element.clientHeight,
lineHeight = getLineHeight(element);
return Math.max(Math.floor(availHeight / lineHeight), 0);
}
/**
* Returns the maximum height a given element should have based on the line-
* height of the text and the given clamp value.
*/
function getMaxHeight(clmp) {
var lineHeight = getLineHeight(element);
return lineHeight * clmp;
}
/**
* Returns the line-height of an element as an integer.
*/
function getLineHeight(elem) {
var lh = computeStyle(elem, 'line-height');
if (lh == 'normal') {
// Normal line heights vary from browser to browser. The spec recommends
// a value between 1.0 and 1.2 of the font size. Using 1.1 to split the diff.
lh = parseInt(computeStyle(elem, 'font-size')) * 1.2;
}
return parseInt(lh);
}
// MEAT AND POTATOES (MMMM, POTATOES...) ______________________________________
var splitOnChars = opt.splitOnChars.slice(0),
splitChar = splitOnChars[0],
chunks,
lastChunk;
/**
* Gets an element's last child. That may be another node or a node's contents.
*/
function getLastChild(elem) {
//Current element has children, need to go deeper and get last child as a text node
if (elem.lastChild.children && elem.lastChild.children.length > 0) {
return getLastChild(Array.prototype.slice.call(elem.children).pop());
}
//This is the absolute last child, a text node, but something's wrong with it. Remove it and keep trying
else if (!elem.lastChild
关键词：通过封装一个v-clamp的指令处理多行文本的溢出