pdfkit
Version:
A PDF generation library for Node.js
250 lines (244 loc) • 8.78 kB
JavaScript
(function() {
var WORD_RE;
WORD_RE = /([^ ,\/!.?:;\-\n]+[ ,\/!.?:;\-]*)|\n/g;
module.exports = {
initText: function() {
this.x = 0;
this.y = 0;
this._lineGap = 0;
this._textState = {
mode: 0,
wordSpacing: 0,
characterSpacing: 0
};
return this._wrapState = {};
},
lineGap: function(_lineGap) {
this._lineGap = _lineGap;
return this;
},
_initOptions: function(x, y, options) {
var margins, _ref, _ref2, _ref3;
if (x == null) x = {};
if (options == null) options = {};
if (typeof x === 'object') {
options = x;
x = null;
}
options = (function() {
var k, opts, v;
opts = {};
for (k in options) {
v = options[k];
opts[k] = v;
}
return opts;
})();
if ((x != null) || (y != null)) {
this.x = x || this.x;
this.y = y || this.y;
} else {
margins = this.page.margins;
if ((_ref = options.width) == null) {
options.width = this.page.width - this.x - margins.right;
}
if ((_ref2 = options.height) == null) {
options.height = this.page.height - this.y - margins.bottom;
}
}
options.columns || (options.columns = 1);
if ((_ref3 = options.columnGap) == null) options.columnGap = 18;
return options;
},
text: function(text, x, y, options) {
var line, match, matches, paragraphs, _i, _j, _len, _len2;
if (x == null) x = {};
if (options == null) options = {};
options = this._initOptions(x, y, options);
text = '' + text;
if (options.wordSpacing) text = text.replace(/\s+/g, ' ');
paragraphs = text.split('\n');
if (options.width) {
this._wrap(paragraphs, options);
} else {
for (_i = 0, _len = paragraphs.length; _i < _len; _i++) {
line = paragraphs[_i];
this._line(line, options);
}
}
return this;
if (options.width) {
this._wrap(text, options);
} else if ((matches = text.split('\n')).length > 1) {
for (_j = 0, _len2 = matches.length; _j < _len2; _j++) {
match = matches[_j];
this._line(match, options);
}
} else {
this._line(text, options);
}
return this;
},
moveDown: function(lines) {
if (lines == null) lines = 1;
this.y += this.currentLineHeight(true) * lines + this._lineGap;
return this;
},
moveUp: function(lines) {
if (lines == null) lines = 1;
this.y -= this.currentLineHeight(true) * lines + this._lineGap;
return this;
},
list: function(array, x, y, options) {
var i, item, r, _len;
if (x == null) x = {};
if (options == null) options = {};
options = this._initOptions(x, y, options);
r = ((this._font.ascender / 1000 * this._fontSize) / 3) | 0;
this.x += r * 6;
options.listType = 'bullet';
this._wrap(array, options);
return;
for (i = 0, _len = array.length; i < _len; i++) {
item = array[i];
this.circle(this.x - r * 5, this.y + r * 2 + 1, r);
this.text(item, options);
this.y += options.paragraphGap || 0;
}
this.x = x;
return this.fill();
/*
gap = Math.round (@_font.ascender / 1000 * @_fontSize) / 2
@x = x = ox or @x
@y = y = oy or @y
for item in array
@circle x + 3, @y + gap + 3, 3
@text item, x + 15
@y += 3
@x = x
@fill()
*/
},
_line: function(text, options) {
var lineGap, paragraphGap, wrap;
wrap = this._wrapState;
paragraphGap = (wrap.firstLine && this.y !== wrap.startY && options.paragraphGap) || 0;
lineGap = options.lineGap || this._lineGap || 0;
this._fragment(text, this.x, this.y + paragraphGap, options);
return this.y += this.currentLineHeight(true) + lineGap + paragraphGap;
},
_fragment: function(text, x, y, options) {
var align, characterSpacing, i, indent, lineWidth, mode, state, textWidth, wordSpacing, words, wrap, _base, _name, _ref;
if (options == null) options = {};
text = '' + text;
if (text.length === 0) return;
