diff options
Diffstat (limited to 'Master/texmf-dist/tex/lualatex')
-rw-r--r-- | Master/texmf-dist/tex/lualatex/showkerning/showkerning.lua | 208 | ||||
-rw-r--r-- | Master/texmf-dist/tex/lualatex/showkerning/showkerning.sty | 24 |
2 files changed, 232 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/lualatex/showkerning/showkerning.lua b/Master/texmf-dist/tex/lualatex/showkerning/showkerning.lua new file mode 100644 index 00000000000..5c7faf3f6a0 --- /dev/null +++ b/Master/texmf-dist/tex/lualatex/showkerning/showkerning.lua @@ -0,0 +1,208 @@ +-- Copyright (c) 2022 Thomas Kelkel kelkel@emaileon.de + +-- This file may be distributed and/or modified under the +-- conditions of the LaTeX Project Public License, either +-- version 1.3c of this license or (at your option) any later +-- version. The latest version of this license is in + +-- http://www.latex-project.org/lppl.txt + +-- and version 1.3c or later is part of all distributions of +-- LaTeX version 2009/09/24 or later. + +-- Version: 0.1 + +local FLOOR = math.floor +local ABS = math.abs + +local function round ( num, dec ) + return FLOOR ( num * 10^dec + 0.5 ) / 10^dec +end + +local ID = node.id +local GLYPH = ID ( "glyph" ) +local DISC = ID ( "disc" ) +local KERN = ID ( "kern" ) +local GLUE = ID ( "glue" ) +local BOUND = ID ( "boundary" ) +local WI = ID ( "whatsit" ) +local HLIST = ID ( "hlist" ) +local VLIST = ID ( "vlist" ) +local USERKERN = table.swapped ( node.subtypes ("kern") )["userkern"] +local NEW = node.new +local COPY = node.copy +local REM = node.remove +local PREV = node.prev +local NEXT = node.next +local TAIL = node.tail +local HAS_GLYPH = node.has_glyph +local INS_B = node.insert_before +local INS_A = node.insert_after +local T = node.traverse +local T_ID = node.traverse_id +local T_GLYPH = node.traverse_glyph +local WIS = node.whatsits() +local pdfliteral +local pairs = pairs +local ATC = luatexbase.add_to_callback + +local on_top = false +local DIR = PREV +local AB = INS_B +local f = 1 + +for key, value in pairs ( WIS ) do + if value == "pdf_literal" then + pdfliteral = key + end +end + +function showkerning_on_top () + on_top = true + DIR = NEXT + AB = INS_A + f = - 1 +end + +local function calc_value ( value ) + value = round ( value / 65536, 3 ) + return value +end + +local function find_glyph ( n, d ) + if d ( n ) then + n = d ( n ) + while n.id ~= GLYPH and not ( n.id == DISC and n.replace and HAS_GLYPH ( n.replace ) ) do + if not d ( n ) or n.id == GLUE or n.id == BOUND or ( n.id == KERN and n.subtype == USERKERN ) then return false end + n = d ( n ) + end + else + return false + end + local return_value = n + if n.id == DISC then + for glyph_node in T_GLYPH ( n.replace ) do + return_value = glyph_node + end + end + return return_value, n +end + +local function check_glyph ( n, d, has_prev_next_glyph, prev_next_glyph, insert_prev_next ) + if find_glyph ( n, d ) then + prev_next_glyph, insert_prev_next = find_glyph ( n, d ) + has_prev_next_glyph = true + end + return has_prev_next_glyph, prev_next_glyph, insert_prev_next +end + +local function get_x_value ( n, x_value ) + local exp_fac = 1 + if n.expansion_factor then + exp_fac = n.expansion_factor / 1000000 + 1 + end + if n.id == GLYPH and n.width then + x_value = x_value + calc_value ( n.width ) * exp_fac + elseif n.id == KERN and n.kern then + x_value = x_value + calc_value ( n.kern ) * exp_fac + end + return x_value +end + +local function make_rule ( head, n, kern_node, current_head, disc_list ) + local color = "0 0 0" + local has_prev_glyph = false + local has_next_glyph = false + local prev_glyph = n + local next_glyph = n + local insert_prev = n + local insert_next = n + local insert_point = n + local x_value = 0 + local height = 0 + local depth = 0 + local thickness = calc_value ( kern_node.kern ) + has_prev_glyph, prev_glyph, insert_prev = check_glyph ( n, PREV, has_prev_glyph, prev_glyph, insert_prev ) + has_next_glyph, next_glyph, insert_next = check_glyph ( n, NEXT, has_next_glyph, next_glyph, insert_next ) + if not on_top and has_prev_glyph then + insert_point = insert_prev + x_value = get_x_value ( prev_glyph, x_value ) + if disc_list and