216 lines
8.4 KiB
JavaScript
216 lines
8.4 KiB
JavaScript
export default class DrawHelper {
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fontBySize(size) {
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return `${size}px ${this.fontName}`;
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}
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fontByStyle(style) {
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return `${style.italic ? 'italic' : this.fontStyle} ${style.bold ? 'bold' : this.fontWeight} ${this.fontSize}px ${this.fontName}`;
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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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drawPage(lines) {
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if (!this.lastBook || this.pageLineCount < 1 || !this.book || !lines || !this.parsed.textLength)
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return '';
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const spaceWidth = this.measureText(' ', {});
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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}">`;
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let len = lines.length;
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len = (len > this.pageLineCount + 1 ? this.pageLineCount + 1 : len);
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let y = this.fontSize*this.textShift;
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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 = 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;
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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 j = 0; j < partWords.length; j++) {
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let f = font;
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let style = part.style;
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let word = partWords[j];
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if (i == 0 && this.searching && word.toLowerCase().indexOf(this.needle) >= 0) {
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style = Object.assign({}, part.style, {bold: true});
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f = this.fontByStyle(style);
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}
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out += this.fillText(word, x, y, f);
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x += this.measureText(word, style) + (j < 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.w - this.measureText(lineText, centerStyle))/2 : x);
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for (const part of line.parts) {
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let font = this.fontByStyle(part.style);
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if (i == 0 && this.searching) {//для поиска, разбивка по словам
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let partWords = part.text.split(' ');
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for (let j = 0; j < partWords.length; j++) {
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let f = font;
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let style = part.style;
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let word = partWords[j];
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if (word.toLowerCase().indexOf(this.needle) >= 0) {
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style = Object.assign({}, part.style, {bold: true});
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f = this.fontByStyle(style);
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}
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out += this.fillText(word, x, y, f);
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x += this.measureText(word, style) + (j < partWords.length - 1 ? spaceWidth : 0);
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}
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} else {
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out += this.fillText(part.text, x, y, font);
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x += this.measureText(part.text, part.style);
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}
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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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drawPercentBar(x, y, w, h, font, fontSize, bookPos, textLength) {
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const pad = 3;
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const fh = h - 2*pad;
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const fh2 = fh/2;
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const t1 = `${Math.floor((bookPos + 1)/1000)}k/${Math.floor(textLength/1000)}k`;
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const w1 = this.measureTextFont(t1, font) + fh2;
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const read = (bookPos + 1)/textLength;
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const t2 = `${(read*100).toFixed(2)}%`;
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const w2 = this.measureTextFont(t2, font);
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let w3 = w - w1 - w2;
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let out = '';
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if (w1 + w2 <= w)
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out += this.fillTextShift(t1, x, y, font, fontSize);
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if (w1 + w2 + w3 <= w && w3 > (10 + fh2)) {
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const barWidth = w - w1 - w2 - fh2;
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out += this.strokeRect(x + w1, y + pad, barWidth, fh - 2, this.statusBarColor);
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out += this.fillRect(x + w1 + 2, y + pad + 2, (barWidth - 4)*read, fh - 6, this.statusBarColor);
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}
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if (w1 <= w)
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out += this.fillTextShift(t2, x + w1 + w3, y, font, fontSize);
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return out;
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}
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drawStatusBar(statusBarTop, statusBarHeight, bookPos, textLength, title) {
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let out = `<div class="layout" style="` +
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`width: ${this.realWidth}px; height: ${statusBarHeight}px; ` +
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`color: ${this.statusBarColor}">`;
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const fontSize = statusBarHeight*0.75;
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const font = 'bold ' + this.fontBySize(fontSize);
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out += this.fillRect(0, (statusBarTop ? statusBarHeight : 0), this.realWidth, 1, this.statusBarColor);
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const date = new Date();
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const time = `${date.getHours().toString().padStart(2, '0')}:${date.getMinutes().toString().padStart(2, '0')}`;
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const timeW = this.measureTextFont(time, font);
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out += this.fillTextShift(time, this.realWidth - timeW - fontSize, 2, font, fontSize);
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out += this.fillTextShift(this.fittingString(title, this.realWidth/2 - fontSize - 3, font), fontSize, 2, font, fontSize);
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out += this.drawPercentBar(this.realWidth/2, 2, this.realWidth/2 - timeW - 2*fontSize, statusBarHeight, font, fontSize, bookPos, textLength);
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out += '</div>';
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return out;
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}
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statusBarClickable(statusBarTop, statusBarHeight) {
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return `<div class="layout" style="position: absolute; ` +
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`left: 0px; top: ${statusBarTop ? 1 : this.realHeight - statusBarHeight + 1}px; ` +
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`width: ${this.realWidth/2}px; height: ${statusBarHeight}px; cursor: pointer"></div>`;
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}
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fittingString(str, maxWidth, font) {
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let w = this.measureTextFont(str, font);
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const ellipsis = '…';
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const ellipsisWidth = this.measureTextFont(ellipsis, font);
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if (w <= maxWidth || w <= ellipsisWidth) {
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return str;
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} else {
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let len = str.length;
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while (w >= maxWidth - ellipsisWidth && len-- > 0) {
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str = str.substring(0, len);
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w = this.measureTextFont(str, font);
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}
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return str + ellipsis;
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}
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}
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fillTextShift(text, x, y, font, size, css) {
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return this.fillText(text, x, y + size*this.fontShift, font, css);
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}
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fillText(text, x, y, font, css) {
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css = (css ? css : '');
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return `<div style="position: absolute; white-space: pre; left: ${x}px; top: ${y}px; font: ${font}; ${css}">${text}</div>`;
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}
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fillRect(x, y, w, h, color) {
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return `<div style="position: absolute; left: ${x}px; top: ${y}px; ` +
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`width: ${w}px; height: ${h}px; background-color: ${color}"></div>`;
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}
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strokeRect(x, y, w, h, color) {
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return `<div style="position: absolute; left: ${x}px; top: ${y}px; ` +
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`width: ${w}px; height: ${h}px; box-sizing: border-box; border: 1px solid ${color}"></div>`;
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}
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} |