mirror of
https://github.com/thelounge/thelounge.git
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135 lines
3.8 KiB
JavaScript
135 lines
3.8 KiB
JavaScript
"use strict";
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const $ = require("jquery");
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const Mousetrap = require("mousetrap");
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const templates = require("../views");
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/* Image viewer */
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const imageViewer = $("#image-viewer");
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$("#windows").on("click", ".toggle-thumbnail", function(event, data = {}) {
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const link = $(this);
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// Passing `data`, specifically `data.pushState`, to not add the action to the
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// history state if back or forward buttons were pressed.
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openImageViewer(link, data);
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// Prevent the link to open a new page since we're opening the image viewer,
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// but keep it a link to allow for Ctrl/Cmd+click.
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// By binding this event on #chat we prevent input gaining focus after clicking.
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return false;
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});
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imageViewer.on("click", function(event, data = {}) {
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// Passing `data`, specifically `data.pushState`, to not add the action to the
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// history state if back or forward buttons were pressed.
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closeImageViewer(data);
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});
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Mousetrap.bind("esc", () => closeImageViewer());
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Mousetrap.bind(["left", "right"], (e, key) => {
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if (imageViewer.hasClass("opened")) {
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const direction = key === "left" ? "previous" : "next";
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imageViewer.find(`.${direction}-image-btn`).trigger("click");
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}
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});
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function openImageViewer(link, {pushState = true} = {}) {
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$(".previous-image").removeClass("previous-image");
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$(".next-image").removeClass("next-image");
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// The next two blocks figure out what are the previous/next images. We first
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// look within the same message, as there can be multiple thumbnails per
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// message, and if not, we look at previous/next messages and take the
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// last/first thumbnail available.
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// Only expanded thumbnails are being cycled through.
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// Previous image
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let previousImage = link
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.closest(".preview")
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.prev(".preview")
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.find(".toggle-content .toggle-thumbnail")
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.last();
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if (!previousImage.length) {
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previousImage = link
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.closest(".msg")
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.prevAll()
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.find(".toggle-content .toggle-thumbnail")
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.last();
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}
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previousImage.addClass("previous-image");
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// Next image
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let nextImage = link
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.closest(".preview")
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.next(".preview")
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.find(".toggle-content .toggle-thumbnail")
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.first();
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if (!nextImage.length) {
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nextImage = link
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.closest(".msg")
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.nextAll()
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.find(".toggle-content .toggle-thumbnail")
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.first();
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}
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nextImage.addClass("next-image");
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imageViewer.html(
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templates.image_viewer({
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image: link.find("img").prop("src"),
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link: link.prop("href"),
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type: link.parent().hasClass("toggle-type-link") ? "link" : "image",
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hasPreviousImage: previousImage.length > 0,
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hasNextImage: nextImage.length > 0,
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})
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);
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// Turn off transitionend listener before opening the viewer,
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// which caused image viewer to become empty in rare cases
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imageViewer.off("transitionend").addClass("opened");
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// History management
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if (pushState) {
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let clickTarget = "";
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// Images can be in a message (channel URL previews) or not (window URL
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// preview, e.g. changelog). This is sub-optimal and needs improvement to
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// make image preview more generic and not specific for channel previews.
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if (link.closest(".msg").length > 0) {
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clickTarget = `#${link.closest(".msg").prop("id")} `;
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}
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clickTarget += `a.toggle-thumbnail[href="${link.prop("href")}"] img`;
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history.pushState({clickTarget}, null, null);
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}
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}
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imageViewer.on("click", ".previous-image-btn", function() {
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$(".previous-image").trigger("click");
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return false;
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});
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imageViewer.on("click", ".next-image-btn", function() {
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$(".next-image").trigger("click");
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return false;
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});
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function closeImageViewer({pushState = true} = {}) {
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imageViewer.removeClass("opened").one("transitionend", function() {
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imageViewer.empty();
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});
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// History management
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if (pushState) {
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const clickTarget =
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"#sidebar " + `.chan[data-id="${$("#sidebar .chan.active").attr("data-id")}"]`;
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history.pushState({clickTarget}, null, null);
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}
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}
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