diff options
Diffstat (limited to 'metapost/context/base/mpiv/mp-asnc.mpiv')
| -rw-r--r-- | metapost/context/base/mpiv/mp-asnc.mpiv | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/metapost/context/base/mpiv/mp-asnc.mpiv b/metapost/context/base/mpiv/mp-asnc.mpiv new file mode 100644 index 000000000..2626e4d58 --- /dev/null +++ b/metapost/context/base/mpiv/mp-asnc.mpiv @@ -0,0 +1,177 @@ +%D \module +%D [ file=mp-asnc.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_asnc : endinput ; fi ; + +boolean context_av ; context_asnc := true ; + +% will be replaced + +numeric sync_n[], sync_p[][], sync_w[][], sync_h[][], sync_d[][], sync_t[][] ; +pair sync_xy[][] ; color sync_c[][] ; + +def ResetSyncTasks = + path SyncPaths[] ; numeric SyncTasks[], NOfSyncPaths, CurrentSyncClass ; + NOfSyncPaths := CurrentSyncClass := 0 ; + if unknown SyncLeftOffset : numeric SyncLeftOffset ; SyncLeftOffset := 0 ; fi ; + if unknown SyncWidth : numeric SyncWidth ; SyncWidth := 0 ; fi ; + if unknown SyncThreshold : numeric SyncThreshold ; SyncThreshold := LineHeight ; fi ; + if unknown SyncColor : color SyncColor ; SyncColor := .5white ; fi ; + if (SyncLeftOffset = 0) and (SyncWidth = 0) : + SyncWidth := if known TextWidth : TextWidth else : -1cm fi ; + fi ; +enddef ; + +ResetSyncTasks ; + +vardef SyncBox(expr n, i, leftoffset, width, topoffset, bottomoffset) = + save o ; pair o ; o := (xpart llcorner PlainTextArea,ypart sync_xy[n][i]) ; + o shifted (leftoffset,sync_h[n][i]+topoffset) -- + o shifted (width+leftoffset,sync_h[n][i]+topoffset) -- + o shifted (width+leftoffset,bottomoffset) -- + o shifted (leftoffset,bottomoffset) -- cycle +enddef ; + +def SetSyncColor(expr n, i, c) = + sync_c[n][i] := c ; +enddef ; + +def SetSyncThreshold(expr n, i, th) = + sync_th[n][i] := th ; +enddef ; + +vardef TheSyncColor(expr n, i) = + if known sync_c[n][i] : sync_c[n][i] else : SyncColor fi +enddef ; + +vardef TheSyncThreshold(expr n, i) = + if known sync_th[n][i] : sync_th[n][i] else : SyncThreshold fi +enddef ; + +vardef PrepareSyncTasks(expr n, collapse, extendtop, prestartnext) = + ResetSyncTasks ; + if known sync_n[n] : + CurrentSyncClass := n ; + save ok, l, d ; boolean ok ; ok := false ; NOfSyncPaths := l := 0 ; + for i=1 upto sync_n[n] : + if RealPageNumber > sync_p[n][i] : + l := i ; + elseif RealPageNumber = sync_p[n][i] : + NOfSyncPaths := NOfSyncPaths + 1 ; + if not ok : + if i>1 : + if sync_t[n][i-1] = sync_t[n][i] : + SyncPaths[NOfSyncPaths] := SyncBox(n, i, SyncLeftOffset, SyncWidth, PaperHeight, -PaperHeight) ; + SyncTasks[NOfSyncPaths] := i ; + else : + SyncPaths[NOfSyncPaths] := SyncBox(n, i-1, SyncLeftOffset, SyncWidth, PaperHeight, -PaperHeight) ; + SyncTasks[NOfSyncPaths] := i-1 ; + NOfSyncPaths := NOfSyncPaths + 1 ; + SyncPaths[NOfSyncPaths] := SyncBox(n, i, SyncLeftOffset, SyncWidth, 0, -PaperHeight) ; + SyncTasks[NOfSyncPaths] := i ; + fi ; + else : + SyncPaths[NOfSyncPaths] := SyncBox(n, i, SyncLeftOffset, SyncWidth, 0, -PaperHeight) ; + SyncTasks[NOfSyncPaths] := i ; + fi ; + else : + SyncPaths[NOfSyncPaths] := SyncBox(n, i, SyncLeftOffset, SyncWidth, 0, -PaperHeight) ; + SyncTasks[NOfSyncPaths] := i ; + fi ; + ok := true ; + fi ; + endfor ; + if (NOfSyncPaths = 0) and (l > 0) : + NOfSyncPaths := 1 ; + SyncPaths[NOfSyncPaths] := SyncBox(n, l, SyncLeftOffset, SyncWidth, PaperHeight, -PaperHeight) ; + SyncTasks[NOfSyncPaths] := l ; + fi ; + if NOfSyncPaths > 0 : + for i = 1 upto NOfSyncPaths-1 : + SyncPaths[i] := topboundary SyncPaths[i] -- reverse topboundary SyncPaths[i+1] -- cycle ; + endfor ; + if unknown SyncThresholdMethod : + numeric SyncThresholdMethod ; SyncThresholdMethod := 2 ; + fi ; + if extendtop : + if SyncThresholdMethod = 1 : + if NOfSyncPaths>1 : + d := ypart (ulcorner PlainTextArea - sync_xy[n][SyncTasks[2]]) ; + if (SyncTasks[2]>1) and (d > 0pt) and (d <= TheSyncThreshold(n,sync_t[n][SyncTasks[2]])) and (sync_p[n][SyncTasks[2]] = RealPageNumber) : + SyncPaths[2] := SyncPaths[2] topenlarged PaperHeight ; + fi ; + fi ; + else : + for i = 1 upto NOfSyncPaths : + d := ypart (ulcorner PlainTextArea - sync_xy[n][SyncTasks[i]]) ; + if (d > 0) and (d <= TheSyncThreshold(n,sync_t[n][SyncTasks[i]])) and (sync_p[n][SyncTasks[i]] = RealPageNumber) : + SyncPaths[i] := SyncPaths[i] topenlarged PaperHeight ; + fi ; + endfor ; + fi ; + fi ; + if prestartnext : + if NOfSyncPaths>1 : + if SyncTasks[NOfSyncPaths] < sync_n[n] : % there is a next one + d := ypart (ulcorner PlainTextArea - sync_xy[n][SyncTasks[NOfSyncPaths]+1]) ; + if (d > 0) and (d <= TheSyncThreshold(n, sync_t[n][SyncTasks[i]])) and (sync_p[n][SyncTasks[NOfSyncPaths]+1] = RealPageNumber+1) : + SyncPaths[NOfSyncPaths+1] := + (xpart ulcorner SyncPaths[NOfSyncPaths],ypart llcorner PlainTextArea) -- + (xpart urcorner SyncPaths[NOfSyncPaths],ypart llcorner PlainTextArea) -- + lrcorner SyncPaths[NOfSyncPaths] -- + llcorner SyncPaths[NOfSyncPaths] -- cycle ; + SyncTasks[NOfSyncPaths+1] := SyncTasks[NOfSyncPaths]+1 ; + NOfSyncPaths := NOfSyncPaths + 1 ; + fi ; + fi ; + fi ; + else : + if NOfSyncPaths>1 : + d := ypart (sync_xy[n][SyncTasks[NOfSyncPaths]] - llcorner PlainTextArea) ; + if (d < TheSyncThreshold(n, SyncTasks[NOfSyncPaths])) : + NOfSyncPaths := NOfSyncPaths - 1 ; + SyncPaths[NOfSyncPaths] := SyncPaths[NOfSyncPaths] bottomenlarged PaperHeight ; + fi ; + fi ; + fi ; + if (NOfSyncPaths>1) and collapse : + save j ; numeric j ; j := 1 ; + for i = 2 upto NOfSyncPaths : + if sync_t[n][SyncTasks[i]] = sync_t[n][SyncTasks[j]] : + SyncPaths[j] := boundingbox image (draw SyncPaths[i] ; draw SyncPaths[j] ; ) ; + SyncTasks[j] := SyncTasks[i] ; + else : + j := j + 1 ; + SyncPaths[j] := SyncPaths[i] ; + SyncTasks[j] := SyncTasks[i] ; + fi ; + endfor ; + NOfSyncPaths := j ; + fi ; + fi ; + fi ; +enddef ; + +def SyncTask(expr n) = + if known SyncTasks[n] : SyncTasks[n] else : 0 fi +enddef ; + +def FlushSyncTasks = + for i = 1 upto NOfSyncPaths : + ProcessSyncTask(SyncPaths[i], TheSyncColor(CurrentSyncClass,sync_t[CurrentSyncClass][SyncTasks[i]])) ; + endfor ; +enddef ; + +def ProcessSyncTask(expr p, c) = + fill p withcolor c ; +enddef ; |