ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
111 lines • 12.1 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
/**
* fit content details: https://github.com/NG-ZORRO/ng-zorro-antd/pull/6154#issuecomment-745025554
*
* calc position x,y point
*
* CASE (width <= clientWidth && height <= clientHeight):
*
* ------------- clientWidth -------------
* | |
* | ------ width ------ |
* | | | |
* | | | |
* client height | |
* Height | | |
* | | | |
* | ------------------- |
* | |
* | |
* ---------------------------------------
* fixedPosition = { x: 0, y: 0 }
*
*
*
* CASE (width > clientWidth || height > clientHeight):
*
* ------------- clientWidth -------------
* | | |
* | top |
* | | |
* |--left--|--------------- width -----------------
* | | |
* client | |
* Height | |
* | | |
* | | |
* | height |
* | | |
* ---------| |
* | |
* | |
* | |
* ----------------------------------------
*
*
* - left || top > 0
* left -> 0 || top -> 0
*
* - (left + width) < clientWidth || (top + height) < clientHeight
* - left | top + width | height < clientWidth | clientHeight -> Back left | top + width | height === clientWidth | clientHeight
*
* DEFAULT:
* - hold position
*
*/
export function getFitContentPosition(params) {
let fixPos = {};
if (params.width <= params.clientWidth && params.height <= params.clientHeight) {
fixPos = {
x: 0,
y: 0
};
}
if (params.width > params.clientWidth || params.height > params.clientHeight) {
fixPos = {
x: fitPoint(params.left, params.width, params.clientWidth),
y: fitPoint(params.top, params.height, params.clientHeight)
};
}
return fixPos;
}
export function getOffset(node) {
const box = node.getBoundingClientRect();
const docElem = document.documentElement;
// use docElem.scrollLeft to support IE
return {
left: box.left + (window.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || document.body.clientLeft || 0),
top: box.top + (window.pageYOffset || docElem.scrollTop) - (docElem.clientTop || document.body.clientTop || 0)
};
}
export function getClientSize() {
const width = document.documentElement.clientWidth;
const height = window.innerHeight || document.documentElement.clientHeight;
return {
width,
height
};
}
function fitPoint(start, size, clientSize) {
const startAddSize = start + size;
const offsetStart = (size - clientSize) / 2;
let distance = null;
if (size > clientSize) {
if (start > 0) {
distance = offsetStart;
}
if (start < 0 && startAddSize < clientSize) {
distance = -offsetStart;
}
}
else {
if (start < 0 || startAddSize > clientSize) {
distance = start < 0 ? offsetStart : -offsetStart;
}
}
return distance;
}
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y?: number } {\n  let fixPos = {};\n\n  if (params.width <= params.clientWidth && params.height <= params.clientHeight) {\n    fixPos = {\n      x: 0,\n      y: 0\n    };\n  }\n\n  if (params.width > params.clientWidth || params.height > params.clientHeight) {\n    fixPos = {\n      x: fitPoint(params.left, params.width, params.clientWidth),\n      y: fitPoint(params.top, params.height, params.clientHeight)\n    };\n  }\n\n  return fixPos;\n}\n\nexport function getOffset(node: HTMLElement): { left: number; top: number } {\n  const box = node.getBoundingClientRect();\n  const docElem = document.documentElement;\n\n  // use docElem.scrollLeft to support IE\n  return {\n    left: box.left + (window.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || document.body.clientLeft || 0),\n    top: box.top + (window.pageYOffset || docElem.scrollTop) - (docElem.clientTop || document.body.clientTop || 0)\n  };\n}\n\nexport function getClientSize(): { width: number; height: number } {\n  const width = document.documentElement.clientWidth;\n  const height = window.innerHeight || document.documentElement.clientHeight;\n  return {\n    width,\n    height\n  };\n}\n\nfunction fitPoint(start: number, size: number, clientSize: number): number | null {\n  const startAddSize = start + size;\n  const offsetStart = (size - clientSize) / 2;\n  let distance: number | null = null;\n\n  if (size > clientSize) {\n    if (start > 0) {\n      distance = offsetStart;\n    }\n    if (start < 0 && startAddSize < clientSize) {\n      distance = -offsetStart;\n    }\n  } else {\n    if (start < 0 || startAddSize > clientSize) {\n      distance = start < 0 ? offsetStart : -offsetStart;\n    }\n  }\n\n  return distance;\n}\n"]}