mirror of
https://github.com/discourse/discourse.git
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354 lines
9.7 KiB
JavaScript
354 lines
9.7 KiB
JavaScript
import { on } from "ember-addons/ember-computed-decorators";
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export default Ember.Mixin.create({
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init() {
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this._super(...arguments);
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this._previousScrollParentOverflow = null;
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this._previousCSSContext = null;
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this.selectionSelector = ".choice";
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this.filterInputSelector = ".filter-input";
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this.rowSelector = ".select-kit-row";
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this.collectionSelector = ".select-kit-collection";
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this.headerSelector = ".select-kit-header";
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this.bodySelector = ".select-kit-body";
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this.wrapperSelector = ".select-kit-wrapper";
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this.scrollableParentSelector = ".modal-body";
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this.fixedPlaceholderSelector = `.select-kit-fixed-placeholder-${this.elementId}`;
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},
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$findRowByValue(value) {
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return $(
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this.element.querySelector(`${this.rowSelector}[data-value='${value}']`)
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);
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},
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$header() {
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return $(this.element && this.element.querySelector(this.headerSelector));
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},
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$body() {
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return $(this.element && this.element.querySelector(this.bodySelector));
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},
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$wrapper() {
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return $(this.element && this.element.querySelector(this.wrapperSelector));
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},
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$collection() {
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return $(
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this.element && this.element.querySelector(this.collectionSelector)
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);
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},
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$scrollableParent() {
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return $(this.scrollableParentSelector);
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},
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$fixedPlaceholder() {
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return $(this.fixedPlaceholderSelector);
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},
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$rows() {
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return this.$(`${this.rowSelector}:not(.no-content):not(.is-hidden)`);
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},
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$highlightedRow() {
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return this.$rows().filter(".is-highlighted");
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},
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$selectedRow() {
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return this.$rows().filter(".is-selected");
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},
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$filterInput() {
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return $(
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this.element && this.element.querySelector(this.filterInputSelector)
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);
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},
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_adjustPosition() {
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this._applyDirection();
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this._applyFixedPosition();
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this._positionWrapper();
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},
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@on("willDestroyElement")
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_clearState() {
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this.$fixedPlaceholder().remove();
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},
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// use to collapse and remove focus
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close(event) {
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this.setProperties({ isFocused: false });
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this.collapse(event);
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},
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focus() {
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this.focusFilterOrHeader();
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},
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// try to focus filter and fallback to header if not present
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focusFilterOrHeader() {
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const context = this;
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// next so we are sure it finised expand/collapse
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Ember.run.next(() => {
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Ember.run.schedule("afterRender", () => {
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if (
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!context.$filterInput() ||
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!context.$filterInput().is(":visible") ||
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context
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.$filterInput()
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.parent()
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.hasClass("is-hidden")
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) {
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if (context.$header()) {
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context.$header().focus();
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} else {
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$(context.element).focus();
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}
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} else {
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if (this.site && this.site.isMobileDevice) {
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this.expand();
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} else {
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context.$filterInput().focus();
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}
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}
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});
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});
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},
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expand() {
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if (this.isExpanded) return;
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this.setProperties({
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isExpanded: true,
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renderedBodyOnce: true,
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isFocused: true
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});
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this.focusFilterOrHeader();
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this.autoHighlight();
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Ember.run.next(() => {
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this._boundaryActionHandler("onExpand", this);
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Ember.run.schedule("afterRender", () => {
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if (!this.isDestroying && !this.isDestroyed) {
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this._adjustPosition();
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}
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});
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});
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},
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collapse() {
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if (!this.isExpanded) return;
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this.set("isExpanded", false);
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Ember.run.next(() => {
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this._boundaryActionHandler("onCollapse", this);
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Ember.run.schedule("afterRender", () => {
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if (!this.isDestroying && !this.isDestroyed) {
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this._removeFixedPosition();
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}
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});
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});
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},
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// lose focus of the component in two steps
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// first collapse and keep focus and then remove focus
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unfocus(event) {
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if (this.isExpanded) {
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this.collapse(event);
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this.focus(event);
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} else {
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this.close(event);
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}
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},
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_destroyEvent(event) {
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event.preventDefault();
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event.stopPropagation();
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},
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_applyDirection() {
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let options = { left: "auto", bottom: "auto", top: "auto" };
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const discourseHeader = $(".d-header")[0];
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const discourseHeaderHeight = discourseHeader
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? discourseHeader.getBoundingClientRect().top +
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this._computedStyle(discourseHeader, "height")
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: 0;
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const bodyHeight = this._computedStyle(this.$body()[0], "height");
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const componentHeight = this._computedStyle(this.element, "height");
