software dual licensed under the GNU LGPL or MIT License.
     13
     14     You can redistribute it and/or modify it under the terms of the
     15
     16       * GNU Lesser General Public License as published by
     17         the Free Software Foundation, either version 3 of the License, or
     18         (at your option) any later version
     19       OR
     20       * MIT License: https://github.com/jsxgraph/jsxgraph/blob/master/LICENSE.MIT
     21
     22     JSXGraph is distributed in the hope that it will be useful,
     23     but WITHOUT ANY WARRANTY; without even the implied warranty of
     24     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     25     GNU Lesser General Public License for more details.
     26
     27     You should have received a copy of the GNU Lesser General Public License and
     28     the MIT License along with JSXGraph. If not, see <https://www.gnu.org/licenses/>
     29     and <https://opensource.org/licenses/MIT/>.
     30  */
     31
     32 /*global JXG: true, define: true, window: true*/
     33 /*jslint nomen: true, plusplus: true*/
     34
     35 /**
     36  * @fileoverview In this file the Text element is defined.
     37  */
     38
     39 import JXG from "../jxg";
     40 import Env from "../utils/env";
     41 import Type from "../utils/type";
     42
     43 /**
     44  * @class
     45  * @ignore
     46  */
     47 var priv = {
     48      /**
     49      * @class
     50      * @ignore
     51      */
     52
     53     InputInputEventHandler: function (evt) {
     54         this._value = this.rendNodeInput.value;
     55         this.board.update();
     56     }
     57 };
     58
     59 /**
     60  * @class This element is used to provide a constructor for special texts containing a
     61  * HTML form input element.
     62  * <p>
     63  * If the width of element is set with the attribute "cssStyle", the width of the
     64  * label must be added.
     65  * <p>
     66  * For this element, the attribute "display" has to have the value 'html' (which is the default).
     67  * <p>
     68  * The underlying HTML input field can be accessed through the sub-object 'rendNodeInput', e.g. to
     69  * add event listeners.
     70  *
     71  * @pseudo
     72  * @name Input
     73  * @augments Text
     74  * @constructor
     75  * @type JXG.Text
     76  *
     77  * @param {number,function_number,function_String_String,function} x,y,value,label Parent elements for input elements.
     78  *   <p>
     79  *   x and y are the coordinates of the lower left corner of the text box. The position of the text is fixed,
     80  *   x and y are numbers. The position is variable if x or y are functions.
     81  *   <p>
     82  *   The default value of the input element must be given as string.
     83  *   <p>
     84  *   The label of the input element may be given as string or function.
     85  *
     86  * @example
     87  *  // Create an input element at position [1,4].
     88  *  var input = board.create('input', [0, 1, 'sin(x)*x', 'f(x)='], {cssStyle: 'width: 100px'});
     89  *  var f = board.jc.snippet(input.Value(), true, 'x', false);
     90  *  var graph = board.create('functiongraph',[f,
     91  *          function() {
     92  *            var c = new JXG.Coords(JXG.COORDS_BY_SCREEN,[0,0],board);
     93  *            return c.usrCoords[1];
     94  *          },
     95  *          function() {
     96  *            var c = new JXG.Coords(JXG.COORDS_BY_SCREEN,[board.canvasWidth,0],board);
     97  *            return c.usrCoords[1];
     98  *          }
     99  *        ]);
    100  *
