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Extract common helper methods into shared.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| // Shared helper | ||
| // Gary Kacmarcik - garykac@{gmail|google}.com | ||
|
|
||
| function clearChildren(e) { | ||
| while (e.firstChild !== null) { | ||
| e.removeChild(e.firstChild); | ||
| } | ||
| } | ||
|
|
||
| function setText(e, text) { | ||
| clearChildren(e); | ||
| e.appendChild(document.createTextNode(text)); | ||
| } | ||
|
|
||
| function addEventListener(obj, etype, handler) { | ||
| if (obj.addEventListener) { | ||
| obj.addEventListener(etype, handler, false); | ||
| } else if (obj.attachEvent) { | ||
| obj.attachEvent("on" + etype, handler); | ||
| } else { | ||
| obj["on" + etype] = handler; | ||
| } | ||
| } | ||
|
|
||
| function handleDefaultPropagation(etype, e) { | ||
| var preventDefault = document.getElementById("pd_" + etype); | ||
| console.log("preventDefault for " + etype + " "); | ||
| console.log(preventDefault); | ||
| if (preventDefault.checked && e.preventDefault) { | ||
| e.preventDefault(); | ||
| } | ||
| var stopPropagation = document.getElementById("sp_" + etype); | ||
| if (stopPropagation.checked && e.stopPropagation) { | ||
| e.stopPropagation(); | ||
| } | ||
| // Always prevent default for Tab. | ||
| if (e.keyCode == 9 || e.code == "Tab") { | ||
| e.preventDefault(); | ||
| } | ||
| } | ||
|
|
||
| function getModifierState(e) { | ||
| Modifiers = [ | ||
| "Alt", "AltGraph", "Control", "Shift", "Meta", | ||
| // Locking keys | ||
| "CapsLock", "NumLock", "ScrollLock", | ||
| // Linux | ||
| "Hyper", "Super", | ||
| // Virtual keyboards | ||
| "Symbol", "SymbolLock", | ||
| // Not valid, but check anyway | ||
| "Fn", "FnLock", | ||
| ]; | ||
|
|
||
| // Safari doesn't define getModifierState for mouse events. | ||
| if (e.getModifierState === undefined) { | ||
| return "Undefined"; | ||
| } | ||
|
|
||
| mods = undefined; | ||
| for (var mod of Modifiers) { | ||
| if (e.getModifierState(mod)) { | ||
| if (!mods) { | ||
| mods = mod; | ||
| } else { | ||
| mods += ", " + mod; | ||
| } | ||
| } | ||
| } | ||
| return mods; | ||
| } | ||
|
|
||
| function getEventPhase(e) { | ||
| var p = e.eventPhase; | ||
| var phase = '?'; | ||
| if (p == 0) | ||
| phase = 'None'; | ||
| else if (p == 1) | ||
| phase = 'Capturing'; | ||
| else if (p == 2) | ||
| phase = 'AtTarget'; | ||
| else if (p == 3) | ||
| phase = 'Bubbling'; | ||
| return phase; | ||
| } | ||
|
|
||
| function calcString(data) { | ||
| if (data === undefined) { | ||
| return data; | ||
| } | ||
| return "'" + data + "'"; | ||
| } |