476 lines
14 KiB
Vue
476 lines
14 KiB
Vue
<template>
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<!-- hiding elements instead of using 'v-if' is used here as an optimization -->
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<div class="image-preview-wrapper" :class="{visible: visible, interactive: sticky}">
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<div class="image-preview-toolbar" v-if="sticky || debug">
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<a @click="toggleDevMode()" :class="{toggled: debug}" title="Debug Mode"><i class="fa fa-terminal"></i></a>
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<a @click="toggleJsMode()" :class="{toggled: runJs}" title="Expand Images"><i class="fa fa-magic"></i></a>
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<a @click="reloadUrl()" title="Reload Image"><i class="fa fa-redo-alt"></i></a>
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<a @click="toggleStickyMode()" :class="{toggled: sticky}" title="Toggle Stickyness"><i class="fa fa-thumbtack"></i></a>
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</div>
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<webview webpreferences="allowRunningInsecureContent, autoplayPolicy=no-user-gesture-required" id="image-preview-ext" ref="imagePreviewExt" class="image-preview-external" :src="externalUrl" :style="{display: externalUrlVisible ? 'flex' : 'none'}"></webview>
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<div
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class="image-preview-local"
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:style="{backgroundImage: `url(${internalUrl})`, display: internalUrlVisible ? 'block' : 'none'}"
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>
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</div>
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</div>
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</template>
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<script lang="ts">
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import {Component, Hook} from '@f-list/vue-ts';
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import Vue from 'vue';
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import { EventBus, EventBusEvent } from './event-bus';
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import {domain} from '../bbcode/core';
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import {ImagePreviewMutator} from './image-preview-mutator';
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import {Point, screen, WebviewTag} from 'electron';
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import Timer = NodeJS.Timer;
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interface DidFailLoadEvent extends Event {
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errorCode: number;
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errorDescription: string;
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}
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interface DidNavigateEvent extends Event {
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httpResponseCode: number;
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httpStatusText: string;
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}
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@Component
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export default class ImagePreview extends Vue {
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private readonly MinTimePreviewVisible = 500;
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visible = false;
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externalUrlVisible = false;
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internalUrlVisible = false;
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externalUrl: string | null = null;
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internalUrl: string | null = null;
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url: string | null = null;
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domain: string | undefined;
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sticky = false;
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runJs = true;
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debug = false;
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private jsMutator = new ImagePreviewMutator(this.debug);
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private interval: Timer | null = null;
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private exitInterval: Timer | null = null;
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private exitUrl: string | null = null;
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private initialCursorPosition: Point | null = null;
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private shouldDismiss = false;
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private visibleSince = 0;
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@Hook('mounted')
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onMounted(): void {
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EventBus.$on(
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'imagepreview-dismiss',
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(eventData: EventBusEvent) => {
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// console.log('Event dismiss', eventData.url);
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this.dismiss(eventData.url as string);
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}
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);
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EventBus.$on(
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'imagepreview-show',
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(eventData: EventBusEvent) => {
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// console.log('Event show', eventData.url);
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this.show(eventData.url as string);
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}
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);
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EventBus.$on(
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'imagepreview-toggle-stickyness',
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(eventData: EventBusEvent) => {
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if ((this.url === (eventData.url as string)) && (this.visible))
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this.sticky = !this.sticky;
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}
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);
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const webview = this.getWebview();
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webview.addEventListener(
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'dom-ready',
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(event: EventBusEvent) => {
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const url = webview.getURL();
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const js = this.jsMutator.getMutatorJsForSite(url);
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if (this.debug)
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console.log('ImagePreview dom-ready', event, js);
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if ((js) && (this.runJs))
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webview.executeJavaScript(js);
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}
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);
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webview.addEventListener(
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'did-fail-load',
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(event: Event) => {
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const e = event as DidFailLoadEvent;
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const js = this.jsMutator.getErrorMutator(e.errorCode, e.errorDescription);
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if (this.debug)
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console.log('ImagePreview did-fail-load', event, js);
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if ((js) && (this.runJs) && (e.errorCode >= 400))
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webview.executeJavaScript(js);
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}
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);
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webview.addEventListener(
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'did-navigate',
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(event: Event) => {
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const e = event as DidNavigateEvent;
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if (e.httpResponseCode >= 400) {
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const js = this.jsMutator.getErrorMutator(e.httpResponseCode, e.httpStatusText);
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if (this.debug)
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console.log('ImagePreview did-navigate', event, js);
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if ((js) && (this.runJs))
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webview.executeJavaScript(js);
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}
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}
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);
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// webview.getWebContents().on(
