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annotate sat_templates/templates/default/static/dom_update.js @ 172:4a03d0a6839b

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css (styles): various styles improvments: - work on list - new paired-slides class - box-medium is a larger than before - use --text modified when size is 1em - added several list modifiers classes - added several box modifiers
author Goffi <goffi@goffi.org>
date Sat, 26 Jan 2019 20:22:18 +0100
parents 178f55b825b7
children
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rev   line source
166
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1 /* This script check for well-known DOM element to modify when javascript is enabled */
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2
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3 const EXPAND_LIMIT = 250; // max height before expanding is needed, in pixels
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4 const MAGIC_CLASSES = {
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5 "box--expand": "handleBoxExpand"};
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6
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7
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8 function addExpandListeners(elt, expand_elt, reduce_elt) {
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9 let on_click = function(){
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10 clicked_mh_fix(elt);
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11 };
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12 expand_elt.addEventListener('click', on_click, false);
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13 reduce_elt.addEventListener('click', on_click, false);
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14 }
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15
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16 function handleBoxExpand(box_elt) {
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17 /* Add expand zone elements if box height is > EXPAND_LIMIT
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18 *
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19 * Those zone will expand/reduce the box when clicked
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20 * @param box_elt(DOM element): element with box--expand class
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21 */
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22 let content_elt = box_elt.getElementsByClassName("box__content")[0];
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23
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24 if (content_elt === undefined) {
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25 return;
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26 }
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27
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28 if (content_elt.offsetHeight > EXPAND_LIMIT) {
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29 /* top expand box */
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30 let reduce_elt = document.createElement("div");
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31 reduce_elt.className = "box__expand_zone box__expand_zone--top show_if_parent_clicked";
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32 let p_elt = document.createElement("p");
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33 p_elt.textContent = reduce_txt;
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34 reduce_elt.appendChild(p_elt);
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35 box_elt.insertBefore(reduce_elt, box_elt.firstChild);
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36
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37 /* bottom expand box */
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38 let expand_elt = document.createElement("div");
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39 expand_elt.className = "box__expand_zone box__expand_zone--bottom";
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40 let p_elt_clicked = document.createElement("p");
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41 p_elt_clicked.textContent = expand_txt;
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42 p_elt_clicked.className = "show_if_grandparent_not_clicked";
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43 let p_elt_not_clicked = document.createElement("p");
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44 p_elt_not_clicked.textContent = reduce_txt;
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45 p_elt_not_clicked.className = "show_if_grandparent_clicked";
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46 expand_elt.appendChild(p_elt_clicked);
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47 expand_elt.appendChild(p_elt_not_clicked);
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48 box_elt.appendChild(expand_elt);
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49
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50 addExpandListeners(box_elt, expand_elt, reduce_elt);
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51 }
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52 }
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54
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55 function handleStateInit(elt) {
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56 /* Add a click listener which remove state_init
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57 *
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58 * The listener will call magic classes handlers when suitable
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59 * @param elt(DOM element): element with state_init class
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60 */
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61 function onClick() {
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62 elt.removeEventListener('click', onClick, false);
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63 elt.classList.remove("state_init");
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64
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65 for (let [className, funcName] of Object.entries(MAGIC_CLASSES)){
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66 if (elt.classList.contains(className)) {
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67 window[funcName](elt);
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68 }
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69 }
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70 }
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71 elt.addEventListener('click', onClick, false);
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72 }
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73
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74 // we first have to handle "state_init"
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75 for (let elt of document.getElementsByClassName("state_init")) {
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76 handleStateInit(elt);
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77 }
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78
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79 // we then launch every handler where "state_init" is not set
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80 // "state_init" handler will launch the handlers itself on first click
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81 for (let [className, funcName] of Object.entries(MAGIC_CLASSES)){
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82 for (let box_elt of document.getElementsByClassName(className)) {
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83 if (!box_elt.classList.contains("state_init")) {
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84 window[funcName](box_elt);
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85 }
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86 }
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87 }