iep-ui
Version:
An enterprise-class UI design language and Vue-based implementation
235 lines (204 loc) • 7.13 kB
JavaScript
import Vue from 'vue';
var TEXT_NODE = 3;
var COMMENT_NODE = 8;
var ellipsisContainer = void 0;
var wrapperStyle = {
padding: 0,
margin: 0,
display: 'inline',
lineHeight: 'inherit'
};
export function pxToNumber(value) {
if (!value) {
return 0;
}
var match = value.match(/^\d*(\.\d*)?/);
return match ? Number(match[0]) : 0;
}
export function styleToString(style) {
var styleNames = Array.prototype.slice.apply(style);
return styleNames.map(function (name) {
return name + ': ' + style.getPropertyValue(name) + ';';
}).join('');
}
export function mergeChildren(children) {
var childList = [];
children.forEach(function (child) {
var prevChild = childList[childList.length - 1];
if (typeof child === 'string' && typeof prevChild === 'string') {
childList[childList.length - 1] += child;
} else {
childList.push(child);
}
});
return childList;
}
export var resetDomStyles = function resetDomStyles(target, origin) {
target.setAttribute('aria-hidden', 'true');
var originStyle = window.getComputedStyle(origin);
var originCSS = styleToString(originStyle);
// Set shadow
target.setAttribute('style', originCSS);
target.style.position = 'fixed';
target.style.left = '0';
target.style.height = 'auto';
target.style.minHeight = 'auto';
target.style.maxHeight = 'auto';
target.style.top = '-999999px';
target.style.zIndex = '-1000';
// clean up css overflow
target.style.textOverflow = 'clip';
target.style.whiteSpace = 'normal';
target.style.webkitLineClamp = 'none';
};
export function getRealLineHeight(originElement) {
var heightContainer = document.createElement('div');
resetDomStyles(heightContainer, originElement);
heightContainer.appendChild(document.createTextNode('text'));
document.body.appendChild(heightContainer);
var offsetHeight = heightContainer.offsetHeight;
var lineHeight = pxToNumber(window.getComputedStyle(originElement).lineHeight);
document.body.removeChild(heightContainer);
return offsetHeight > lineHeight ? offsetHeight : lineHeight;
}
export default (function (originElement, option, content, fixedContent, ellipsisStr) {
if (!ellipsisContainer) {
ellipsisContainer = document.createElement('div');
ellipsisContainer.setAttribute('aria-hidden', 'true');
}
if (!ellipsisContainer.parentNode) {
document.body.appendChild(ellipsisContainer);
}
var rows = option.rows,
_option$suffix = option.suffix,
suffix = _option$suffix === undefined ? '' : _option$suffix;
// Get origin style
var originStyle = window.getComputedStyle(originElement);
var lineHeight = getRealLineHeight(originElement);
var maxHeight = Math.floor(lineHeight) * (rows + 1) + pxToNumber(originStyle.paddingTop) + pxToNumber(originStyle.paddingBottom);
resetDomStyles(ellipsisContainer, originElement);
var vm = new Vue({
render: function render() {
var h = arguments[0];
return h(
'div',
{ style: wrapperStyle },
[h(
'span',
{ style: wrapperStyle },
[content, suffix]
), h(
'span',
{ style: wrapperStyle },
[fixedContent]
)]
);
}
});
vm.$mount(ellipsisContainer);
function inRange() {
return Math.ceil(ellipsisContainer.getBoundingClientRect().height) < maxHeight;
}
if (inRange()) {
vm.$destroy();
return { content: content, text: ellipsisContainer.innerHTML, ellipsis: false };
}
var childNodes = Array.prototype.slice.apply(ellipsisContainer.childNodes[0].childNodes[0].cloneNode(true).childNodes).filter(function (_ref) {
var nodeType = _ref.nodeType,
data = _ref.data;
return nodeType !== COMMENT_NODE && data !== '';
});
var fixedNodes = Array.prototype.slice.apply(ellipsisContainer.childNodes[0].childNodes[1].cloneNode(true).childNodes);
vm.$destroy();
// ========================= Find match ellipsis content =========================
var ellipsisChildren = [];
ellipsisContainer.innerHTML = '';
// Create origin content holder
var ellipsisContentHolder = document.createElement('span');
ellipsisContainer.appendChild(ellipsisContentHolder);
var ellipsisTextNode = document.createTextNode(ellipsisStr + suffix);
ellipsisContentHolder.appendChild(ellipsisTextNode);
fixedNodes.forEach(function (childNode) {
ellipsisContainer.appendChild(childNode);
});
// Append before fixed nodes
function appendChildNode(node) {
ellipsisContentHolder.insertBefore(node, ellipsisTextNode);
}
// Get maximum text
function measureText(textNode, fullText) {
var startLoc = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
var endLoc = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : fullText.length;
var lastSuccessLoc = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 0;
var midLoc = Math.floor((startLoc + endLoc) / 2);
var currentText = fullText.slice(0, midLoc);
textNode.textContent = currentText;
if (startLoc >= endLoc - 1) {
// Loop when step is small
for (var step = endLoc; step >= startLoc; step -= 1) {
var currentStepText = fullText.slice(0, step);
textNode.textContent = currentStepText;
if (inRange() || !currentStepText) {
return step === fullText.length ? {
finished: false,
reactNode: fullText
} : {
finished: true,
reactNode: currentStepText
};
}
}
}
if (inRange()) {
return measureText(textNode, fullText, midLoc, endLoc, midLoc);
}
return measureText(textNode, fullText, startLoc, midLoc, lastSuccessLoc);
}
function measureNode(childNode) {
var type = childNode.nodeType;
// if (type === ELEMENT_NODE) {
// // We don't split element, it will keep if whole element can be displayed.
// appendChildNode(childNode);
// if (inRange()) {
// return {
// finished: false,
// reactNode: contentList[index],
// };
// }
//
// // Clean up if can not pull in
// ellipsisContentHolder.removeChild(childNode);
// return {
// finished: true,
// reactNode: null,
// };
// }
if (type === TEXT_NODE) {
var fullText = childNode.textContent || '';
var textNode = document.createTextNode(fullText);
appendChildNode(textNode);
return measureText(textNode, fullText);
}
// Not handle other type of content
// PS: This code should not be attached after react 16
/* istanbul ignore next */
return {
finished: false,
reactNode: null
};
}
childNodes.some(function (childNode, index) {
var _measureNode = measureNode(childNode, index),
finished = _measureNode.finished,
reactNode = _measureNode.reactNode;
if (reactNode) {
ellipsisChildren.push(reactNode);
}
return finished;
});
return {
content: ellipsisChildren,
text: ellipsisContainer.innerHTML,
ellipsis: true
};
});