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webview.addEventListener(
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'did-finish-load',
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(event: Event) => {
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if (this.debug)
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console.log('ImagePreview did-finish-load', event);
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webview.getWebContents().session.on(
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'will-download',
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(e: Event) => {
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e.preventDefault();
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}
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);
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}
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);
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setInterval(
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() => {
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if (((this.visible) && (!this.exitInterval) && (!this.shouldDismiss)) || (this.interval))
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this.initialCursorPosition = screen.getCursorScreenPoint();
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if ((this.visible) && (this.shouldDismiss) && (this.hasMouseMovedSince()) && (!this.exitInterval) && (!this.interval))
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this.hide();
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},
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10
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);
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}
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hide(): void {
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this.cancelExitTimer();
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this.url = null;
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this.visible = false;
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if (this.externalUrlVisible) {
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const webview = this.getWebview();
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webview.executeJavaScript(this.jsMutator.getHideMutator());
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}
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this.internalUrlVisible = false;
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this.externalUrlVisible = false;
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// this.externalUrl = null; // 'about:blank';
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this.internalUrl = null; // 'about:blank';
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this.exitUrl = null;
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this.exitInterval = null;
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this.shouldDismiss = false;
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this.sticky = false;
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}
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dismiss(url: string): void {
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if (this.url !== url)
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return; // simply ignore
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// if (this.debug)
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// return;
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if (this.sticky)
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return;
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// console.log('DISMISS');
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const due = this.visible ? this.MinTimePreviewVisible - Math.min(this.MinTimePreviewVisible, (Date.now() - this.visibleSince)) : 0;
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this.cancelTimer();
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if (this.exitInterval)
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return;
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this.exitUrl = this.url;
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this.shouldDismiss = true;
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if (!this.hasMouseMovedSince())
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return;
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// This timeout makes the preview window disappear with a slight delay, which helps UX
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// when dealing with situations such as quickly scrolling text that moves the cursor away
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// from the link
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// tslint:disable-next-line no-unnecessary-type-assertion
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this.exitInterval = setTimeout(
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() => this.hide(),
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due
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) as Timer;
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}
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show(url: string): void {
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// console.log('SHOW');
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if ((this.visible) && (!this.hasMouseMovedSince()))
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return;
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if ((this.url === url) && ((this.visible) || (this.interval)))
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return;
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if ((this.url) && (this.sticky) && (this.visible))
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return;
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const due = ((url === this.exitUrl) && (this.exitInterval)) ? 0 : 100;
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this.url = url;
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this.domain = domain(url);
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this.cancelExitTimer();
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this.cancelTimer();
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// This timer makes sure that just by accidentally brushing across a link won't show (blink) the preview
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// -- you actually have to pause on it
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// tslint:disable-next-line no-unnecessary-type-assertion
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this.interval = setTimeout(
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() => {
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const isInternal = this.isInternalUrl();
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this.internalUrlVisible = isInternal;
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this.externalUrlVisible = !isInternal;
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if (isInternal) {
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this.internalUrl = this.url;
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} else {
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const webview = this.getWebview();
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try {
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if (webview.getURL() === this.url) {
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webview.executeJavaScript(this.jsMutator.getReShowMutator());
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}
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} catch (err) {
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console.log('Webview reuse error', err);
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}
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this.externalUrl = this.url;
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}
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this.visible = true;
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this.visibleSince = Date.now();
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this.initialCursorPosition = screen.getCursorScreenPoint();
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},
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due
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) as Timer;
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}
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hasMouseMovedSince(): boolean {
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if (!this.initialCursorPosition)
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return true;
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try {
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const p = screen.getCursorScreenPoint();
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return ((p.x !== this.initialCursorPosition.x) || (p.y !== this.initialCursorPosition.y));
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} catch (err) {
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console.error(err);
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return true;
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}
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}
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cancelTimer(): void {
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if (this.interval)
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clearTimeout(this.interval);
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this.interval = null;
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}
