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