767 lines
24 KiB
Vue
767 lines
24 KiB
Vue
<template>
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<div ref="main" class="main">
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<div v-show="toggleLayout" class="layout">
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<div v-html="page1"></div>
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</div>
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<div v-show="!toggleLayout" class="layout">
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<div v-html="page2"></div>
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</div>
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<div v-show="showStatusBar" ref="statusBar" class="layout">
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<div v-html="statusBar"></div>
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</div>
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<div ref="layoutEvents" class="layout events" @mousedown.prevent.stop="onMouseDown" @mouseup.prevent.stop="onMouseUp"
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@wheel.prevent.stop="onMouseWheel"
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@touchstart.stop="onTouchStart" @touchend.stop="onTouchEnd" @touchcancel.prevent.stop="onTouchCancel"
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oncontextmenu="return false;">
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<div v-show="showStatusBar" v-html="statusBarClickable" @mousedown.prevent.stop @touchstart.stop
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@click.prevent.stop="onStatusBarClick"></div>
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<div v-show="fontsLoading" ref="fontsLoading"></div>
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</div>
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<!-- невидимым делать нельзя, вовремя не подгружаютя шрифты -->
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<canvas ref="offscreenCanvas" class="layout" style="width: 0px; height: 0px"></canvas>
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</div>
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</template>
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<script>
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//-----------------------------------------------------------------------------
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import Vue from 'vue';
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import Component from 'vue-class-component';
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import {loadCSS} from 'fg-loadcss';
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import _ from 'lodash';
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import {sleep} from '../../../share/utils';
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import bookManager from '../share/bookManager';
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import DrawHelper from './DrawHelper';
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export default @Component({
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watch: {
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bookPos: function(newValue) {
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this.debouncedEmitPosChange(newValue);
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this.draw();
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},
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},
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})
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class TextPage extends Vue {
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toggleLayout = false;
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showStatusBar = false;
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page1 = null;
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page2 = null;
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statusBar = null;
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statusBarClickable = null;
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fontsLoading = null;
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lastBook = null;
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bookPos = 0;
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fontStyle = null;
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fontSize = null;
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fontName = null;
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meta = null;
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created() {
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this.drawHelper = new DrawHelper();
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this.commit = this.$store.commit;
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this.dispatch = this.$store.dispatch;
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this.config = this.$store.state.config;
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this.reader = this.$store.state.reader;
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this.debouncedEmitPosChange = _.debounce((newValue) => {
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this.$emit('book-pos-changed', {bookPos: newValue, bookPosSeen: this.bookPosSeen});
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}, 1000);
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this.debouncedStartClickRepeat = _.debounce((x, y) => {
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this.startClickRepeat(x, y);
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}, 800);
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this.debouncedPrepareNextPage = _.debounce(() => {
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this.prepareNextPage();
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}, 100);
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this.debouncedDrawStatusBar = _.throttle(() => {
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this.drawStatusBar();
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}, 60);
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this.$root.$on('resize', () => {this.$nextTick(this.onResize)});
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this.mobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent);
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}
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mounted() {
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this.context = this.$refs.offscreenCanvas.getContext('2d');
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}
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hex2rgba(hex, alpha = 1) {
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const [r, g, b] = hex.match(/\w\w/g).map(x => parseInt(x, 16));
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return `rgba(${r},${g},${b},${alpha})`;
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}
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calcDrawProps() {
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//preloaded fonts
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this.fontShifts = {//%
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ReaderDefault: 0,
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Roboto: 0,
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OpenSans: 0,
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Rubik: 0,
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Avrile: -10,
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Arimo: 0,
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GEO_1: 10,
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}
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if (!this.fontShifts.hasOwnProperty(this.fontName))
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this.fontShifts[this.fontName] = this.fontVertShift;
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this.fontList = [];
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for (let fontName in this.fontShifts)
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this.fontList.push(`12px ${fontName}`);
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//widths
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this.realWidth = this.$refs.main.clientWidth;
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this.realHeight = this.$refs.main.clientHeight;
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this.$refs.layoutEvents.style.width = this.realWidth + 'px';
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this.$refs.layoutEvents.style.height = this.realHeight + 'px';
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this.w = this.realWidth - 2*this.indent;
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this.h = this.realHeight - (this.showStatusBar ? this.statusBarHeight : 0);
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this.lineHeight = this.fontSize + this.lineInterval;
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this.pageLineCount = Math.floor(this.h/this.lineHeight);
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if (this.parsed) {
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this.parsed.p = this.p;
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this.parsed.w = this.w;// px, ширина текста
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this.parsed.font = this.font;
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this.parsed.wordWrap = this.wordWrap;
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this.parsed.measureText = this.measureText;
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}
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//сообщение "Загрузка шрифтов..."
