Files
liberama/client/components/Reader/TextPage/TextPage.vue
2019-01-26 11:12:54 +07:00

767 lines
24 KiB
Vue

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