318 lines
7.7 KiB
JavaScript
318 lines
7.7 KiB
JavaScript
(function HintNavigation() {
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var hint_num_str = '';
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var hint_elems = [];
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var hint_tags = [];
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var hint_enabled = false;
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var registeredElements = [];
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var keyId = {
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"U+0008" : "Backspace",
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"U+0009" : "Tab",
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"U+0018" : "Cancel",
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"U+001B" : "Esc",
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"U+0020" : "Space",
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"U+0021" : "!",
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"U+0023" : "#",
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"U+0024" : "$",
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"U+0029" : ")",
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"U+002A" : "*",
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"U+002B" : "+",
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"U+002C" : ",",
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"U+002E" : ".",
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"U+002F" : "/",
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"U+00C0" : "0",
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"U+0026" : "1",
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"U+00C9" : "2",
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"U+0022" : "3",
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"U+0027" : "4",
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"U+0028" : "5",
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"U+002D" : "6",
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"U+00C8" : "7",
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"U+005F" : "8",
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"U+00C7" : "9",
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"U+003A" : ":",
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"U+003B" : ";",
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"U+003C" : "<",
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"U+003D" : "=",
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"U+003E" : ">",
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"U+003F" : "?",
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"U+0040" : "@",
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"U+0041" : "a",
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"U+0042" : "b",
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"U+0043" : "c",
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"U+0044" : "d",
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"U+0045" : "e",
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"U+0046" : "f",
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"U+0047" : "g",
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"U+0048" : "h",
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"U+0049" : "i",
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"U+004A" : "j",
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"U+004B" : "k",
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"U+004C" : "l",
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"U+004D" : "m",
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"U+004E" : "n",
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"U+004F" : "o",
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"U+0050" : "p",
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"U+0051" : "q",
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"U+0052" : "r",
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"U+0053" : "s",
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"U+0054" : "t",
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"U+0055" : "u",
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"U+0056" : "v",
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"U+0057" : "w",
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"U+0058" : "x",
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"U+0059" : "y",
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"U+005A" : "z",
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"U+00DB" : "[",
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"U+00DC" : "\\",
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"U+00DD" : "]",
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"U+005E" : "^",
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"U+0060" : "`",
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"U+007B" : "{",
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"U+007C" : "|",
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"U+007D" : "}",
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"U+007F" : "Delete",
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"U+00A1" : "¡",
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"U+0300" : "CombGrave",
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"U+0301" : "CombAcute",
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"U+0302" : "CombCircum",
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"U+0303" : "CombTilde",
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"U+0304" : "CombMacron",
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"U+0306" : "CombBreve",
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"U+0307" : "CombDot",
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"U+0308" : "CombDiaer",
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"U+030A" : "CombRing",
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"U+030B" : "CombDblAcute",
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"U+030C" : "CombCaron",
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"U+0327" : "CombCedilla",
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"U+0328" : "CombOgonek",
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"U+0345" : "CombYpogeg",
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"U+20AC" : "€",
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"U+3099" : "CombVoice",
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"U+309A" : "CombSVoice",
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};
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function interceptListeners(element) {
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var addEvent = element.prototype.addEventListener;
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var removeEvent = element.prototype.removeEventListener;
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element.prototype.addEventListener = function () {
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if (arguments[0] === "click" || arguments[0] === "mouseover") {
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registeredElements.push(this);
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}
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addEvent.call(this, arguments[0], arguments[1], arguments[2]);
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};
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element.prototype.removeEventListener = function () {
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if ((arguments[0] === "click" || arguments[1] === "mouseover") && registeredElements.indexOf(this)>= 0 ) {
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registeredElements.splice(registeredElements.indexOf(this), 1);
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}
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removeEvent.call(this, arguments[0], arguments[1], arguments[2]);
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};
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}
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function start(){
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hint_enabled = true;
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setHints();
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document.removeEventListener('keydown', initKeyBind, false);
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document.addEventListener('keydown', hintHandler, false);
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document.addEventListener('scroll', windowChanged, false);
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document.addEventListener('resize', windowChanged, false);
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hint_num_str = '';
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}
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function hintHandler(e){
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e.preventDefault(); //Stop Default Event
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var pressedKey = get_key(e);
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var hint_num;
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if (pressedKey !== 'U+0000') {
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if (pressedKey === 'Backspace') {
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if (hint_num_str.length > 0) {
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hint_num_str = hint_num_str.substr(0,hint_num_str.length - 1);
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}
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}
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else if (pressedKey === 'Enter') {
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if (hint_num_str === '') {
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hint_num_str = '1';
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}
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judgeHintNum(Number(hint_num_str));
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return;
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}
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else if (/[0-9]/.test(pressedKey) === false) {
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stop();
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}
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else if (Number(hint_num_str + pressedKey) <= hint_elems.length) {
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hint_num_str += pressedKey;
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hint_num = Number(hint_num_str);
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if (hint_num * 10 > hint_elems.length + 1) {
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judgeHintNum(hint_num);
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return;
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}
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}