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const offsetTop = this.element.getBoundingClientRect().top;
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const offsetBottom = this.element.getBoundingClientRect().bottom;
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const windowWidth = $(window).width();
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if (this.fullWidthOnMobile && (this.site && this.site.isMobileDevice)) {
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const margin = 10;
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const relativeLeft =
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$(this.element).offset().left - $(window).scrollLeft();
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options.left = margin - relativeLeft;
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options.width = windowWidth - margin * 2;
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options.maxWidth = options.minWidth = "unset";
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} else {
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const parentWidth = this.$scrollableParent().length
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? this.$scrollableParent().width()
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: windowWidth;
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const bodyWidth = this._computedStyle(this.$body()[0], "width");
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let spaceToLeftEdge;
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if (this.$scrollableParent().length) {
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spaceToLeftEdge =
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$(this.element).offset().left -
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this.$scrollableParent().offset().left;
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} else {
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spaceToLeftEdge = this.element.getBoundingClientRect().left;
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}
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let isLeftAligned = true;
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const spaceToRightEdge = parentWidth - spaceToLeftEdge;
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const elementWidth = this.element.getBoundingClientRect().width;
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if (spaceToRightEdge > spaceToLeftEdge + elementWidth) {
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isLeftAligned = false;
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}
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if (isLeftAligned) {
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this.element.classList.add("is-left-aligned");
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this.element.classList.remove("is-right-aligned");
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if (this._isRTL()) {
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options.right = this.horizontalOffset;
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} else {
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options.left = -bodyWidth + elementWidth - this.horizontalOffset;
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}
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} else {
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this.element.classList.add("is-right-aligned");
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this.element.classList.remove("is-left-aligned");
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if (this._isRTL()) {
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options.right = -bodyWidth + elementWidth - this.horizontalOffset;
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} else {
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options.left = this.horizontalOffset;
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}
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}
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}
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const fullHeight = this.verticalOffset + bodyHeight + componentHeight;
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const hasBelowSpace = $(window).height() - offsetBottom - fullHeight >= -1;
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const hasAboveSpace = offsetTop - fullHeight - discourseHeaderHeight >= -1;
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const headerHeight = this._computedStyle(this.$header()[0], "height");
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if (hasBelowSpace || (!hasBelowSpace && !hasAboveSpace)) {
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this.element.classList.add("is-below");
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this.element.classList.remove("is-above");
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options.top = headerHeight + this.verticalOffset;
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} else {
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this.element.classList.add("is-above");
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this.element.classList.remove("is-below");
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options.bottom = headerHeight + this.verticalOffset;
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}
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this.$body().css(options);
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},
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_applyFixedPosition() {
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if (this.isExpanded !== true) return;
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if (this.$fixedPlaceholder().length) return;
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if (!this.$scrollableParent().length) return;
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const width = this._computedStyle(this.element, "width");
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const height = this._computedStyle(this.element, "height");
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this._previousScrollParentOverflow =
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this._previousScrollParentOverflow ||
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this.$scrollableParent().css("overflow");
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this._previousCSSContext = this._previousCSSContext || {
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width,
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minWidth: this.element.style.minWidth,
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maxWidth: this.element.style.maxWidth,
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top: this.element.style.top,
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left: this.element.style.left,
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marginLeft: this.element.style.marginLeft,
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marginRight: this.element.style.marginRight,
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position: this.element.style.position
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};
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const componentStyles = {
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top: this.element.getBoundingClientRect().top,
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width,
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left: this.element.getBoundingClientRect().left,
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marginLeft: 0,
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marginRight: 0,
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minWidth: "unset",
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maxWidth: "unset",
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position: "fixed"
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};
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const $placeholderTemplate = $(
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`<div class='select-kit-fixed-placeholder-${this.elementId}'></div>`
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);
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$placeholderTemplate.css({
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display: "inline-block",
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width,
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height,
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"margin-bottom": this.element.style.marginBottom,
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"vertical-align": "middle"
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});
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$(this.element)
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.before($placeholderTemplate)
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.css(componentStyles);
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this.$scrollableParent().css({ overflow: "hidden" });
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},
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_removeFixedPosition() {
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this.$fixedPlaceholder().remove();
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if (!this.element || this.isDestroying || this.isDestroyed) return;
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if (this.$scrollableParent().length === 0) return;
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$(this.element).css(this._previousCSSContext || {});
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this.$scrollableParent().css(
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"overflow",
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this._previousScrollParentOverflow || {}
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);
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},
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_positionWrapper() {
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const elementWidth = this._computedStyle(this.element, "width");
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const headerHeight = this._computedStyle(this.$header()[0], "height");
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const bodyHeight = this._computedStyle(this.$body()[0], "height");
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this.$wrapper().css({
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width: elementWidth,
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height: headerHeight + bodyHeight
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});
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},
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_isRTL() {
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return $("html").css("direction") === "rtl";
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},
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_computedStyle(element, style) {
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if (!element) return 0;
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let value;
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if (window.getComputedStyle) {
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value = window.getComputedStyle(element, null)[style];
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} else {
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value = $(element).css(style);
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}
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return this._getFloat(value);
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},
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_getFloat(value) {
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value = parseFloat(value);
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return $.isNumeric(value) ? value : 0;
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}
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});
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