state = this._textState;
wrap = this._wrapState;
align = options.align || 'left';
indent = (wrap.firstLine && options.indent) || 0;
wordSpacing = options.wordSpacing || 0;
characterSpacing = options.characterSpacing || 0;
if (options.width) {
lineWidth = wrap.lineWidth - indent - wrap.extraSpace;
switch (align) {
case 'right':
x += lineWidth - this.widthOfString(text);
break;
case 'center':
x += lineWidth / 2 - this.widthOfString(text) / 2;
break;
case 'justify':
if (wrap.lastLine) break;
words = text.match(WORD_RE);
if (!words) break;
textWidth = this.widthOfString(text.replace(/\s+/g, ''));
wordSpacing = (lineWidth - textWidth) / (words.length - 1) - this.widthOfString(' ');
}
}
x += indent;
y = this.page.height - y - (this._font.ascender / 1000 * this._fontSize);
if ((_ref = (_base = this.page.fonts)[_name = this._font.id]) == null) {
_base[_name] = this._font.ref;
}
this._font.use(text);
text = this._font.encode(text);
text = ((function() {
var _ref2, _results;
_results = [];
for (i = 0, _ref2 = text.length; 0 <= _ref2 ? i < _ref2 : i > _ref2; 0 <= _ref2 ? i++ : i--) {
_results.push(text.charCodeAt(i).toString(16));
}
return _results;
})()).join('');
this.addContent("BT");
this.addContent("" + x + " " + y + " Td");
this.addContent("/" + this._font.id + " " + this._fontSize + " Tf");
mode = options.fill && options.stroke ? 2 : options.stroke ? 1 : 0;
if (mode !== state.mode) this.addContent("" + mode + " Tr");
if (wordSpacing !== state.wordSpacing) this.addContent(wordSpacing + ' Tw');
if (characterSpacing !== state.characterSpacing) {
this.addContent(characterSpacing + ' Tc');
}
this.addContent("<" + text + "> Tj");
this.addContent("ET");
state.mode = mode;
return state.wordSpacing = wordSpacing;
},
_wrap: function(paragraphs, options) {
var buffer, i, indent, len, lineWidth, nextY, spaceLeft, text, w, width, word, wordWidths, words, wrap, _i, _len, _len2, _ref;
wrap = this._wrapState;
width = this.widthOfString.bind(this);
indent = options.indent || 0;
lineWidth = (options.width - (options.columnGap * (options.columns - 1))) / options.columns;
wrap.column = 1;
wrap.startY = this.y;
wrap.lineWidth = lineWidth;
wrap.firstLine = true;
wrap.lastLine = false;
wrap.maxY = this.y + options.height - this.currentLineHeight();
for (_i = 0, _len = paragraphs.length; _i < _len; _i++) {
text = paragraphs[_i];
wrap.firstLine = true;
words = text.match(WORD_RE);
wrap.extraSpace = (options.wordSpacing || 0) * (words.length - 1) + (options.characterSpacing || 0) * (text.length - 1);
spaceLeft = lineWidth - indent - wrap.extraSpace;
wordWidths = {};
len = words.length;
buffer = '';
for (i = 0, _len2 = words.length; i < _len2; i++) {
word = words[i];
w = (_ref = wordWidths[word]) != null ? _ref : wordWidths[word] = width(word);
if (w > spaceLeft) {
this._line(buffer.trim(), options);
wrap.firstLine = false;
nextY = this.y + this.currentLineHeight(true);
if (this.y > wrap.maxY || (wrap.lastLine && nextY > wrap.maxY)) {
this._nextSection(options);
}
spaceLeft = lineWidth - w - wrap.extraSpace;
buffer = word === '\n' ? '' : word;
} else {
spaceLeft -= w;
buffer += word;
}
}
wrap.lastLine = true;
this._line(buffer.trim(), options);
}
return this._wrapState = {};
},
_nextSection: function(options) {
var wrap;
wrap = this._wrapState;
if (++wrap.column > options.columns) {
this.addPage();
wrap.column = 1;
wrap.startY = this.page.margins.top;
return wrap.maxY = this.page.maxY();
} else {
this.x += wrap.lineWidth + options.columnGap;
return this.y = wrap.startY;
}
}
};
}).call(this);