    101  *  board.create('text', [1, 3, '<button onclick="updateGraph()">Update graph</button>']);
    102  *
    103  *  var updateGraph = function() {
    104  *      graph.Y = board.jc.snippet(input.Value(), true, 'x', false);
    105  *      graph.updateCurve();
    106  *      board.update();
    107  *  }
    108  * </pre><div class="jxgbox" id="JXGc70f55f1-21ba-4719-a37d-a93ae2943faa" style="width: 500px; height: 300px;"></div>
    109  * <script type="text/javascript">
    110  *   var t1_board = JXG.JSXGraph.initBoard('JXGc70f55f1-21ba-4719-a37d-a93ae2943faa', {boundingbox: [-3, 6, 5, -3], axis: true, showcopyright: false, shownavigation: false});
    111  *   var input = t1_board.create('input', [1, 4, 'sin(x)*x', 'f(x)='], {cssStyle: 'width: 100px'});
    112  *   var f = t1_board.jc.snippet(input.Value(), true, 'x', false);
    113  *   var graph = t1_board.create('functiongraph',[f,
    114  *          function() {
    115  *            var c = new JXG.Coords(JXG.COORDS_BY_SCREEN,[0,0],t1_board);
    116  *            return c.usrCoords[1];
    117  *          },
    118  *          function() {
    119  *            var c = new JXG.Coords(JXG.COORDS_BY_SCREEN,[t1_board.canvasWidth,0],t1_board);
    120  *            return c.usrCoords[1];
    121  *          }
    122  *        ]);
    123  *
    124  *  t1_board.create('text', [1, 3, '<button onclick="updateGraph()">Update graph</button>']);
    125  *
    126  *  var updateGraph = function() {
    127  *      graph.Y = t1_board.jc.snippet(input.Value(), true, 'x', false);
    128  *      graph.updateCurve();
    129  *      t1_board.update();
    130  *  }
    131  * </script><pre>
    132  *
    133  * @example
    134  * // Add the `keyup` event to an input field
    135  * var A = board.create('point', [3, -2]);
    136  * var i = board.create('input', [-4, -4, "1", "x "]);
    137  *
    138  * i.rendNodeInput.addEventListener("keyup", ( function () {
    139  *    var x = parseFloat(this.value);
    140  *    if (!isNaN(x)) {
    141  * 	   A.moveTo([x, 3], 100);
    142  *    }
    143  * }));
    144  *
    145  * </pre><div id="JXG81c84fa7-3f36-4874-9e0f-d4b9e93e755b" class="jxgbox" style="width: 300px; height: 300px;"></div>
    146  * <script type="text/javascript">
    147  *     (function() {
    148  *         var board = JXG.JSXGraph.initBoard('JXG81c84fa7-3f36-4874-9e0f-d4b9e93e755b',
    149  *             {boundingbox: [-5, 5, 5, -5], axis: true, showcopyright: false, shownavigation: false});
    150  *     var A = board.create('point', [3, -2]);
    151  *     var i = board.create('input', [-4, -4, "1", "x "]);
    152  *
    153  *     i.rendNodeInput.addEventListener("keyup", ( function () {
    154  *        var x = parseFloat(this.value);
    155  *        if (!isNaN(x)) {
    156  *     	    A.moveTo([x, 3], 100);
    157  *        }
    158  *     }));
    159  *
    160  *     })();
    161  *
    162  * </script><pre>
    163  *
    164  * @example
    165  * // Add the `change` event to an input field
    166  * var A = board.create('point', [3, -2]);
    167  * var i = board.create('input', [-4, -4, "1", "x "]);
    168  *
    169  * i.rendNodeInput.addEventListener("change", ( function () {
    170  *    var x = parseFloat(i.Value());
    171  *    A.moveTo([x, 2], 100);
    172  * }));
    173  *
    174  * </pre><div id="JXG51c4d78b-a7ad-4c34-a983-b3ddae6192d7" class="jxgbox" style="width: 300px; height: 300px;"></div>
    175  * <script type="text/javascript">
    176  *     (function() {
    177  *         var board = JXG.JSXGraph.initBoard('JXG51c4d78b-a7ad-4c34-a983-b3ddae6192d7',
    178  *             {boundingbox: [-8, 8, 8,-8], axis: true, showcopyright: false, shownavigation: false});