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const flText = 'Загрузка шрифта...';
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this.$refs.fontsLoading.innerHTML = flText;
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const fontsLoadingStyle = this.$refs.fontsLoading.style;
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fontsLoadingStyle.position = 'absolute';
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fontsLoadingStyle.fontSize = this.fontSize + 'px';
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fontsLoadingStyle.top = (this.realHeight/2 - 2*this.fontSize) + 'px';
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fontsLoadingStyle.left = (this.realWidth - this.measureText(flText, {}))/2 + 'px';
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//stuff
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this.statusBarColor = this.hex2rgba(this.textColor, this.statusBarColorAlpha);
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this.currentTransition = '';
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this.pageChangeDirectionDown = true;
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this.fontShift = (this.fontShifts[this.fontName] ? this.fontShifts[this.fontName] : 0)/100;
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//drawHelper
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this.drawHelper.realWidth = this.realWidth;
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this.drawHelper.realHeight = this.realHeight;
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this.drawHelper.backgroundColor = this.backgroundColor;
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this.drawHelper.statusBarColor = this.statusBarColor;
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this.drawHelper.fontName = this.fontName;
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this.drawHelper.fontShift = this.fontShift;
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this.drawHelper.measureText = this.measureText;
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this.drawHelper.measureTextFont = this.measureTextFont;
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this.$refs.statusBar.style.left = '0px';
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this.$refs.statusBar.style.top = (this.statusBarTop ? 1 : this.realHeight - this.statusBarHeight) + 'px';
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this.statusBarClickable = this.drawHelper.statusBarClickable(this.statusBarTop, this.statusBarHeight);
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}
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measureText(text, style) {// eslint-disable-line no-unused-vars
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this.context.font = this.fontByStyle(style);
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return this.context.measureText(text).width;
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}
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measureTextFont(text, font) {// eslint-disable-line no-unused-vars
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this.context.font = font;
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return this.context.measureText(text).width;
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}
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async checkLoadedFonts() {
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let loaded = await Promise.all(this.fontList.map(font => document.fonts.check(font)));
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if (loaded.some(r => !r)) {
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loaded = await Promise.all(this.fontList.map(font => document.fonts.load(font)));
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if (loaded.some(r => !r.length))
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throw new Error('some font not loaded');
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}
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}
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async loadFonts() {
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this.fontsLoading = true;
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if (!this.fontsLoaded)
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this.fontsLoaded = {};
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//загрузка дин.шрифта
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const loaded = this.fontsLoaded[this.fontCssUrl];
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if (this.fontCssUrl && !loaded) {
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loadCSS(this.fontCssUrl);
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this.fontsLoaded[this.fontCssUrl] = 1;
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}
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const waitingTime = 10*1000;
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const delay = 100;
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let i = 0;
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//ждем шрифты
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while (i < waitingTime/delay) {
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i++;
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try {
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await this.checkLoadedFonts();
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i = waitingTime;
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} catch (e) {
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await sleep(delay);
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}
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}
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if (i !== waitingTime) {
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this.$notify.error({
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title: 'Ошибка загрузки',
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message: 'Некоторые шрифты не удалось загрузить'
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});
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}
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this.fontsLoading = false;
