Created
February 26, 2009 02:36
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javascript: | |
if (window.hah){ | |
hah.removeHints(); | |
} | |
window.hah = { | |
hintKeys : new String('asdfghjkl'), | |
selector: 'a[href]:not([href^="mailto:"]), input:not([type="hidden"]), textarea, select, img[onclick], button', | |
xpath: '//a[@href]|//input[not(@type=\x22hidden\x22)]|//textarea|//select|//img[@onclick]|//button', | |
xpathMode : true, | |
hintColorLink : '#FFFF00', | |
hintColorForm : '#00FFFF', | |
hintColorFocused : '#FF00FF', | |
keyMap : {'8': 'Bkspc', '46': 'Delete', '32': 'Space', '13':'Enter', '16': 'Shift', '17': 'Ctrl', '18': 'Alt'}, | |
hintKeysLength : null, | |
hintContainerId : 'hintContainer', | |
hintElements : [], | |
inputKey : '', | |
lastMatchHint : null, | |
k : 0, | |
rectFixForOpera : function (e, s) { | |
if (!window.opera || e.tagName.toLowerCase() != 'a' || s.cssFloat != 'none') return null; | |
var c = e.firstChild; | |
var cIsAfterWhiteSpace = true; | |
while (cIsAfterWhiteSpace) { | |
if (!c) return { | |
left: 0, | |
right: 0 | |
}; | |
cIsAfterWhiteSpace = (c.nodeName.toLowerCase() == 'br' || c.nodeType == 8 || c.nodeType == 3 && !/\S/.test(c.nodeValue)); | |
if (c instanceof HTMLImageElement || c.tagName && c.tagName.toLowerCase() != 'br' && getComputedStyle(c, null).display == 'block') return c.getBoundingClientRect(); | |
c = c.nextSibling; | |
} | |
return null; | |
}, | |
getAbsolutePosition : function (elem, html, body, inWidth, inHeight) { | |
var style = getComputedStyle(elem, null); | |
if (style.visibility === 'hidden' || style.opacity === '0') return false; | |
var rect = hah.rectFixForOpera(elem, style) || elem.getClientRects()[0]; | |
if (rect && rect.right - rect.left && rect.left >= 0 && rect.top >= -5 && rect.bottom <= inHeight + 5 && rect.right <= inWidth) { | |
return { | |
top: (body.scrollTop || html.scrollTop) - html.clientTop + rect.top, | |
left: (body.scrollLeft || html.scrollLeft) - html.clientLeft + rect.left | |
} | |
} | |
return false; | |
}, | |
createText : function (num) { | |
var text = ''; | |
var l = hah.hintKeysLength; | |
var iter = 0; | |
while (num >= 0) { | |
var n = num; | |
num -= Math.pow(l, 1 + iter++); | |
} | |
for (var i = 0; i < iter; i++) { | |
var r = n % l; | |
n = Math.floor(n / l); | |
text = hah.hintKeys.charAt(r) + text; | |
} | |
return text; | |
}, | |
getXPathElements : function(win){ | |
function resolv(p) { if (p == 'xhtml') return 'http://www.w3.org/1999/xhtml'; } | |
var result = win.document.evaluate(hah.xpath, win.document, resolv, 7, null); | |
for (var i = 0, arr = [], len = result.snapshotLength; i < len; i++){ | |
arr[i] = result.snapshotItem(i); | |
} | |
return arr; | |
}, | |
start : function(win){ | |
if (!hah) var hah = top.hah; | |
var html = win.document.documentElement; | |
var body = win.document.body; | |
var inWidth = win.innerWidth; | |
var inHeight = win.innerHeight; | |
var df = document.createDocumentFragment(); | |
var div = df.appendChild(document.createElement('div')); | |
div.id = hah.hintContainerId; | |
var elems = hah.xpathMode===true? | |
hah.getXPathElements(win) : | |
Array.prototype.slice.call(win.document.querySelectorAll(hah.selector)); | |
elems.forEach(function(elem){ | |
var pos = hah.getAbsolutePosition(elem, html, body, inWidth, inHeight); | |
