-- Symbols that should have a different representation
local symbols = {
- [' '] = {repr = '\\obs '},
- ['_'] = {repr = '\\_'},
- ['->'] = {repr = '\\rightarrow'},
+ -- Note, the space we replace with is a Unicode non-breaking space
+ -- (U+00A0).
+ {symbol = ' ', repr = ' '},
+ {symbol = '_', repr = '\\_'},
+ {symbol = '->>', repr = '\\twoheadrightarrow'},
+ {symbol = '->', repr = '→'},
+ {symbol = '=>', repr = '⇒'},
-- The default * sits very high above the baseline, \ast (u+2217) looks
-- better.
- ['*'] = {repr = '\\ast'},
- ['~'] = {repr = '\\HDLine[width=.20 * \\the\\textwidth]'},
- ['|'] = {repr = '\\char' .. utf.byte('|')},
+ {symbol = '*', repr = '\\ast'},
+ {symbol = '~', repr = '\\HDLine[width=.20 * \\the\\textwidth]'},
+ {symbol = '|', repr = '\\char' .. utf.byte('|')},
+ -- Use ▶ and ∧ from our roman font, since Iwona doesn't have the glyph
+ {symbol = '▶', repr = '{\\rm{}▶}'},
+ --{symbol = '∧', repr = '{$∧$}'},
+ {symbol = '∧', repr = '{\\rm{}∧}'},
}
-- Keywords that should be bold
['letrec'] = {},
['letnonrec'] = {},
['in'] = {},
- ['DEFAULT'] = {},
+ ['DEFAULT'] = {small = true},
}
local in_block = 0
local bases = {}
-- Store the last line for each indent level
local indentlines = {}
--- The amount of indent of the first line, which we will strip of all
--- subsequent lines. This allows the entire block to be indented as normal in
--- the tex source code.
-local first_indent
+
+function array_concat(a1, a2)
+ local res = a1
+ for k,v in ipairs(a2) do
+ table.insert(res, v)
+ end
+ return res
+end
+
-- See if str starts with a symbol, and return the remaining string and that
-- symbol. If no symbol from the table is matched, just returns the first
-- character. We can do a lookup directly, since symbols can be different in
-- length, so we just loop over all symbols, trying them in turn.
local function take_symbol(str)
- for symbol,props in pairs(symbols) do
+ for i,props in ipairs(symbols) do
-- Try to remove symbol from the start of str
- symbol, newstr = utf.match(str, "^(" .. symbol .. ")(.*)")
+ symbol, newstr = utf.match(str, "^(" .. props.symbol .. ")(.*)")
if symbol then
-- Return this tokens repr, or just the token if it has no
-- repr.
-- the word taken.
local function take_word(str)
-- A word must always start with a-z (in particular, λ is not a valid
- -- start of a word).
- res, newstr = utf.match(str, "^([a-zA-Z][%a%d%+%-%,_]+)(.*)")
+ -- start of a word). A word must always end with a letter or a digit
+ res, newstr = utf.match(str, "^([a-zA-Z][%a%d%+%-%,_]*[%a%d]+)(.*)")
+ if not res then
+ -- The above does not catch single letter words
+ res, newstr = utf.match(str, "^([a-zA-Z])(.*)")
+ end
return res, newstr or str
end
submatches[#submatches+1] = "^(" .. base .. ")([%a%d])$"
-- Seconde, the base with a longer prefix that includes at least
-- one of +-, (to catch things like ri+1, but not return).
- submatches[#submatches+1] = "^(" .. base .. ")([%a%d]*[%-%+%,]+[%a%d%-%+%,]*)$"
+ submatches[#submatches+1] = "^(" .. base .. ")([%a%d]*[%-%+,]+[%a%d%-%+,]*)$"
end
end
return word
-- line4, and line is no longer in scope since it is replaced by line4.
local function do_indent(line)
newind, rest = utf.match(line, '^(%s*)(.*)')
-
- -- Store the first line's indent
- if not first_indent then
- first_indent = utf.len(newind)
- end
-
- -- Strip the indent of the first line from this line's indent.
- newind = utf.sub(newind, first_indent + 1)
- -- Rebuild line, so we can still use it below
- line = newind .. rest
-
prev = -1
-- Loop all the previous lines
for indent, unused in pairs(indentlines) do
if in_block == 0 then
-- Initially allow subscripts using _ or just appending a number (later,
-- we will add extra patterns here.
- submatches = {"^(%a*)_([%a%d,]+)$", "^(%a+)([%d,]+)$"}
+ submatches = {"^(%a*)_([%a%d,]+)$", "^(%a+)(%d[%d,]*)$"}
-- This stores all the bases we've encountered so far (to prevent
-- duplicates). For each of them there will be a pattern in submatches
-- above.
bases = {}
end
indentlines = {}
- first_indent = nil
end
vis.end_of_inline = vis.end_of_display
function vis.flush_line(str,nested)
- local result, state = { }, 0
- local finish, change = buffers.finish_state, buffers.change_state
- str = do_indent(str)
- -- Set the colorscheme, which is used by finish_state and change_state
- buffers.currentcolors = colors
+ buffers.flush_result(vis.do_line(str, false), nested)
+end
+
+function vis.do_line(str, no_indent)
+ local result = {}
+ if not no_indent then
+ -- Allow ignore of the indentation stuff when we're calling ourselves
+ -- for a partial line.
+ str = do_indent(str)
+ end
while str ~= "" do
local found = false
local word, symbol
- -- See if the next token is a word
- word, str = take_word(str)
- if word then
- if keywords[res] then
- -- Make all keywords bold
- word = "{\\bold " .. word .. "}"
+ local text, rest = utf.match(str, "^%-%-(.-)%-%-(.*)")
+ if text then
+ table.insert(result, '\\strikethrough{')
+ -- Recursively call ourselves to handle spaces gracefully.
+ result = array_concat(result, vis.do_line(text, true))
+ table.insert(result, '}')
+ -- Eat the processed characters
+ str = rest
+ elseif utf.match(str, "^%-%-") then
+ table.insert(result, '{\\italic{--')
+ -- Recursively call ourselves to handle spaces gracefully.
+ result = array_concat(result, vis.do_line(utf.sub(str, 3), true))
+ table.insert(result, '}}')
+ -- Done with this line
+ str = ''
+ else
+ -- See if the next token is a word
+ word, str = take_word(str)
+ if word then
+ if keywords[res] then
+ -- Make all keywords bold
+ word = "{\\bold " .. word .. "}"
+ if keywords[res].small then
+ word = "\\small" .. word -- Curlies were added above
+ end
+ else
+ -- Process any subscripts in the word
+ word = do_subscripts(word)
+ end
+ table.insert(result, word)
else
- -- Process any subscripts in the word
- word = do_subscripts(word)
+ -- The next token is not a word, it must be a symbol
+ symbol, str = take_symbol(str)
+ table.insert(result, symbol)
end
- else
- -- The next token is not a word, it must be a symbol
- symbol, str = take_symbol(str)
end
-
- -- Append the resulting token
- result[#result+1] = word or symbol
end
-
- state = finish(state, result)
- buffers.flush_result(result,nested)
+
+ return result
end
-- vim: set sw=4 sts=4 expandtab ai:
projects / matthijs / master-project / report.git / blobdiff