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}
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showBook() {
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this.$refs.main.focus();
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this.toggleLayout = false;
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this.book = null;
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this.meta = null;
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this.fb2 = null;
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this.parsed = null;
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this.linesUp = null;
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this.linesDown = null;
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//default draw props
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this.textColor = '#000000';
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this.backgroundColor = '#478355';
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this.fontStyle = '';// 'bold','italic'
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this.fontSize = 35;// px
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this.fontName = 'GEO_1';
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this.fontCssUrl = '';
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this.fontVertShift = 0;
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this.lineInterval = 7;// px, межстрочный интервал
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this.textAlignJustify = true;// выравнивание по ширине
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this.p = 50;// px, отступ параграфа
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this.indent = 15;// px, отступ всего текста слева и справа
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this.wordWrap = true;
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this.keepLastToFirst = true;// перенос последней строки в первую при листании
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this.showStatusBar = true;
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this.statusBarTop = false;// top, bottom
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this.statusBarHeight = 19;// px
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this.statusBarColorAlpha = 0.4;
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this.pageChangeTransition = '';// '' - нет, downShift, rightShift, thaw - протаивание, blink - мерцание
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this.pageChangeTransitionSpeed = 50; //0-100%
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this.calcDrawProps();
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this.draw();// пока не загрузили, очистим канвас
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if (this.lastBook) {
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(async() => {
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const isParsed = await bookManager.hasBookParsed(this.lastBook);
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if (!isParsed) {
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return;
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}
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this.book = await bookManager.getBook(this.lastBook);
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this.meta = bookManager.metaOnly(this.book);
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this.fb2 = this.meta.fb2;
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const authorName = _.compact([
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this.fb2.lastName,
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this.fb2.firstName,
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this.fb2.middleName
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]).join(' ');
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this.title = _.compact([
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authorName,
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this.fb2.bookTitle
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]).join(' - ');
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this.$root.$emit('set-app-title', this.title);
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this.parsed = this.book.parsed;
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this.calcDrawProps();
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await this.loadFonts();
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//this.draw();
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// шрифты хрен знает когда подгружаются, поэтому
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let i = 0;
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this.parsed.force = true;
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while (i < 10) {
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this.draw();
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await sleep(1000);
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i++;
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}
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this.parsed.force = false;
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this.refreshTime();
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})();
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}
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}
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onResize() {
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this.calcDrawProps();
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this.draw();
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}
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get font() {
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return `${this.fontStyle} ${this.fontSize}px ${this.fontName}`;
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}
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fontByStyle(style) {
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return `${style.italic ? 'italic' : ''} ${style.bold ? 'bold' : ''} ${this.fontSize}px ${this.fontName}`;
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}
