-- stack: in.01
-- format: 8 (HyperCard 1)
-- flags: 0x1000 (none)
-- protect password hash: 0
-- maximum user level: 5 (scripting)
-- window: Rect(x1=0, y1=0, x2=0, y2=0)
-- screen: Rect(x1=0, y1=0, x2=0, y2=0)
-- card dimensions: w=0 h=0
-- scroll: x=0 y=0
-- background count: 3
-- first background id: 2734
-- card count: 4
-- first card id: 2966
-- list block id: 4588
-- print block id: 2124
-- font table block id: 0
-- style table block id: 0
-- free block count: 0
-- free size: 0 bytes
-- total size: 50080 bytes
-- stack block size: 10240 bytes
-- created by hypercard version: 0x01208000
-- compacted by hypercard version: 0x01228000
-- modified by hypercard version: 0x01228000
-- opened by hypercard version: 0x01228000
-- patterns[0]: 0x0000000000000000
-- patterns[1]: 0x8000000008000000
-- patterns[2]: 0x8800220088002200
-- patterns[3]: 0x8888222288882222
-- patterns[4]: 0x88AA22AA88AA22AA
-- patterns[5]: 0xCCAA33AACCAA33AA
-- patterns[6]: 0xEEAABBAAEEAABBAA
-- patterns[7]: 0xEEBBBBEEEEBBBBEE
-- patterns[8]: 0xFFBBFFEEFFBBFFEE
-- patterns[9]: 0xFFBBFFFFFFBBFFFF
-- patterns[10]: 0x8010022001084004
-- patterns[11]: 0xFFFFFFFFFFFFFFFF
-- patterns[12]: 0x8822882288228822
-- patterns[13]: 0x1122448811224488
-- patterns[14]: 0xC4800C6843023026
-- patterns[15]: 0xB130031BD8C00C8D
-- patterns[16]: 0xAA00AA00AA00AA00
-- patterns[17]: 0x8822552288225522
-- patterns[18]: 0x8855225588552255
-- patterns[19]: 0x77DD77DD77DD77DD
-- patterns[20]: 0x8000000000000000
-- patterns[21]: 0xAA55AA55AA55AA55
-- patterns[22]: 0x038448300C020101
-- patterns[23]: 0x8244394482010101
-- patterns[24]: 0x8814224188412214
-- patterns[25]: 0x8080413E080814E3
-- patterns[26]: 0x22048C7422179810
-- patterns[27]: 0xBE808808EB088880
-- patterns[28]: 0x25C8328964244C92
-- patterns[29]: 0xA29C41BE2AC914EB
-- patterns[30]: 0x40A00000040A0000
-- patterns[31]: 0x8040200002040800
-- patterns[32]: 0xAA00800088008000
-- patterns[33]: 0xFF80808080808080
-- patterns[34]: 0x081C22C180010204
-- patterns[35]: 0xFF808080FF080808
-- patterns[36]: 0xF87422478F172271
-- patterns[37]: 0xBF00BFBFB0B0B0B0
-- patterns[38]: 0xFF7FBE5DA2418000
-- patterns[39]: 0xFAF5FAF5A050A050
-- checksum: 0x0
----- HyperTalk script -----
on openStack
  -- do some checking to be sure all is well...
  if the version < 1.2 then
    beep
    answer "Sorry, need newer version of HyperCard!"
  end if
  if the number of this card is 1 then
    if field "Text" is empty then
      put "Free Text Browser - Copyright © 1990 - Mark Zimmermann" & return & "Click on the '?' for help." & return & "This program is free and comes with NO WARRANTY whatsoever!" into field "Text"
    end if
  end if
  initGlobals    -- set up many things for this stack
  if item 4 of the screenrect <= 342 then hide menuBar
  pass openStack
end openStack

on closeStack
  -- close out files, vars, empty fields nicely
  set cursor to watch
  lock screen
  repeat for the number of cards -- close all database files
    if the short name of this bkgnd is "BrowserBg" then closeDatabase
    go to next card
  end repeat
  show menuBar
  pass closeStack
end closeStack