    179  *     var A = board.create('point', [3, -2]);
    180  *     var i = board.create('input', [-4, -4, "1", "x "]);
    181  *
    182  *     i.rendNodeInput.addEventListener("change", ( function () {
    183  *        var x = parseFloat(i.Value());
    184  *        A.moveTo([x, 2], 100);
    185  *     }));
    186  *
    187  *     })();
    188  *
    189  * </script><pre>
    190  *
    191  *
    192  * @example
    193  *   Apply CSS classes to label and input tag
    194  *     <style>
    195  *         div.JXGtext_inp {
    196  *             font-weight: bold;
    197  *         }
    198  *
    199  *         // Label
    200  *         div.JXGtext_inp > span > span {
    201  *             padding: 3px;
    202  *         }
    203  *
    204  *         // Input field
    205  *         div.JXGtext_inp > span > input {
    206  *             width: 100px;
    207  *             border: solid 4px red;
    208  *             border-radius: 25px;
    209  *         }
    210  *     </style>
    211  *
    212  * var inp = board.create('input', [-6, 1, 'x', 'y'], {
    213  *      CssClass: 'JXGtext_inp', HighlightCssClass: 'JXGtext_inp'
    214  * });
    215  *
    216  * </pre>
    217  *         <style>
    218  *             div.JXGtext_inp {
    219  *                 font-weight: bold;
    220  *             }
    221  *
    222  *             div.JXGtext_inp > span > span {
    223  *                 padding: 3px;
    224  *             }
    225  *
    226  *             div.JXGtext_inp > span > input {
    227  *                 width: 100px;
    228  *                 border: solid 4px red;
    229  *                 border-radius: 25px;
    230  *             }
    231  *         </style>
    232  * <div id="JXGa3642ebd-a7dc-41ac-beb2-0c9e705ab8b4" class="jxgbox" style="width: 300px; height: 300px;"></div>
    233  * <script type="text/javascript">
    234  *     (function() {
    235  *         var board = JXG.JSXGraph.initBoard('JXGa3642ebd-a7dc-41ac-beb2-0c9e705ab8b4',
    236  *             {boundingbox: [-8, 8, 8,-8], axis: true, showcopyright: false, shownavigation: false});
    237  *         var inp = board.create('input', [-6, 1, 'x', 'y'], {CssClass: 'JXGtext_inp', HighlightCssClass: 'JXGtext_inp'});
    238  *
    239  *     })();
    240  * </script><pre>
    241  *
    242  */
    243 JXG.createInput = function (board, parents, attributes) {
    244     var t,
    245         par,
    246         attr = Type.copyAttributes(attributes, board.options, "input");
    247
    248     par = [
    249         parents[0],
    250         parents[1],
    251         '<span style="display:inline; white-space:nowrap; padding:0px;">' +
    252             '<span></span><input type="text" maxlength="' +
    253             attr.maxlength +
    254             '" style="width:100%"/>' +
    255             "</span>"
    256     ];
    257
    258     // 1. Create input element with empty label
    259     t = board.create("text", par, attr);
    260     t.type = Type.OBJECT_TYPE_INPUT;
    261
    262     t.rendNodeLabel = t.rendNode.childNodes[0].childNodes[0];
    263     t.rendNodeInput = t.rendNode.childNodes[0].childNodes[1];
    264     // t.rendNodeLabel.innerHTML = parents[3];
    265     t.rendNodeInput.value = parents[2];
    266     t.rendNodeTag = t.rendNodeInput; // Needed for unified treatment in setAttribute
    267     t.rendNodeTag.disabled = !!attr.disabled;
    268     t.rendNodeLabel.id = t.rendNode.id + "_label";
    269     t.rendNodeInput.id = t.rendNode.id + "_input";
    270
    271     // 2. Set parents[3] (string|function) as label of the input element.