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draw() {
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if (this.w < 10)
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return;
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if (this.book && this.bookPos > 0 && this.bookPos >= this.parsed.textLength) {
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this.doEnd();
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return;
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}
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this.toggleLayout = !this.toggleLayout;
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if (this.pageChangeDirectionDown && this.pagePrepared && this.bookPos == this.bookPosPrepared) {
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this.linesDown = this.linesDownNext;
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this.linesUp = this.linesUpNext;
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} else {
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if (this.toggleLayout)
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this.page1 = this.drawPage(this.bookPos);
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else
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this.page2 = this.drawPage(this.bookPos);
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}
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if (this.currentTransition) {
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//this.currentTransition
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//this.pageChangeTransitionSpeed
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//this.pageChangeDirectionDown
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//curr to next transition
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//пока заглушка
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}
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this.currentTransition = '';
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this.pageChangeDirectionDown = false;//true только если PgDown
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this.pagePrepared = false;
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this.debouncedPrepareNextPage();
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this.debouncedDrawStatusBar();
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}
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drawPage(bookPos, nextChangeLines) {
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if (!this.lastBook)
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return;
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let out = `<div class="layout" style="width: ${this.realWidth}px; height: ${this.realHeight}px;` +
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` color: ${this.textColor}; background-color: ${this.backgroundColor}">`;
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if (!this.book || !this.parsed.textLength) {
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out += '</div>';
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return out;
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}
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const spaceWidth = this.measureText(' ', {});
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const lines = this.parsed.getLines(bookPos, 2*this.pageLineCount);
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if (!nextChangeLines) {
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this.linesDown = lines;
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this.linesUp = this.parsed.getLines(bookPos, -2*this.pageLineCount);
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} else {
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this.linesDownNext = lines;
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this.linesUpNext = this.parsed.getLines(bookPos, -2*this.pageLineCount);
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}
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let y = -this.lineInterval/2 + (this.h - this.pageLineCount*this.lineHeight)/2 + this.fontSize*this.fontShift;
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if (this.showStatusBar)
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y += this.statusBarHeight*(this.statusBarTop ? 1 : 0);
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let len = lines.length;
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len = (len > this.pageLineCount ? len = this.pageLineCount : len);
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for (let i = 0; i < len; i++) {
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const line = lines[i];
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/* line:
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{
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begin: Number,
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end: Number,
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first: Boolean,
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last: Boolean,
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parts: array of {
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style: {bold: Boolean, italic: Boolean, center: Boolean}
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text: String,
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}
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}*/
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let indent = this.indent + (line.first ? this.p : 0);
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let lineText = '';
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let center = false;
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let centerStyle = {};
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for (const part of line.parts) {
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lineText += part.text;
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center = center || part.style.center;
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if (part.style.center)
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centerStyle = part.style.center;
