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.. default-domain:: js
.. highlight:: javascript
Text
====
A Text object contains text. See the `Device.prototype.fillText`.
Constructors
------------
.. class:: Text()
Create a new empty text object.
.. code-block::
var text = new mupdf.Text()
Instance methods
----------------
.. method:: Text.prototype.getBounds(strokeState, transform)
Get the bounds of the instance.
:param StrokeState strokeState: The stroking state.
:param Matrix transform: The transformation matrix.
.. method:: Text.prototype.showGlyph(font, trm, gid, uni, wmode)
Add a glyph to the text object.
Transform is the text matrix, specifying font size and glyph location.
For example: ``[size, 0, 0, -size, x, y]``.
Glyph and unicode may be ``-1`` for n-to-m cluster mappings. For
example, the "fi" ligature would be added in two steps: first the glyph
for the 'fi' ligature and the unicode value for 'f'; then glyph ``-1``
and the unicode value for 'i'.
:param Font font: Font object.
:param Matrix trm: Transformation matrix.
:param number gid: Glyph id.
:param number uni: Unicode codepoint.
:param number wmode: ``0`` (default) for horizontal writing, and ``1`` for vertical writing.
.. code-block::
text.showGlyph(new mupdf.Font("Times-Roman"), mupdf.Matrix.identity, 21, 0x66, 0)
text.showGlyph(new mupdf.Font("Times-Roman"), mupdf.Matrix.identity, -1, 0x69, 0)
.. method:: Text.prototype.showString(font, trm, str, wmode)
Add a simple string to this Text object. Will do font substitution if the font does not have all the unicode characters required.
:param Font font: Font object.
:param Matrix trm: Transformation matrix.
:param string str: Content for Text object.
:param number wmode: ``0`` (default) for horizontal writing, and ``1`` for vertical writing.
.. code-block::
text.showString(new mupdf.Font("Times-Roman"), mupdf.Matrix.identity, "Hello World")
.. method:: Text.prototype.walk(walker)
:param TextWalker walker: Function with protocol methods, see example below for details.
.. code-block::
function print(...args) {
console.log(args.join(" "))
}
var textPrinter = {
beginSpan: function (f, m, wmode, bidi, dir, lang) {
print("beginSpan", f, m, wmode, bidi, dir, Q(lang))
},
showGlyph: function (f, m, g, u, v, b) { print("glyph", f, m, g, String.fromCodePoint(u), v, b) },
endSpan: function () { print("endSpan") }
}
var traceDevice = {
fillText: function (text, ctm, colorSpace, color, alpha) {
print("fillText", ctm, colorSpace, color, alpha)
text.walk(textPrinter)
},
clipText: function (text, ctm) {
print("clipText", ctm)
text.walk(textPrinter)
},
strokeText: function (text, stroke, ctm, colorSpace, color, alpha) {
print("strokeText", Q(stroke), ctm, colorSpace, color, alpha)
text.walk(textPrinter)
},
clipStrokeText: function (text, stroke, ctm) {
print("clipStrokeText", Q(stroke), ctm)
text.walk(textPrinter)
},
ignoreText: function (text, ctm) {
print("ignoreText", ctm)
text.walk(textPrinter)
}
}
var doc = mupdf.PDFDocument.openDocument(fs.readFileSync("test.pdf"), "application/pdf")
var page = doc.loadPage(0)
var device = new mupdf.Device(traceDevice)
page.run(device, mupdf.Matrix.identity)
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