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cancelExitTimer(): void {
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if (this.exitInterval)
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clearTimeout(this.exitInterval);
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this.exitInterval = null;
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}
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isVisible(): boolean {
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return this.visible;
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}
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getUrl(): string | null {
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return this.url;
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}
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isExternalUrl(): boolean {
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// 'f-list.net' is tested here on purpose, because keeps the character URLs from being previewed
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return !((this.domain === 'f-list.net') || (this.domain === 'static.f-list.net'));
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}
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isInternalUrl(): boolean {
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return !this.isExternalUrl();
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}
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toggleDevMode(): void {
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this.debug = !this.debug;
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this.jsMutator.setDebug(this.debug);
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if (this.debug) {
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const webview = this.getWebview();
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webview.openDevTools();
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}
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}
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toggleStickyMode(): void {
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this.sticky = !this.sticky;
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if (!this.sticky)
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this.hide();
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}
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toggleJsMode(): void {
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this.runJs = !this.runJs;
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}
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reloadUrl(): void {
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if (this.externalUrlVisible) {
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const webview = this.getWebview();
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webview.reload();
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}
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}
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getWebview(): WebviewTag {
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return this.$refs.imagePreviewExt as WebviewTag;
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}
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}
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</script>
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<style lang="scss">
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@import "~bootstrap/scss/functions";
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@import "~bootstrap/scss/variables";
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@import "~bootstrap/scss/mixins/breakpoints";
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.image-preview-wrapper {
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z-index: 10000;
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display: none;
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position: absolute;
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left: 0;
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top: 0;
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width: 50%;
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height: 70%;
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pointer-events: none;
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&.visible {
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display: block;
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}
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&.interactive {
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pointer-events: auto;
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.image-preview-local,
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.image-preview-auto {
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// pointer-events: auto;
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}
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}
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.image-preview-external {
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/* position: absolute;
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width: 50%;
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height: 70%;
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top: 0;
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left: 0; */
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width: 100%;
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height: 100%;
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// pointer-events: none;
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background-color: black;
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}
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.image-preview-local {
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/* position: absolute;
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width: 50%;
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height: 70%;
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top: 0;
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left: 0; */
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width: 100%;
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height: 100%;
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// pointer-events: none;
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background-size: contain;
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background-position: top left;
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background-repeat: no-repeat;
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// background-color: black;
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}
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.image-preview-toolbar {
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position: absolute;
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/* background-color: green; */
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left: 0;
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top: 0;
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margin: 1rem;
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height: 3.5rem;
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display: flex;
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-webkit-backdrop-filter: blur(10px);
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flex-direction: row;
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width: 15rem;
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flex-wrap: nowrap;
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background-color: rgba(77, 76, 116, 0.92);
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border-radius: 3px;
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border: 1px solid rgba(255, 255, 255, 0.3);
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padding: 0.5rem;
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box-shadow: 2px 2px 3px rgba(0, 0, 0, 0.2);
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a i.fa {
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font-size: 1.25rem;
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top: 50%;
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position: relative;
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transform: translateY(-50%);
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}
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a {
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flex: 1;
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text-align: center;
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border: 1px solid rgba(255, 255, 255, 0.25);
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border-radius: 3px;
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margin-right: 0.5rem;
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background-color: rgba(0, 0, 0, 0.1);
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}
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a:last-child {
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margin-right: 0;
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}
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.toggled {
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background-color: rgba(255, 255, 255, 0.2);
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box-shadow: 0 0 1px 0px rgba(255, 255, 255, 0.6);
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}
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}
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}
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</style>
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