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}
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let filled = false;
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// если выравнивание по ширине включено
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if (this.textAlignJustify && !line.last && !center) {
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const words = lineText.split(' ');
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if (words.length > 1) {
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const spaceCount = words.length - 1;
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const space = (this.w - line.width + spaceWidth*spaceCount)/spaceCount;
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let x = indent;
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for (const part of line.parts) {
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const font = this.fontByStyle(part.style);
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let partWords = part.text.split(' ');
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for (let i = 0; i < partWords.length; i++) {
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let word = partWords[i];
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out += this.drawHelper.fillText(word, x, y, font);
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x += this.measureText(word, part.style) + (i < partWords.length - 1 ? space : 0);
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}
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}
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filled = true;
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}
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}
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// просто выводим текст
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if (!filled) {
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let x = indent;
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x = (center ? this.indent + (this.w - this.measureText(lineText, centerStyle))/2 : x);
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for (const part of line.parts) {
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let text = part.text;
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const font = this.fontByStyle(part.style);
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out += this.drawHelper.fillText(text, x, y, font);
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x += this.measureText(text, part.style);
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}
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}
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y += this.lineHeight;
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}
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out += '</div>';
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return out;
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}
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drawStatusBar() {
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if (this.showStatusBar && this.linesDown) {
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const lines = this.linesDown;
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let i = this.pageLineCount;
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if (this.keepLastToFirst)
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i--;
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i = (i > lines.length - 1 ? lines.length - 1 : i);
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if (i >= 0) {
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this.statusBar = this.drawHelper.drawStatusBar(this.statusBarTop, this.statusBarHeight,
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lines[i].end, this.parsed.textLength, this.title);
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this.bookPosSeen = lines[i].end;
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}
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}
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}
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async refreshTime() {
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if (!this.timeRefreshing) {
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this.timeRefreshing = true;
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await sleep(60*1000);
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if (this.book && this.parsed.textLength) {
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this.debouncedDrawStatusBar();
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}
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this.timeRefreshing = false;
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this.refreshTime();
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}
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}
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prepareNextPage() {
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// подготовка следующей страницы заранее
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if (!this.book || !this.parsed.textLength || !this.linesDown)
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return;
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if (!this.preparing) {
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this.preparing = true;
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(async() => {
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await sleep(100);
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if (this.cancelPrepare) {
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this.preparing = false;
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return;
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}
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let i = this.pageLineCount;
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if (this.keepLastToFirst)
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i--;
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if (i >= 0 && this.linesDown.length > i) {
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this.bookPosPrepared = this.linesDown[i].begin;
