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Diffstat (limited to 'Master/texmf-dist/metapost/context/base/mpiv/mp-abck.mpiv')
| -rw-r--r-- | Master/texmf-dist/metapost/context/base/mpiv/mp-abck.mpiv | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/Master/texmf-dist/metapost/context/base/mpiv/mp-abck.mpiv b/Master/texmf-dist/metapost/context/base/mpiv/mp-abck.mpiv new file mode 100644 index 00000000000..abd7d8848ec --- /dev/null +++ b/Master/texmf-dist/metapost/context/base/mpiv/mp-abck.mpiv @@ -0,0 +1,269 @@ +%D \module +%D [ file=mp-abck.mpiv, +%D version=2012.02.19, % was mp-core: 1999.08.01, anchoring +%D title=\CONTEXT\ \METAPOST\ graphics, +%D subtitle=anchored background macros, +%D author=Hans Hagen, +%D date=\currentdate, +%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}] +%C +%C This module is part of the \CONTEXT\ macro||package and is +%C therefore copyrighted by \PRAGMA. See mreadme.pdf for +%C details. + +if known context_abck : endinput ; fi ; + +boolean context_abck ; context_abck := true ; + +path multiregs[], % region used for multipar (tracing only) + multipars[], % effective area (shape) + multibox ; % main boundingbox (of main region) + +string multikind[] ; % region state: single | first | middle | last (new method) + +numeric multilocs[], % 1=begin 2=between 3=end (old method) + nofmultipars ; % number of calculated areas + +numeric par_strut_height, + par_strut_depth, + par_line_height ; + +nofmultipars := 0 ; +par_strut_height := 0 ; +par_strut_depth := 0 ; +par_line_height := 0 ; + +def boxgridoptions = withcolor .8red enddef ; +def boxlineoptions = withcolor .8blue enddef ; +def boxfilloptions = withcolor .8white enddef ; + +numeric boxgridtype ; boxgridtype := 0 ; +numeric boxlinetype ; boxlinetype := 1 ; +numeric boxfilltype ; boxfilltype := 1 ; +numeric boxdashtype ; boxdashtype := 0 ; +pair boxgriddirection ; boxgriddirection := up ; +numeric boxgridwidth ; boxgridwidth := 1pt ; +numeric boxlinewidth ; boxlinewidth := 1pt ; +numeric boxlineradius ; boxlineradius := 0 ; +numeric boxlineoffset ; boxlineoffset := 0 ; +numeric boxfilloffset ; boxfilloffset := 0 ; +numeric boxgriddistance ; boxgriddistance := .5cm ; +numeric boxgridshift ; boxgridshift := 0 ; + +def abck_show_path(expr p, r, c) = + draw p withpen pencircle scaled .5pt withcolor c ; + if length(p) > 2 : + begingroup ; save _c_ ; path _c_ ; _c_ := fullcircle scaled r ; + for i=0 upto length(p) if cycle p : -1 fi : + fill _c_ shifted point i of p withcolor white ; + draw _c_ shifted point i of p withpen pencircle scaled .5pt withcolor c ; + endfor ; + fi ; +enddef ; + +vardef abck_draw_path(expr p) = + if (length p > 2) and (bbwidth(p) > 1) and (bbheight(p) > 1) : + save pp ; path pp ; + pp := p if (boxlineradius>0) and (boxlinetype=2) : cornered boxlineradius fi ; + if boxfilltype > 0 : + if boxfilloffset > 0 : + interim linejoin := mitered ; + filldraw pp boxfilloptions withpen pencircle scaled (2*boxfilloffset) ; + else : + fill pp boxfilloptions ; + fi ; + fi ; + if boxlinetype > 0 : + draw pp boxlineoptions withpen pencircle scaled boxlinewidth ; + fi ; + fi ; +enddef ; + +def abck_grid_line(expr start, width) = + % 1 = normal, 2 = with background (i.e. no shine-through) + if boxdashtype = 2 : + draw start -- start shifted (width,0) + withpen pencircle scaled boxgridwidth + boxfilloptions ; + fi ; + draw start -- start shifted (width,0) + if boxdashtype > 0 : + dashed evenly + fi + withpen pencircle scaled boxgridwidth + boxgridoptions ; +enddef ; + +vardef abck_baseline_grid(expr pxy, pdir, at_baseline) = + save width ; width := bbwidth(pxy) ; + save height ; height := bbheight(pxy) ; + if (par_line_height > 0) and (height > 1) and (width > 1) and (boxgridwidth > 0) : + save i, grid, bb ; picture grid ; pair start ; path bb ; + grid := image ( % fails with inlinespace + if pdir = up : + for i = if at_baseline : par_strut_depth else : 0 fi step par_line_height until max(height,par_line_height) : + abck_grid_line(llcorner pxy shifted (0,+i),width) ; + endfor ; + else : + for i = if at_baseline : par_strut_height else : 0 fi step par_line_height until height : + abck_grid_line(ulcorner