redoc/lib/services/clipboard.service.ts

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'use strict';
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var isSupported = document.queryCommandSupported && document.queryCommandSupported('copy');
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export class Clipboard {
static isSupported():boolean {
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return isSupported;
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}
static selectElement(element:any):void {
let range;
let selection;
if ((<any>document.body).createTextRange) {
range = (<any>document.body).createTextRange();
range.moveToElementText(element);
range.select();
} else if (document.createRange && window.getSelection) {
selection = window.getSelection();
range = document.createRange();
range.selectNodeContents(element);
selection.removeAllRanges();
selection.addRange(range);
}
}
static deselect():void {
if ( (<any>document).selection ) {
(<any>document).selection.empty();
} else if ( window.getSelection ) {
window.getSelection().removeAllRanges();
}
}
static copySelected():boolean {
let result;
try {
result = document.execCommand('copy');
} catch (err) {
result = false;
}
return result;
}
static copyElement(element:any):boolean {
Clipboard.selectElement(element);
let res = Clipboard.copySelected();
if (res) Clipboard.deselect();
return res;
}
static copyCustom(text:string):boolean {
let textArea = document.createElement('textarea');
textArea.style.position = 'fixed';
textArea.style.top = '0';
textArea.style.left = '0';
// Ensure it has a small width and height. Setting to 1px / 1em
// doesn't work as this gives a negative w/h on some browsers.
textArea.style.width = '2em';
textArea.style.height = '2em';
// We don't need padding, reducing the size if it does flash render.
textArea.style.padding = '0';
// Clean up any borders.
textArea.style.border = 'none';
textArea.style.outline = 'none';
textArea.style.boxShadow = 'none';
// Avoid flash of white box if rendered for any reason.
textArea.style.background = 'transparent';
textArea.value = text;
document.body.appendChild(textArea);
textArea.select();
let res = Clipboard.copySelected();
document.body.removeChild(textArea);
return res;
}
}