ant-design-vue
Version:
An enterprise-class UI design language and Vue-based implementation
189 lines • 6.81 kB
JavaScript
import { createVNode as _createVNode } from "vue";
import { createApp } from 'vue';
// We only handle element & text node.
var TEXT_NODE = 3;
var COMMENT_NODE = 8;
var ellipsisContainer;
var wrapperStyle = {
padding: 0,
margin: 0,
display: 'inline',
lineHeight: 'inherit'
};
function styleToString(style) {
// There are some different behavior between Firefox & Chrome.
// We have to handle this ourself.
var styleNames = Array.prototype.slice.apply(style);
return styleNames.map(function (name) {
return "".concat(name, ": ").concat(style.getPropertyValue(name), ";");
}).join('');
}
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.paddingTop = '0';
target.style.paddingBottom = '0';
target.style.borderTopWidth = '0';
target.style.borderBottomWidth = '0';
target.style.top = '-999999px';
target.style.zIndex = '-1000';
// clean up css overflow
target.style.textOverflow = 'clip';
target.style.whiteSpace = 'normal';
target.style.webkitLineClamp = 'none';
}
function getRealLineHeight(originElement) {
var heightContainer = document.createElement('div');
resetDomStyles(heightContainer, originElement);
heightContainer.appendChild(document.createTextNode('text'));
document.body.appendChild(heightContainer);
// The element real height is always less than multiple of line-height
// Use getBoundingClientRect to get actual single row height of the element
var realHeight = heightContainer.getBoundingClientRect().height;
document.body.removeChild(heightContainer);
return realHeight;
}
export default (function (originElement, option, content, fixedContent, ellipsisStr) {
if (!ellipsisContainer) {
ellipsisContainer = document.createElement('div');
ellipsisContainer.setAttribute('aria-hidden', 'true');
document.body.appendChild(ellipsisContainer);
}
var rows = option.rows,
_option$suffix = option.suffix,
suffix = _option$suffix === void 0 ? '' : _option$suffix;
var lineHeight = getRealLineHeight(originElement);
var maxHeight = Math.round(lineHeight * rows * 100) / 100;
resetDomStyles(ellipsisContainer, originElement);
// Render in the fake container
var vm = createApp({
render: function render() {
return _createVNode("div", {
"style": wrapperStyle
}, [_createVNode("span", {
"style": wrapperStyle
}, [content, suffix]), _createVNode("span", {
"style": wrapperStyle
}, [fixedContent])]);
}
});
vm.mount(ellipsisContainer);
// Check if ellipsis in measure div is height enough for content
function inRange() {
var currentHeight = Math.round(ellipsisContainer.getBoundingClientRect().height * 100) / 100;
return currentHeight - 0.1 <= maxHeight; // -.1 for firefox
}
// Skip ellipsis if already match
if (inRange()) {
vm.unmount();
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.unmount();
// ========================= 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,
vNode: fullText
} : {
finished: true,
vNode: currentStepText
};
}
}
}
if (inRange()) {
return measureText(textNode, fullText, midLoc, endLoc, midLoc);
}
return measureText(textNode, fullText, startLoc, midLoc, lastSuccessLoc);
}
function measureNode(childNode) {
var type = childNode.nodeType;
// console.log('type', type);
// 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,
// vNode: contentList[index],
// };
// }
// // Clean up if can not pull in
// ellipsisContentHolder.removeChild(childNode);
// return {
// finished: true,
// vNode: 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
return {
finished: false,
vNode: null
};
}
childNodes.some(function (childNode) {
var _measureNode = measureNode(childNode),
finished = _measureNode.finished,
vNode = _measureNode.vNode;
if (vNode) {
ellipsisChildren.push(vNode);
}
return finished;
});
return {
content: ellipsisChildren,
text: ellipsisContainer.innerHTML,
ellipsis: true
};
});