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%- $Id$
%-----------------------------------------------------------------------------
%- P. Wessel, version 1
%- Text justification for paragraphs.
%- Kept as separate file until stable.
%- Knows about flush l,c,r and justified.
%- Knows about all GMT @ escapes, composites,
%- and underlining. No hyphenation. 1 page only.
%-----------------------------------------------------------------------------
/PSL_setfont { % Set Font, size, and color if needed
/f exch def % Gets word flag from stack
/k1 exch def % Gets word index from stack
/fz PSL_size k1 get def % Get font size
/fn PSL_fnt k1 get def % Get font
fn PSL_lastfn eq fz PSL_lastfz eq and not {
fz PSL_fontname fn get Y % Set font and size
/PSL_lastfn fn def
/PSL_lastfz fz def
} if
/fc PSL_color k1 get def
fc PSL_lastfc ne {
/PSL_c fc 3 mul def
0 1 2 {PSL_c add PSL_rgb exch get} for C % Get and set color
/PSL_lastfc fc def
} if
f 32 and 32 eq { % Underline
/PSL_UL fz 0.075 mul def
fz 0.025 mul W
/PSL_show {PSL_ushow} def
}
{
/PSL_show {ashow} def
} ifelse
}!
/PSL_setfont2 { % Only set font and size
/f exch def % Gets word flag from stack
/k1 exch def % Gets word index from stack
/fz PSL_size k1 get def % Get font size
/fn PSL_fnt k1 get def % Get font
fn PSL_lastfn eq fz PSL_lastfz eq and not {
fz PSL_fontname fn get Y % Set font and size
/PSL_lastfn fn def
/PSL_lastfz fz def
} if
}!
/PSL_wordheight { % Gets word from stack, and calculates any adjustment to box height
0 0 M false charpath flattenpath pathbbox /up exch def pop /down exch def pop newpath
down PSL_ymin lt {/PSL_ymin down def} if
up PSL_ymax gt {/PSL_ymax up def} if
}!
/PSL_ushow {
currentpoint /y0 exch def /x0 exch def
ashow
currentpoint pop /x1 exch def
x0 y0 PSL_UL sub M x1 y0 PSL_UL sub L S
x1 y0 M
}!
% Set font, size, and color. Adjust baseline if needed. Place space and word
/PSL_placeword {
/k exch def % Gets word index from stack
/flag PSL_flag k get def
k flag PSL_setfont
/sshow {ashow} def
PSL_col 0 eq { % First word on a line
/PSL_t 0 def % 0 spaces before this word
flag 4 and 4 eq { % Must skip one TAB
pr_char 0 ( ) ashow
} if
}
{ % Need to find spaces before this word
/f PSL_flag k 1 sub get def % f is flag for previous word
/PSL_t f 3 and def % PSL_t is index into PSL_spaces and PSL_spacewidths for previous word
f 32 and 32 eq flag 32 and 32 eq and {/sshow {PSL_ushow} def} if
} ifelse
/thisword_bshift PSL_bshift k get def % The baseline shift
thisword_bshift 0.0 ne {0 thisword_bshift G} if % Shift baseline
flag 8 and 8 eq { % First composite char
pr_char 0 PSL_spaces PSL_t get sshow
k PSL_composite
} if
flag 24 and 0 eq { % Anything but composite chars
pr_char 0 PSL_spaces PSL_t get sshow pr_char 0 PSL_word k get PSL_show
PSL_width k get 0 gt {/PSL_col PSL_col 1 add def} if
} if
thisword_bshift 0.0 ne {0 thisword_bshift neg G} if % Shift baseline
}!
/PSL_composite { % Place a composite character
/k1 exch def % Get word index from stack
/k2 k1 1 add def
/char1 PSL_word k1 get def
/char2 PSL_word k2 get def
/w1 char1 stringwidth pop def
/w2 char2 stringwidth pop def
/delta w1 w2 sub 2 div PSL_scale mul def
delta 0.0 gt {
/dx1 0 def
/dx2 delta def
}
{ /dx1 delta neg def
/dx2 0 def
} ifelse
dx1 0 G currentpoint
pr_char 0 char1 PSL_show M
delta 0 G
pr_char 0 char2 ashow
dx2 0 G
}!
% Determine how much to expand text and also justify left/center/right
/PSL_expand {
/k1 exch def % Get word index from stack
/extra PSL_parwidth previous_linewidth sub comp_width add def
PSL_CRLF k1 PSL_n1 eq or {/spread 0 def} {/spread extra def} ifelse
/PSL_scale previous_linewidth 0.0 gt {PSL_parwidth previous_linewidth div} {1.0} ifelse def
/ndiv lsum ncomp sub def
ndiv 0 eq {/ndiv 1 def} if
PSL_parjust 4 eq {/pr_char spread ndiv div def} {/pr_char 0 def} ifelse
PSL_parjust 2 eq {extra 2 div 0 G} if
PSL_parjust 3 eq {extra 0 G} if
/PSL_col 0 def
}!