HAS_GLYPH ( current_head ) and TAIL ( current_head ) == kern_node then + for some_node in T ( current_head ) do + if some_node == TAIL ( current_head ) then break end + x_value = get_x_value ( some_node, x_value ) + end + end + elseif on_top and has_next_glyph then + insert_point = insert_next + x_value = get_x_value ( next_glyph, x_value ) + if disc_list and HAS_GLYPH ( current_head ) and current_head == kern_node then + for some_node in T ( current_head ) do + if some_node ~= current_head then + x_value = get_x_value ( some_node, x_value ) + end + end + end + end + if disc_list and HAS_GLYPH ( current_head ) then + if TAIL ( current_head ) == kern_node then + has_prev_glyph = false + has_prev_glyph, prev_glyph = check_glyph ( kern_node, PREV, has_prev_glyph, prev_glyph, insert_prev ) + end + if current_head == kern_node then + has_next_glyph = false + has_next_glyph, next_glyph = check_glyph ( kern_node, NEXT, has_next_glyph, next_glyph, insert_next ) + end + end + if has_prev_glyph then + height = calc_value ( prev_glyph.height ) + depth = calc_value ( prev_glyph.depth ) + if has_next_glyph then + if next_glyph.height > prev_glyph.height then height = calc_value ( next_glyph.height ) end + if next_glyph.depth > prev_glyph.depth then depth = calc_value ( next_glyph.depth ) end + end + elseif has_next_glyph then + height = calc_value ( next_glyph.height ) + depth = calc_value ( next_glyph.depth ) + end + if PREV ( kern_node ) and PREV ( kern_node ).id == KERN then + thickness = get_x_value ( PREV ( kern_node ), thickness ) + if PREV ( PREV ( kern_node ) ) and PREV ( PREV ( kern_node ) ).id == KERN then + thickness = get_x_value ( PREV ( PREV ( kern_node ) ), thickness ) + end + end + if ( thickness ~= 0 ) and ( thickness > calc_value ( tex.hsize ) * - 1 ) then + head = AB ( head, insert_point, NEW ( WI, pdfliteral ) ) + if thickness > 0 then + color = "0 1 0" + else + color = "1 0 0" + end + x_value = ( x_value + calc_value ( kern_node.expansion_factor ) + thickness * 0.5 ) * f + DIR ( insert_point ).mode = 0 + DIR ( insert_point ).data = "q " .. ABS ( thickness ) .. " w " .. x_value .. " " .. - depth .. " m " .. x_value .. " " .. height .. " l " .. color .. " RG S Q" + end + return head, current_head +end + +local function show_kerns ( head ) + for n in T ( head ) do + if n.id == HLIST or n.id == VLIST then + n.head = show_kerns ( n.head ) + elseif n.id == KERN and not ( NEXT ( n ) and NEXT ( n ).id == KERN ) then + head = make_rule ( head, n, n, head, false ) + elseif n.replace then + local REPLACE = n.replace + for kern_node in T_ID ( KERN, REPLACE ) do + if not ( n.subtype == USERKERN ) and not ( NEXT ( kern_node ) and NEXT ( kern_node ).id == KERN ) then + head, REPLACE = make_rule ( head , n, kern_node, REPLACE, true ) + end + end + n.replace = REPLACE + end + end + return head +end + +ATC ( "post_linebreak_filter", show_kerns, "show kerns in postline" ) +ATC ( "hpack_filter", show_kerns, "show kerns in hpack" )
\ No newline at end of file diff --git a/Master/texmf-dist/tex/lualatex/showkerning/showkerning.sty b/Master/texmf-dist/tex/lualatex/showkerning/showkerning.sty new file mode 100644 index 00000000000..0d5cd0cff9f --- /dev/null +++ b/Master/texmf-dist/tex/lualatex/showkerning/showkerning.sty @@ -0,0 +1,24 @@ +% Copyright (c) 2022 Thomas Kelkel kelkel@emaileon.de + +% This file may be distributed and/or modified under the +% conditions of the LaTeX Project Public License, either +% version 1.3c of this license or (at your option) any later +% version. The latest version of this license is in + +% http://www.latex-project.org/lppl.txt + +% and version 1.3c or later is part of all distributions of +% LaTeX version 2009/09/24 or later. + +\ProvidesPackage{showkerning}[2022/04/17 v0.1 Showing kerns in a document] +\RequirePackage{ifluatex,luatexbase} + +\ifluatex + \directlua{require ( "showkerning.lua" )} + + \DeclareOption{ontop}{\directlua{showkerning_on_top()}} + \ProcessOptions +\else + \errhelp{Compile with LuaLaTeX to be able to use the "showkerning" package.} + \errmessage{Package "showkerning" error: This package requires LuaLaTeX!} +\fi
\ No newline at end of file |