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for (var i = 1 ; i <= hint_tags.length ; ++i ) {
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var iStr = i.toString();
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if (iStr === hint_num_str) {
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hint_tags[i - 1].style.display = 'inline';
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hint_tags[i - 1].style.border = 'solid 6px blue';
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}
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else if (iStr.length > hint_num_str.length && iStr.substr(0,hint_num_str.length) === hint_num_str) {
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hint_tags[i - 1].style.display = 'inline';
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hint_tags[i - 1].style.border = 'none';
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}
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else {
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hint_tags[i - 1].style.display = 'none';
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hint_tags[i - 1].style.border = 'none';
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}
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}
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}
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}
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function judgeHintNum(hint_num) {
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var hint_elem = hint_elems[hint_num - 1];
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if (hint_elem) {
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execSelect(hint_elem);
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} else {
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stop();
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}
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}
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function execSelect(elem) {
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var tag_name = elem.tagName.toLowerCase();
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var type = elem.type ? elem.type.toLowerCase() : '';
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elem.dispatchEvent(new Event('mouseover'));
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elem.dispatchEvent(new Event('click', {
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'bubbles': true,
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'cancelable': true}));
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if (tag_name === 'input' && (type === "radio" || type === "checkbox")) {
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elem.checked = !elem.checked;
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}
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else if (tag_name === 'input' || tag_name === 'textarea') {
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elem.focus();
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elem.setSelectionRange(0, elem.value.length);
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}
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stop();
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}
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function setHints() {
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var win_top = window.pageYOffset;
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var win_bottom = win_top + window.innerHeight;
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var win_left = window.pageXOffset;
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var elems = document.body.querySelectorAll('a, input:not([type=hidden]), textarea, select, button, [onclick], [onmouseover], [for]');
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var elements = [];
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for (var i = 0 ; i < elems.length ; ++i) {
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elements.push(elems[i]);
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}
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for (i = 0 ; i < registeredElements.length ; ++i) {
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elements.push(registeredElements[i]);
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}
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var div = document.createElement('div');
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div.setAttribute('highlight', 'hints');
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document.body.appendChild(div);
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for (i = 0; i < elements.length; i++) {
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var elem = elements[i];
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if (!isHintDisplay(elem)) {
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continue;
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}
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var pos = elem.getBoundingClientRect();
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var elem_top = win_top + pos.top;
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var elem_bottom = win_top + pos.bottom;
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var elem_left = win_left + pos.left;
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if ( elem_bottom >= win_top && elem_top <= win_bottom) {
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hint_elems.push(elem);
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var span = document.createElement('span');
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span.style.cssText = [
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'left: ', elem_left, 'px;',
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'top: ', elem_top, 'px;',
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'position: absolute;',
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'font-size: 13px;',
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'background-color: red;',
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'color: white;',
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'font-weight: bold;',
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'padding: 0px 1px;',
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'z-index: 10000;'
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].join('');
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span.innerHTML = hint_elems.length;
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div.appendChild(span);
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hint_tags.push(span);
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}
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}
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}
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function isHintDisplay(elem) {
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var pos = elem.getBoundingClientRect();
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return (pos.height !== 0 && pos.width !== 0);
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}
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function stop() {
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if (!hint_enabled){
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return;
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}
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hint_enabled = false;
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hint_elems = [];
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hint_tags = [];
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hint_num_str = '';
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var div = document.body.querySelector('div[highlight=hints]');
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if (div) {
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document.body.removeChild(div);
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}
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document.removeEventListener('keydown', hintHandler, false);
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document.removeEventListener('scroll', windowChanged, false);
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document.removeEventListener('resize', windowChanged, false);
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document.addEventListener('keydown', initKeyBind, false);
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if (refreshTimeout) {
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window.clearTimeout(refreshTimeout);
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}
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}
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function initKeyBind(e){
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if (e.target.nodeType === 1 && e.ctrlKey){
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if (get_key(e) === 'f') {
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e.preventDefault();
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start();
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}
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else if (get_key(e) === 'c') {
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e.preventDefault();
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stop();
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}
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}
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}
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var refreshTimeout;
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function windowChanged(){
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if (refreshTimeout) {
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window.clearTimeout(refreshTimeout);
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}
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refreshTimeout = window.setTimeout(refreshHints, 200);
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}
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function refreshHints() {
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stop();
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start();
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refreshTimeout = undefined;
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}
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function get_key(evt){
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return keyId[evt.keyIdentifier] || evt.keyIdentifier;
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}
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interceptListeners(HTMLElement);
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document.addEventListener( 'keydown', initKeyBind, false );
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})(); |