100798847b
Summary:
Make delimiter sizing work. This involved
- Adding the symbols for the remaining delimiters (like `\lfloor` and `\{`)
- Adding metrics for the size1, size2, size3, and size4 fonts
- Parsing delimiter sizing functions
- Using the big fonts when possible, otherwise building large copies of the
delimiters from scratch
Test Plan:
- See that
`\bigl\uparrow\Bigl\downarrow\biggl\updownarrow\Biggl\Uparrow
\Biggr\Downarrow\biggr\Updownarrow\bigm/\Bigm\backslash\biggm|
\Biggm|\big\lceil\Big\rceil\bigg\langle\Bigg\rangle\bigl(\Bigl)
\biggl[\Biggl]\Biggr\{\biggr\}\Bigr\lfloor\bigr\rfloor`
parses correctly (this contains all of the delimiters, and all of the sizing
modes)
- See that the huxley tests didn't change, and the new one looks good
- See the normal tests work
Reviewers: alpert
Reviewed By: alpert
Differential Revision: http://phabricator.khanacademy.org/D7844
48 lines
1.0 KiB
Ruby
48 lines
1.0 KiB
Ruby
require 'json'
|
|
|
|
require 'rubygems'
|
|
|
|
require 'ttfunk'
|
|
|
|
def metrics_for_file(filename)
|
|
file = TTFunk::File.open(filename)
|
|
per_em = 1.0 * file.header.units_per_em
|
|
|
|
chars = {}
|
|
|
|
file.cmap.unicode[0].code_map.sort.each do |u, g|
|
|
horiz = file.horizontal_metrics.for(g)
|
|
|
|
# width = (horiz.advance_width / per_em).round(3)
|
|
height = 0
|
|
depth = 0
|
|
italic = 0
|
|
|
|
glyph = file.glyph_outlines.for(g)
|
|
if glyph
|
|
height = (glyph.y_max / per_em).round(3)
|
|
depth = (-glyph.y_min / per_em).round(3)
|
|
italic = [0, (glyph.x_max - horiz.advance_width) / per_em].max.round(3)
|
|
end
|
|
|
|
chars[u] = {
|
|
# :width => width,
|
|
:height => height,
|
|
:depth => depth,
|
|
:italic => italic,
|
|
}
|
|
end
|
|
|
|
chars
|
|
end
|
|
|
|
font_dir = File.join(File.dirname(__FILE__), 'static/fonts/')
|
|
metrics = {}
|
|
|
|
%w[main-regular math-italic ams-regular
|
|
size1-regular size2-regular size3-regular size4-regular].each do |face|
|
|
metrics[face] = metrics_for_file(File.join(font_dir, 'katex_%s.ttf' % face))
|
|
end
|
|
|
|
puts "var metricMap = %s;" % metrics.to_json
|