127 lines
3.9 KiB
JavaScript
127 lines
3.9 KiB
JavaScript
import computed from 'ember-addons/ember-computed-decorators';
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import { selectedText } from 'discourse/lib/utilities';
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// we don't want to deselect when we click on buttons that use it
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function willQuote(e) {
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const $target = $(e.target);
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return $target.hasClass('quote-button') || $target.closest('.create, .share, .reply-new').length;
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}
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export default Ember.Component.extend({
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classNames: ['quote-button'],
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classNameBindings: ['visible'],
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@computed('quoteState.buffer')
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visible: buffer => buffer && buffer.length > 0,
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_isMouseDown: false,
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_reselected: false,
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_selectionChanged() {
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const selection = window.getSelection();
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if (selection.isCollapsed) {
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if (this.get("visible")) this.sendAction("deselectText");
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return;
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}
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// ensure we selected content inside 1 post *only*
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let firstRange, postId;
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for (let r = 0; r < selection.rangeCount; r++) {
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const range = selection.getRangeAt(r);
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const $ancestor = $(range.commonAncestorContainer);
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firstRange = firstRange || range;
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postId = postId || $ancestor.closest('.boxed, .reply').data('post-id');
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if ($ancestor.closest(".contents").length === 0 || !postId) {
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if (this.get("visible")) this.sendAction("deselectText");
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return;
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}
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}
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this.get("quoteState").setProperties({ postId, buffer: selectedText() });
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// on Desktop, shows the button at the beginning of the selection
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// on Mobile, shows the button at the end of the selection
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const isMobileDevice = this.site.isMobileDevice;
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const { isIOS, isAndroid, isSafari } = this.capabilities;
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const showAtEnd = isMobileDevice || isIOS || isAndroid;
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// used to work around Safari losing selection
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const clone = firstRange.cloneRange();
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// create a marker element containing a single invisible character
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const markerElement = document.createElement("span");
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markerElement.appendChild(document.createTextNode("\ufeff"));
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// on mobile, collapse the range at the end of the selection
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if (showAtEnd) { firstRange.collapse(); }
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// insert the marker
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firstRange.insertNode(markerElement);
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// retrieve the position of the marker
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const $markerElement = $(markerElement);
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const markerOffset = $markerElement.offset();
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const parentScrollLeft = $markerElement.parent().scrollLeft();
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const $quoteButton = this.$();
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// remove the marker
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markerElement.parentNode.removeChild(markerElement);
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// work around Safari that would sometimes lose the selection
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if (isSafari) {
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this._reselected = true;
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selection.removeAllRanges();
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selection.addRange(clone);
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}
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// change the position of the button
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Ember.run.scheduleOnce("afterRender", () => {
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let top = markerOffset.top;
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let left = markerOffset.left + Math.max(0, parentScrollLeft);
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if (showAtEnd) {
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top = top + 20;
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left = Math.min(left + 10, $(window).width() - $quoteButton.outerWidth());
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} else {
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top = top - $quoteButton.outerHeight() - 5;
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}
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$quoteButton.offset({ top, left });
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});
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},
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didInsertElement() {
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const { isWinphone, isAndroid } = this.capabilities;
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const wait = (isWinphone || isAndroid) ? 250 : 25;
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const onSelectionChanged = _.debounce(() => this._selectionChanged(), wait);
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$(document).on("mousedown.quote-button", (e) => {
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this._isMouseDown = true;
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this._reselected = false;
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if (!willQuote(e)) {
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this.sendAction("deselectText");
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}
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}).on("mouseup.quote-button", () => {
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this._isMouseDown = false;
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onSelectionChanged();
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}).on("selectionchange.quote-button", () => {
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if (!this._isMouseDown && !this._reselected) {
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onSelectionChanged();
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}
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});
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},
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willDestroyElement() {
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$(document).off("mousedown.quote-button")
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.off("mouseup.quote-button")
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.off("selectionchange.quote-button");
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},
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click() {
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this.sendAction("selectText");
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return false;
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}
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});
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