    272     // abstract.js selects the correct DOM element for the update
    273     t.setText(parents[3]);
    274
    275     t._value = parents[2];
    276
    277      /**
    278      * @class
    279      * @ignore
    280      */
    281     t.update = function () {
    282         if (this.needsUpdate) {
    283             JXG.Text.prototype.update.call(this);
    284             this._value = this.rendNodeInput.value;
    285         }
    286         return this;
    287     };
    288
    289     /**
    290      * Returns the value (content) of the input element
    291      * @name Value
    292      * @memberOf Input.prototype
    293      * @function
    294      * @returns {String} content of the input field.
    295      */
    296     t.Value = function () {
    297         return this._value;
    298     };
    299
    300     /**
    301      * Sets value of the input element.
    302      * @name set
    303      * @memberOf Input.prototype
    304      * @function
    305      *
    306      * @param {String} val
    307      * @returns {JXG.GeometryElement} Reference to the element.
    308      *
    309      * @example
    310      *         var i1 = board.create('input', [-3, 4, 'sin(x)', 'f(x)='], {cssStyle: 'width:4em', maxlength: 2});
    311      *         var c1 = board.create('checkbox', [-3, 2, 'label 1'], {});
    312      *         var b1 = board.create('button', [-3, -1, 'Change texts', function () {
    313      *                 i1.setText('g(x)');
    314      *                 i1.set('cos(x)');
    315      *                 c1.setText('label 2');
    316      *                 b1.setText('Texts are changed');
    317      *             }],
    318      *             {cssStyle: 'width:400px'});
    319      *
    320      * </pre><div id="JXG11cac8ff-2354-47e7-9da4-eb298e53de05" class="jxgbox" style="width: 300px; height: 300px;"></div>
    321      * <script type="text/javascript">
    322      *     (function() {
    323      *         var board = JXG.JSXGraph.initBoard('JXG11cac8ff-2354-47e7-9da4-eb298e53de05',
    324      *             {boundingbox: [-8, 8, 8,-8], axis: true, showcopyright: false, shownavigation: false});
    325      *             var i1 = board.create('input', [-3, 4, 'sin(x)', 'f(x)='], {cssStyle: 'width:4em', maxlength: 2});
    326      *             var c1 = board.create('checkbox', [-3, 2, 'label 1'], {});
    327      *             var b1 = board.create('button', [-3, -1, 'Change texts', function () {
    328      *                     i1.setText('g(x)');
    329      *                     i1.set('cos(x)');
    330      *                     c1.setText('label 2');
    331      *                     b1.setText('Texts are changed');
    332      *                 }],
    333      *                 {cssStyle: 'width:400px'});
    334      *
    335      *     })();
    336      *
    337      * </script><pre>
    338      *
    339      */
    340
    341      /**
    342      * @class
    343      * @ignore
    344      */
    345
    346     t.set = function (val) {
    347         this._value = val;
    348         this.rendNodeInput.value = val;
    349         return this;
    350     };
    351
    352     Env.addEvent(t.rendNodeInput, "input", priv.InputInputEventHandler, t);
    353     Env.addEvent(
    354         t.rendNodeInput,
    355         "mousedown",
    356         function (evt) {
    357             if (Type.exists(evt.stopPropagation)) {
    358                 evt.stopPropagation();
    359             }
    360         },
    361         t
    362     );
    363     Env.addEvent(
    364         t.rendNodeInput,
    365         "touchstart",
    366         function (evt) {
    367             if (Type.exists(evt.stopPropagation)) {
    368                 evt.stopPropagation();
    369             }
    370         },
    371         t
    372     );
    373     Env.addEvent(
    374         t.rendNodeInput,
    375         "pointerdown",
    376         function (evt) {
    377             if (Type.exists(evt.stopPropagation)) {
    378                 evt.stopPropagation();
    379             }
    380         },
    381         t
    382     );
    383
    384     // This sets the font-size of the input HTML element
    385     t.visPropOld.fontsize = "0px";
    386     board.renderer.updateTextStyle(t, false);
    387
    388     return t;
    389 };
    390
    391 JXG.registerElement("input", JXG.createInput);
    392
    393 // export default {
    394 //     createInput: JXG.createInput
    395 // };
    396