% Calculate text paragraph height:
/PSL_textjustifier {
/PSL_mode exch def % From stack. 0 -> calculate height, no text is placed, 1 -> place text
/PSL_col 0 def
/PSL_ybase 0 def
/PSL_parheight 0 def
/PSL_ymin 0 def
/PSL_ymax 0 def
/PSL_top 0 def
/PSL_bottom 0 def
/last_font PSL_fnt 0 get def % The previous font number
/last_size PSL_size 0 get def % The previous font size
/last_color PSL_color 0 get def % The previous color index
/previous_linewidth 0 def
/stop 0 def
/start 0 def
/lsum 0 def
/line 0 def
/ncomp 0 def
/comp_width 0 def
0 1 PSL_n1 { % Loop over all the words
/i exch def % The current loop index
/thisflag PSL_flag i get def % # of space chars to follow this word
i 0 eq {
/PSL_t 0 def
/lastflag 0 def
}
{ /lastflag PSL_flag i 1 sub get def
/PSL_t lastflag 3 and def
} ifelse
% PSL_t is index into PSL_spaces and PSL_spacewidths
i thisflag PSL_setfont2 % Get and set font and size
/thisword_width PSL_width i get def
/comp_add 0 def
/compw_add 0 def
/PSL_tabwidth ( ) stringwidth pop def % Get width of the TAB
/PSL_spacewidths PSL_spaces {stringwidth pop} forall 3 array astore def % and the spaces
/ccount PSL_count i get def % # of characters in this word
thisflag 4 and 4 eq { % Had leading tab
/thisword_width thisword_width PSL_tabwidth add def
/ccount ccount 4 add def
} if
lastflag 8 and 8 eq {/PSL_t 0 def /comp_add 1 def /compw_add thisword_width def} if
/new_linewidth previous_linewidth thisword_width add PSL_spacewidths PSL_t get add def % Width of line if word added
/PSL_CRLF thisword_width 0.0 eq thisflag 16 and 0 eq and def
/special thisflag 16 and 16 eq {true} {thisword_width 0.0 gt} ifelse def
new_linewidth PSL_parwidth le special and
{ % Word will fit on current line
PSL_col 0 eq {
/PSL_ymin 0 def
/PSL_ymax 0 def
} if
/stop stop 1 add def % Include this word
/PSL_col PSL_col 1 add def % Column place of next word
/previous_linewidth new_linewidth def % Update the unadjusted line width
/lsum lsum ccount add PSL_t add def % Update character count
/ncomp ncomp comp_add add def
/comp_width comp_width compw_add add def
}
{ % Must process current line and move to next
1 PSL_mode eq { % Write out the first word on this line
% Determine how much to expand text and also justify left/center/right
start PSL_expand
start PSL_placeword
}
{PSL_word start get PSL_wordheight
} ifelse
/last stop 1 sub def
/start start 1 add def
1 PSL_mode eq { % Write out the remaining words on this line
start 1 last {PSL_placeword} for
}
{start 1 last {PSL_word exch get PSL_wordheight} for
line 0 eq { /PSL_top PSL_ymax def} if % First outputline
} ifelse
/start stop def
/PSL_ybase PSL_ybase PSL_linespace sub def
1 PSL_mode eq {0 PSL_ybase M} if % CR/LF
/stop stop 1 add def % Include this word
/previous_linewidth thisword_width def
/lsum ccount def
/ncomp comp_add def
/comp_width compw_add def
/PSL_col 0 def
/line line 1 add def
} ifelse
} for
/last stop 1 sub def
last PSL_n lt { % One or more words left hanging on last line
/PSL_CRLF true def
1 PSL_mode eq {
% Determine how much to expand text and also justify left/center/right
start PSL_expand
start PSL_placeword
/start start 1 add def
start 1 last {PSL_placeword} for
}
{ /PSL_ymin 0 def
PSL_word start get PSL_wordheight
/start start 1 add def
start 1 last {PSL_word exch get PSL_wordheight} for
line 0 eq { % First outputline
/PSL_top PSL_ymax def
} if
} ifelse
} if
/PSL_bottom PSL_ymin def
/PSL_parheight PSL_ybase neg PSL_top add PSL_bottom sub def
} def % PSL_textjustifier
|