pxy shifted (0,-i),width) ; + endfor ; + fi ; + ) ; + clip grid to pxy ; + bb := boundingbox grid ; + grid := grid shifted (0,boxgridshift) ; + setbounds grid to bb ; + grid + else : + nullpicture + fi +enddef ; + +vardef abck_graphic_grid(expr pxy, dx, dy, x, y) = + if (bbheight(pxy) > dy) and (bbwidth(pxy) > dx) and (boxgridwidth > 0) : + save grid ; picture grid ; + grid := image ( + for i = xpart llcorner pxy step dx until xpart lrcorner pxy : + draw (i,ypart llcorner pxy) -- (i,ypart ulcorner pxy) withpen pencircle scaled boxgridwidth ; + endfor ; + for i = ypart llcorner pxy step dy until ypart ulcorner pxy : + draw (xpart llcorner pxy,i) -- (xpart lrcorner pxy,i) withpen pencircle scaled boxgridwidth ; + endfor + ) shifted (x,y) ; + clip grid to pxy ; + grid + else : + nullpicture + fi +enddef ; + +def draw_multi_pars = + for i=1 upto nofmultipars : + abck_draw_path(multipars[i]) ; + if boxgridtype = 1 : + draw abck_baseline_grid(multipars[i],if multilocs[i]=1: down else: up fi,true) ; + elseif boxgridtype = 2 : + draw abck_baseline_grid(multipars[i],if multilocs[i]=1: down else: up fi,false) ; + elseif boxgridtype = 3 : + draw abck_baseline_grid(multipars[i],if multilocs[i]=1: down else: up fi,true) ; + draw abck_baseline_grid(multipars[i],if multilocs[i]=1: down else: up fi,true) shifted (0,ExHeight) ; + elseif boxgridtype = 4 : + draw abck_baseline_grid(multipars[i],if multilocs[i]=1: down else: up fi,true) shifted (0,ExHeight/2) ; + elseif boxgridtype = 11 : + draw abck_graphic_grid(multipars[i],boxgriddistance,boxgriddistance,boxgriddistance/2,boxgriddistance/2) ; + elseif boxgridtype = 12 : + draw abck_graphic_grid(multipars[i],boxgriddistance,boxgriddistance,0,0) ; + fi ; + endfor ; +enddef ; + +def show_multi_pars = + for i=1 upto nofmultipars : + abck_show_path(multipars[i], 6pt, .5blue) ; + endfor ; +enddef ; + +def show_multi_kind = + for i=1 upto nofmultipars : + fill multipars[i] + withcolor + if multikind[i] = "single" : yellow + elseif multikind[i] = "first" : red + elseif multikind[i] = "middle" : green + elseif multikind[i] = "last" : blue + fi + withtransparency (1,.5) + ; + endfor ; +enddef ; + +def multi_side_draw_options = enddef ; + +def draw_multi_side = + begingroup ; save p ; picture p ; + for i=1 upto nofmultipars : + p := image ( fill leftboundary multipars[i] + shifted (-boxlineoffset,0) + rightenlarged boxlinewidth boxlineoptions ; + ) ; + setbounds p to multipars[i] ; + draw p ; + endfor ; + endgroup ; +enddef ; + +def draw_multi_side_path text t = + begingroup ; save p ; picture p ; + for i=1 upto nofmultipars : + p := image ( draw leftboundary multipars[i] + shifted (-boxlineoffset,0) + withpen pensquare scaled boxlinewidth boxlineoptions t ; + ) ; + setbounds p to multipars[i] ; + draw p ; + endfor ; + endgroup ; +enddef ; + +% some extras + +path posboxes[], + posregions[] ; + +numeric multipages[], + nofposboxes ; + +nofposboxes := 0 ; + +% For the moment we keep these as they can be in use but they will +% disappear. + +pair lxy[], rxy[], cxy[], llxy[], lrxy[], ulxy[], urxy[] ; +path pxy[] ; +numeric hxy[], wxy[], dxy[], nxy[] ; + +def box_found (expr n,x,y,w,h,d) = + not ((x=0) and (y=0) and (w=0) and (h=0) and (d=0)) +enddef ; + +def initialize_box_pos (expr pos,n,x,y,w,h,d) = + pair lxy, rxy, cxy, llxy, lrxy, ulxy, urxy ; + path pxy ; numeric hxy, wxy, dxy, nxy; + lxy := (x,y) ; + llxy := (x,y-d) ; + lrxy := (x+w,y-d) ; + urxy := (x+w,y+h) ; + ulxy := (x,y+h) ; + wxy := w ; + hxy := h ; + dxy := d ; + rxy := lxy shifted (wxy,0) ; + pxy := llxy--lrxy--urxy--ulxy--cycle ; + cxy := center pxy ; + nxy := n ; + freeze_box(pos) ; +enddef ; + +def freeze_box (expr pos) = + lxy[pos] := lxy ; + llxy[pos] := llxy ; + lrxy[pos] := lrxy ; + urxy[pos] := urxy ; + ulxy[pos] := ulxy ; + wxy[pos] := wxy ; + hxy[pos] := hxy ; + dxy[pos] := dxy ; + rxy[pos] := rxy ; + pxy[pos] := pxy ; + cxy[pos] := cxy ; + nxy[pos] := nxy ; +enddef ; + +def initialize_box (expr n,x,y,w,h,d) = + numeric bpos ; bpos := 0 ; initialize_box_pos(bpos,n,x,y,w,h,d) ; +enddef ; + +def anchor_box (expr n,x,y,w,h,d) = + currentpicture := currentpicture shifted (-x,-y) ; +enddef ; |