if (pos === false) return; | |
var hint = hah.createText(hah.k); | |
var span = win.document.createElement('span'); | |
span.appendChild(document.createTextNode(hint)); | |
var st = span.style; | |
st.position = 'absolute'; | |
st.zIndex = '2147483647'; | |
st.color = '#000'; | |
st.backgroundColor = elem.hasAttribute('href') === true? hah.hintColorLink: hah.hintColorForm; | |
st.fontSize = '10pt'; | |
st.fontFamily = 'monospace'; | |
st.lineHeight = '10pt'; | |
st.padding = '0px'; | |
st.margin = '0px'; | |
st.textTransform = 'uppercase'; | |
st.opacity = '0.7'; | |
st.left = Math.max(0, pos.left - 8) + 'px'; | |
st.top = Math.max(0, pos.top - 8) + 'px'; | |
hah.hintElements[hint] = span; | |
span.element = elem; | |
div.appendChild(span); | |
hah.k++; | |
}); | |
win.document.addEventListener('keypress', this, true); | |
win.document.body.appendChild(df); | |
}, | |
end : function(win){ | |
if (!hah) var hah = top.hah; | |
var div = win.document.getElementById(hah.hintContainerId); | |
win.document.removeEventListener('keypress', this, true); | |
if (div){ | |
win.document.body.removeChild(div); | |
} | |
}, | |
drawHints : function(){ | |
var frame = window.frames; | |
if (!document.getElementsByTagName('frameset')[0]) | |
hah.start(window); | |
Array.prototype.forEach.call(frame, function(elem){ | |
try{ | |
hah.start(elem); | |
}catch(e){ | |
alert(e); | |
} | |
}) | |
}, | |
removeHints : function(){ | |
var frame = top.frames; | |
if (!document.getElementsByTagName('frameset')[0]) | |
hah.end(top); | |
Array.prototype.forEach.call(frame, function(elem){ | |
try{ | |
hah.end(elem); | |
}catch(e){ | |
} | |
}) | |
}, | |
blurHint : function(){ | |
if (hah.lastMatchHint){ | |
hah.lastMatchHint.style.backgroundColor = hah.lastMatchHint.element.hasAttribute('href')===true? | |
hah.hintColorLink: hah.hintColorForm; | |
} | |
}, | |
resetInput : function(){ | |
hah.inputKey =''; | |
hah.blurHint(); | |
hah.lastMatchHint = null; | |
}, | |
handleEvent : function(event){ | |
var key = event.keyCode || event.charCode; | |
if (key in hah.keyMap === false){ | |
hah.removeHints(); | |
return; | |
} | |
var onkey = hah.keyMap[key]; | |
switch(onkey){ | |
case 'Enter': | |
hah.lastMatchHint.element.hasAttribute('href')===true? | |
hah.resetInput(): | |
hah.removeHints(); | |
case 'Shift': | |
case 'Ctrl': | |
case 'Alt': return; | |
} | |
event.preventDefault(); | |
event.stopPropagation(); | |
switch(onkey){ | |
case 'Bkspc' : | |
case 'Delete' : | |
if (!hah.inputKey){ | |
hah.removeHints(); | |
return; | |
} | |
hah.resetInput(); | |
return; | |
case 'Space': | |
hah.removeHints(); | |
return; | |
default : | |
hah.inputKey += onkey; | |
}; | |
hah.blurHint(); | |
if (hah.inputKey in hah.hintElements === false){ | |
hah.resetInput(); | |
hah.inputKey += onkey; | |
} | |
hah.lastMatchHint = hah.hintElements[hah.inputKey]; | |
hah.lastMatchHint.style.backgroundColor = hah.hintColorFocused; | |
hah.lastMatchHint.element.focus(); | |
}, | |
init : function(){ | |
hah.hintKeysLength = hah.hintKeys.length; | |
hah.hintKeys.split('').forEach(function(l) { hah.keyMap[l.charCodeAt(0)] = l; }); | |
if (hah.xpathMode === true){ | |
hah.xpath += '|' + hah.xpath.replace(/\/\//g, '//xhtml:'); | |
} | |
}, | |
}; | |
hah.init(); | |
hah.drawHints(); |
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