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'use strict';
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var isArray = require('./helpers').isArray;
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function groupDecorations(line) {
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var groups = [], currentGroup = null;
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for (var i = 0, l = line.inlines.length; i < l; i++) {
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var inline = line.inlines[i];
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var decoration = inline.decoration;
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if (!decoration) {
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currentGroup = null;
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continue;
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}
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if (!isArray(decoration)) {
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decoration = [decoration];
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}
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var color = inline.decorationColor || inline.color || 'black';
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var style = inline.decorationStyle || 'solid';
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for (var ii = 0, ll = decoration.length; ii < ll; ii++) {
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var decorationItem = decoration[ii];
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if (!currentGroup || decorationItem !== currentGroup.decoration ||
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style !== currentGroup.decorationStyle || color !== currentGroup.decorationColor) {
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currentGroup = {
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line: line,
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decoration: decorationItem,
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decorationColor: color,
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decorationStyle: style,
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inlines: [inline]
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};
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groups.push(currentGroup);
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} else {
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currentGroup.inlines.push(inline);
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}
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}
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}
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return groups;
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}
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function drawDecoration(group, x, y, pdfKitDoc) {
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function maxInline() {
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var max = 0;
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for (var i = 0, l = group.inlines.length; i < l; i++) {
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var inline = group.inlines[i];
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max = inline.fontSize > max ? i : max;
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}
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return group.inlines[max];
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}
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function width() {
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var sum = 0;
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for (var i = 0, l = group.inlines.length; i < l; i++) {
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var justifyShift = (group.inlines[i].justifyShift || 0);
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sum += group.inlines[i].width + justifyShift;
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}
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return sum;
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}
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var firstInline = group.inlines[0],
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biggerInline = maxInline(),
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totalWidth = width(),
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lineAscent = group.line.getAscenderHeight(),
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ascent = biggerInline.font.ascender / 1000 * biggerInline.fontSize,
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height = biggerInline.height,
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descent = height - ascent;
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var lw = 0.5 + Math.floor(Math.max(biggerInline.fontSize - 8, 0) / 2) * 0.12;
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switch (group.decoration) {
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case 'underline':
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y += lineAscent + descent * 0.45;
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break;
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case 'overline':
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y += lineAscent - (ascent * 0.85);
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break;
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case 'lineThrough':
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y += lineAscent - (ascent * 0.25);
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break;
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default:
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throw 'Unkown decoration : ' + group.decoration;
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}
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pdfKitDoc.save();
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if (group.decorationStyle === 'double') {
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var gap = Math.max(0.5, lw * 2);
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pdfKitDoc.fillColor(group.decorationColor)
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.rect(x + firstInline.x, y - lw / 2, totalWidth, lw / 2).fill()
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.rect(x + firstInline.x, y + gap - lw / 2, totalWidth, lw / 2).fill();
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} else if (group.decorationStyle === 'dashed') {
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var nbDashes = Math.ceil(totalWidth / (3.96 + 2.84));
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var rdx = x + firstInline.x;
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pdfKitDoc.rect(rdx, y, totalWidth, lw).clip();
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pdfKitDoc.fillColor(group.decorationColor);
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for (var i = 0; i < nbDashes; i++) {
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pdfKitDoc.rect(rdx, y - lw / 2, 3.96, lw).fill();
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rdx += 3.96 + 2.84;
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}
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} else if (group.decorationStyle === 'dotted') {
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var nbDots = Math.ceil(totalWidth / (lw * 3));
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var rx = x + firstInline.x;
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pdfKitDoc.rect(rx, y, totalWidth, lw).clip();
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pdfKitDoc.fillColor(group.decorationColor);
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for (var ii = 0; ii < nbDots; ii++) {
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pdfKitDoc.rect(rx, y - lw / 2, lw, lw).fill();
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rx += (lw * 3);
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}
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} else if (group.decorationStyle === 'wavy') {
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var sh = 0.7, sv = 1;
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var nbWaves = Math.ceil(totalWidth / (sh * 2)) + 1;
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var rwx = x + firstInline.x - 1;
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pdfKitDoc.rect(x + firstInline.x, y - sv, totalWidth, y + sv).clip();
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pdfKitDoc.lineWidth(0.24);
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pdfKitDoc.moveTo(rwx, y);
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for (var iii = 0; iii < nbWaves; iii++) {
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pdfKitDoc.bezierCurveTo(rwx + sh, y - sv, rwx + sh * 2, y - sv, rwx + sh * 3, y)
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.bezierCurveTo(rwx + sh * 4, y + sv, rwx + sh * 5, y + sv, rwx + sh * 6, y);
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rwx += sh * 6;
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}
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pdfKitDoc.stroke(group.decorationColor);
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} else {
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pdfKitDoc.fillColor(group.decorationColor)
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.rect(x + firstInline.x, y - lw / 2, totalWidth, lw)
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.fill();
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}
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pdfKitDoc.restore();
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}
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function drawDecorations(line, x, y, pdfKitDoc) {
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var groups = groupDecorations(line);
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for (var i = 0, l = groups.length; i < l; i++) {
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drawDecoration(groups[i], x, y, pdfKitDoc);
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}
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}
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function drawBackground(line, x, y, pdfKitDoc) {
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var height = line.getHeight();
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for (var i = 0, l = line.inlines.length; i < l; i++) {
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var inline = line.inlines[i];
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if (!inline.background) {
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continue;
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}
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var justifyShift = (inline.justifyShift || 0);
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pdfKitDoc.fillColor(inline.background)
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.rect(x + inline.x - justifyShift, y, inline.width + justifyShift, height)
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.fill();
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}
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}
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module.exports = {
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drawBackground: drawBackground,
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drawDecorations: drawDecorations
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};
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