on closeDatabase
  -- called before opening a file as well as when leaving the stack
  get openCloseFiles (getTextFileRefNum(), getKeyFileRefNum(), getPtrFileRefNum())
  if not (getSubsetHandle(1) = 0 or getSubsetHandle(1) = empty) then
    get zbrowser ("RELEASESUBSET", getSubsetHandle(1))
    setSubsetHandle 1,0
  end if
  if not (getSubsetHandle(2) = 0 or getSubsetHandle(2) = empty) then
    get zbrowser ("RELEASESUBSET", getSubsetHandle(2))
    setSubsetHandle 2,0
  end if
  put empty into field "FTVars"
  put empty into field "Index1"
  put empty into field "Index2"
  put empty into field "Context"
  put empty into field "Text"
  put empty into field "Database Name"
  if the height of field "Text" > 169 then
    send mouseUp to bg button id 44
  end if
  hide field "searchPattern1"
  hide field "searchPattern2"
  hide bg button "and subsets"
  hide bg button "or subsets"
  hide bg button "not subset 1"
  hide bg button "not subset 2"
  hide bg button "fill subset 1"
  hide bg button "fill subset 2"
end closeDatabase

on initGlobals
  -- initialize many things here for the stack to use globally
  global indexLines, contextLines, maxIndexSampleCount, indexCountWidth, indexKeyWidth, contextLineLength, contextWordOffset, maxContextLinesSkipped, textChunkSize, textOffset, errorCount, contextGutterWidth, whichSubset
  put 7 into indexLines -- hold this many lines in Index fields
  put 7 into contextLines -- hold this many lines in Context field
  put 100 into maxIndexSampleCount -- sample size during subset counts
  put 5 into indexCountWidth -- this many digits of count info for Index
  put 28 into indexKeyWidth -- this many letters of Index words
  put 80 into contextLineLength -- this many letters of Context
  put 35 into contextWordOffset -- key word starts in this column
  put 100 into maxContextLinesSkipped
  -- make a line of dots after this many lines in subset are skipped
  put 8192 into textChunkSize -- grab this much for text field
  put 4096 into textOffset -- put key word this far into text chunk
  put 0 into errorCount -- initialize counter to control error display
  put 0 into contextGutterWidth -- spaces before key word
  put 1 into whichSubset -- identify which subset, 1 or 2, is being used
end initGlobals

on checkOpenDatabase
  -- test to catch attempt to operate without an open indexed file;
  -- try turning it into an "Open Database" request if so!
  if (getTextFileRefNum() = 0  or getTextFileRefNum() = empty) then
    beep
    answer "No database open!"
    exit to HyperCard
  end if
end checkOpenDatabase

function clickedLineNum
-- compute which line number of the field got the click
return 1 + trunc((item 2 of the clickLoc - (item 2 of (the rectangle of the target))) / (the textheight of the target))
end clickedLineNum

function clickedOnLeftHalf
-- see if click was on left half of the button, for AND and OR subsets
put item 1 of the clickLoc into clickX
put ((item 1 of the rect of the target) + (item 3 of the rect of the target)) / 2 into midPointX
return (clickX < midPointX)
end clickedOnLeftHalf

on browseIndex1
  -- fill Index field #1
  global indexLines, maxIndexSampleCount, indexCountWidth, indexKeyWidth
  get zbrowser ("INDEX", getwordnum1(), indexLines, maxIndexSampleCount, indexCountWidth, indexKeyWidth, getKeyFileRefNum(), getPtrFileRefNum(), getSubsetHandle(1))
  put line 1 to indexLines of It into field "Index1"
  setInstanceList1 (line (indexLines+1) to (2*indexLines) of It)
end browseIndex1

on browseIndex2
  -- fill Index field #2
  global indexLines, maxIndexSampleCount, indexCountWidth, indexKeyWidth
  get zbrowser ("INDEX", getwordnum2(), indexLines, maxIndexSampleCount, indexCountWidth, indexKeyWidth, getKeyFileRefNum(), getPtrFileRefNum(), getSubsetHandle(2))
  put line 1 to indexLines of It into field "Index2"
  setInstanceList2 (line (indexLines+1) to (2*indexLines) of It)
end browseIndex2