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if (this.toggleLayout)
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this.page2 = this.drawPage(this.bookPosPrepared, true);//наоборот
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else
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this.page1 = this.drawPage(this.bookPosPrepared, true);
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this.pagePrepared = true;
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}
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this.preparing = false;
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})();
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}
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}
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doDown() {
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if (this.linesDown && this.linesDown.length > this.pageLineCount) {
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this.bookPos = this.linesDown[1].begin;
|
|
}
|
|
}
|
|
|
|
doUp() {
|
|
if (this.linesUp && this.linesUp.length > 1) {
|
|
this.bookPos = this.linesUp[1].begin;
|
|
}
|
|
}
|
|
|
|
doPageDown() {
|
|
if (this.linesDown) {
|
|
let i = this.pageLineCount;
|
|
if (this.keepLastToFirst)
|
|
i--;
|
|
if (i >= 0 && this.linesDown.length >= 2*i) {
|
|
this.currentTransition = this.pageChangeTransition;
|
|
this.pageChangeDirectionDown = true;
|
|
this.bookPos = this.linesDown[i].begin;
|
|
} else
|
|
this.doEnd();
|
|
}
|
|
}
|
|
|
|
doPageUp() {
|
|
if (this.linesUp) {
|
|
let i = this.pageLineCount;
|
|
if (this.keepLastToFirst)
|
|
i--;
|
|
i = (i > this.linesUp.length - 1 ? this.linesUp.length - 1 : i);
|
|
if (i >= 0 && this.linesUp.length > i) {
|
|
this.currentTransition = this.pageChangeTransition;
|
|
this.pageChangeDirectionDown = false;
|
|
this.bookPos = this.linesUp[i].begin;
|
|
}
|
|
}
|
|
}
|
|
|
|
doHome() {
|
|
this.bookPos = 0;
|
|
}
|
|
|
|
doEnd() {
|
|
if (this.parsed.para.length) {
|
|
let i = this.parsed.para.length - 1;
|
|
let lastPos = this.parsed.para[i].offset + this.parsed.para[i].length - 1;
|
|
const lines = this.parsed.getLines(lastPos, -this.pageLineCount);
|
|
i = this.pageLineCount - 1;
|
|
i = (i > lines.length - 1 ? lines.length - 1 : i);
|
|
this.bookPos = lines[i].begin;
|
|
}
|
|
}
|
|
|
|
doToolBarToggle() {
|
|
this.$emit('tool-bar-toggle');
|
|
}
|
|
|
|
keyHook(event) {
|
|
//console.log(event.code);
|
|
if (event.type == 'keydown') {
|
|
switch (event.code) {
|
|
case 'ArrowDown':
|
|
this.doDown();
|
|
break;
|
|
case 'ArrowUp':
|
|
this.doUp();
|
|
break;
|
|
case 'PageDown':
|
|
case 'ArrowRight':
|
|
case 'Space':
|
|
this.doPageDown();
|
|
break;
|
|
case 'PageUp':
|
|
case 'ArrowLeft':
|
|
case 'Backspace':
|
|
this.doPageUp();
|
|
break;
|
|
case 'Home':
|
|
this.doHome();
|
|
break;
|
|
case 'End':
|
|
this.doEnd();
|
|
break;
|
|
case 'Enter':
|
|
case 'Backquote'://`
|
|
case 'KeyF':
|
|
if (this.fullScreenToggle)
|
|
this.fullScreenToggle();
|
|
break;
|
|
case 'Tab':
|
|
this.doToolBarToggle();
|
|
event.preventDefault();
|
|
event.stopPropagation();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
async startClickRepeat(pointX, pointY) {
|
|
this.repX = pointX;
|
|
this.repY = pointY;
|
|
|
|
if (!this.repInit && this.repDoing) {
|
|
this.repInit = true;
|
|
let delay = 400;
|
|
while (this.repDoing) {
|
|
this.handleClick(pointX, pointY);
|
|
await sleep(delay);
|
|
if (delay > 15)
|
|
delay *= 0.8;
|
|
}
|
|
this.repInit = false;
|
|
}
|
|
}
|
|
|
|
endClickRepeat() {
|
|
this.repDoing = false;
|
|
}
|
|
|
|
onTouchStart(event) {
|
|
if (!this.mobile)
|
|
return;
|
|
this.endClickRepeat();
|
|
if (event.touches.length == 1) {
|
|
const touch = event.touches[0];
|
|
const rect = event.target.getBoundingClientRect();
|
|
const x = touch.pageX - rect.left;
|
|
const y = touch.pageY - rect.top;
|
|
if (this.handleClick(x, y)) {
|
|
this.repDoing = true;
|
|
this.debouncedStartClickRepeat(x, y);
|
|
}
|
|
}
|
|
}
|
|
|
|
onTouchEnd() {
|
|
if (!this.mobile)
|
|
return;
|
|
this.endClickRepeat();
|
|
}
|
|
|
|
onTouchCancel() {
|
|
if (!this.mobile)
|
|
return;
|
|
this.endClickRepeat();
|
|
}
|
|
|
|
onMouseDown(event) {
|
|
if (this.mobile)
|
|
return;
|
|
this.endClickRepeat();
|
|
if (event.button == 0) {
|
|
if (this.handleClick(event.offsetX, event.offsetY)) {
|
|
this.repDoing = true;
|
|
this.debouncedStartClickRepeat(event.offsetX, event.offsetY);
|
|
}
|
|
} else if (event.button == 2) {
|
|
this.doToolBarToggle();
|
|
}
|
|
}
|
|
|
|
onMouseUp() {
|
|
if (this.mobile)
|
|
return;
|
|
this.endClickRepeat();
|
|
}
|
|
|
|
onMouseWheel(event) {
|
|
if (this.mobile)
|
|
return;
|
|
if (event.deltaY > 0) {
|
|
this.doDown();
|
|
} else if (event.deltaY < 0) {
|
|
this.doUp();
|
|
}
|
|
}
|
|
|
|
onStatusBarClick() {
|
|
window.open(this.meta.url, '_blank');
|
|
}
|
|
|
|
handleClick(pointX, pointY) {
|
|
const mouseLegend = {
|
|
40: {30: 'PgUp', 100: 'PgDown'},
|
|
60: {40: 'Up', 60: 'Menu', 100: 'Down'},
|
|
100: {30: 'PgUp', 100: 'PgDown'}
|
|
};
|
|
|
|
const w = pointX/this.realWidth*100;
|
|
const h = pointY/this.realHeight*100;
|
|
|
|
let action = '';
|
|
loops: {
|
|
for (const x in mouseLegend) {
|
|
for (const y in mouseLegend[x]) {
|
|
if (w < x && h < y) {
|
|
action = mouseLegend[x][y];
|
|
break loops;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
switch (action) {
|
|
case 'Down' ://Down
|
|
this.doDown();
|
|
break;
|
|
case 'Up' ://Up
|
|
this.doUp();
|
|
break;
|
|
case 'PgDown' ://PgDown
|
|
this.doPageDown();
|
|
break;
|
|
case 'PgUp' ://PgUp
|
|
this.doPageUp();
|
|
break;
|
|
case 'Menu' :
|
|
this.doToolBarToggle();
|
|
break;
|
|
default :
|
|
// Nothing
|
|
}
|
|
|
|
return (action && action != 'Menu');
|
|
}
|
|
|
|
}
|
|
//-----------------------------------------------------------------------------
|
|
</script>
|
|
<style scoped>
|
|
.main {
|
|
flex: 1;
|
|
margin: 0;
|
|
padding: 0;
|
|
overflow: hidden;
|
|
position: relative;
|
|
}
|
|
|
|
.layout {
|
|
margin: 0;
|
|
padding: 0;
|
|
position: absolute;
|
|
z-index: 10;
|
|
}
|
|
|
|
.events {
|
|
z-index: 20;
|
|
background-color: rgba(0,0,0,0);
|
|
}
|
|
</style>
|