on browseContext lineOffset
  -- fill the Context field
  global contextLines, contextLineLength, contextWordOffset, maxContextLinesSkipped, contextGutterWidth, whichSubset
  get zbrowser ("CONTEXT", getInstanceNum(), contextLines, lineOffset, contextLineLength, contextWordOffset, maxContextLinesSkipped, contextGutterWidth, getPtrFileRefNum(), getTextFileRefNum(), getSubsetHandle(whichSubset))
  put line 1 to contextLines of It into field Context
  setTextPtrList (line (contextLines+1) to (2*contextLines) of It)
end browseContext

--
-- the remaining functions set and fetch values of various useful
-- quantities; do it this way to hide the details of how things are
-- stored....
--

function getTextFileRefNum
return line 1 of field FTVars
end getTextFileRefNum

on setTextFileRefNum refNum
  put refNum into line 1 of field FTVars
end setTextFileRefNum

function getKeyFileRefNum
return line 2 of field FTVars
end getKeyFileRefNum

on setKeyFileRefNum refNum
  put refNum into line 2 of field FTVars
end setKeyFileRefNum

function getPtrFileRefNum
return line 3 of field FTVars
end getPtrFileRefNum

on setPtrFileRefNum refNum
  put refNum into line 3 of field FTVars
end setPtrFileRefNum

function getWordNum1
return line 4 of field FTVars
end getWordNum1

on setWordNum1 wordNum
  put wordNum into line 4 of field FTVars
end setWordNum1

function getWordNum2
return line 5 of field FTVars
end getWordNum2

on setWordNum2 wordNum
  put wordNum into line 5 of field FTVars
end setWordNum2

function getInstanceNum
return line 6 of field FTVars
end getInstanceNum

on setInstanceNum instanceNum
  put instanceNum into line 6 of field FTVars
end setInstanceNum

function getTextStart
return line 7 of field FTVars
end getTextStart

on setTextStart textStart
  put textStart into line 7 of field FTVars
end setTextStart

function getTextTarget
return line 8 of field FTVars
end getTextTarget

on setTextTarget textTarget
  put textTarget into line 8 of field FTVars
end setTextTarget

function getTextEnd
return line 9 of field FTVars
end getTextEnd

on setTextEnd textEnd
  put textEnd into line 9 of field FTVars
end setTextEnd

function getSubsetHandle subsetNumber
return line 9+subsetNumber of field FTVars
end getSubsetHandle

on setSubsetHandle subsetNumber, handle
  put handle into line 9+subsetNumber of field FTVars
end setSubsetHandle

function getNeighborhoodSize
return line 12 of field FTVars
end getNeighborhoodSize

on setNeighborhoodSize size
  put size into line 12 of field FTVars
end setNeighborhoodSize

-- lines 13 through 19 of field FTVars are currently unused

function getInstanceList1item instanceNum
return line 19+instanceNum of field FTVars
end getInstanceList1item

on setInstanceList1 instanceList
  global indexLines
  put instanceList into line 20 to 19+indexLines of field FTVars
end setInstanceList1

function getInstanceList2item instanceNum
global indexLines
return line 19+indexLines+instanceNum of field FTVars
end getInstanceList2item

on setInstanceList2 instanceList
  global indexLines
  put instanceList into line 20+indexLInes to 19+2*indexLines of field FTVars
end setInstanceList2

function getTextPtrListInstanceItem itemNum
global indexLines, contextLines
return word 1 of line 19+2*indexLines+itemNum of field FTVars
end getTextPtrListInstanceItem

function getTextPtrListPtrItem itemNum
global indexLines, contextLines
return word 2 of line 19+2*indexLines+itemNum of field FTVars
end getTextPtrListPtrItem

on setTextPtrList textPtrList
  global indexLines, contextLines
  put textPtrList into line 20+2*indexLInes to 19+2*indexLines +contextLines of field FTVars
end setTextPtrList