mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Sapphire/s/saveWarn

   1 ;
   2 ; saveWarn.s
   3 ;
   4 ; Warn the user about saving a document
   5 ;
   6 ; © 1994-1998 Straylight
   7 ;
   8
   9 ;----- Licensing note -------------------------------------------------------
  10 ;
  11 ; This file is part of Straylight's Sapphire library.
  12 ;
  13 ; Sapphire is free software; you can redistribute it and/or modify
  14 ; it under the terms of the GNU General Public License as published by
  15 ; the Free Software Foundation; either version 2, or (at your option)
  16 ; any later version.
  17 ;
  18 ; Sapphire is distributed in the hope that it will be useful,
  19 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ; GNU General Public License for more details.
  22 ;
  23 ; You should have received a copy of the GNU General Public License
  24 ; along with Sapphire.  If not, write to the Free Software Foundation,
  25 ; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26
  27 ;----- Standard Header ------------------------------------------------------
  28
  29                 GET     libs:header
  30                 GET     libs:swis
  31
  32                 GET     libs:stream
  33
  34 ;----- External dependencies ------------------------------------------------
  35
  36                 GET     sapphire:buttons
  37                 GET     sapphire:errorBox
  38                 GET     sapphire:msgs
  39                 GET     sapphire:sapphire
  40                 GET     sapphire:string
  41                 GET     sapphire:warning
  42
  43                 GET     sapphire:xfer.saveAs
  44
  45 ;----- Main code ------------------------------------------------------------
  46
  47                 AREA    |Sapphire$$Code|,CODE,READONLY
  48
  49 ; --- saveWarn ---
  50 ;
  51 ; On entry:     R0 == estimated size of data
  52 ;               R1 == file type of the data
  53 ;               R2 == pointer to name of the file
  54 ;               R3 == pointer to handler block
  55 ;               R4 == value to pass to handlers in R10
  56 ;               R5 == value to pass to handlers in R12
  57 ;               R6 == flags (in bottom two bits)
  58 ;
  59 ; On exit:      --
  60 ;
  61 ; Use:          Displays a warning box allowing the user to save a modified
  62 ;               document.  The flags in R6 are as follows:
  63 ;
  64 ;               Bit 0   File is safe; don't give a warning
  65 ;               Bit 1   File's name is sensible; display it in the warning
  66 ;
  67 ;               The handler block is the same as that passed to saveAs (q.v.)
  68 ;               with an extra entry point on the very beginning, which is
  69 ;               expected to remove the document from memory.  This entry
  70 ;               point is not passed any arguments except for R10 and R12.
  71 ;
  72 ;               In order for the system to work, you must call various
  73 ;               saveWarn routines from your saveAs entry points:
  74 ;
  75 ;               saveWarn_saved from saEntry__success
  76 ;               saveWarn_close from saEntry__closed
  77
  78                 EXPORT  saveWarn
  79 saveWarn        ROUT
  80
  81                 STMFD   R13!,{R0-R5,R12,R14}    ;Save some registers
  82                 WSPACE  sw__wSpace              ;Find my workspace address
  83
  84                 ; --- Save some data in workspace ---
  85
  86                 MOV     R0,#0                   ;Clear flags word now
  87                 STMIA   R12,{R0,R3-R5}          ;Save values in workspace
  88
  89                 ; --- Work out whether we need to warn the user ---
  90
  91                 TST     R6,#1                   ;Is the file safe?
  92                 BNE     %80saveWarn             ;Yes -- just trash it then
  93
  94                 ; --- Give the user a warning ---
  95
  96                 TST     R6,#2                   ;Is the file sensibly named?
  97                 ADREQ   R0,sw__noName           ;No -- point to general msg
  98                 ADRNE   R0,sw__named            ;Yes -- point to name msg
  99                 BL      msgs_lookup             ;Translate the message
 100                 BLNE    str_buffer              ;Get a nice string buffer
 101                 BLNE    str_subst               ;And substitute the name
 102
 103                 ADR     R1,sw__warnBlk          ;Point to button definition
 104                 BL      warning                 ;Ask the big question
 105                 BCC     %50saveWarn             ;If not `Save...' skip on
 106
 107                 ; --- User wants to try to save the file ---
 108
 109                 LDMIA   R13,{R0-R5}             ;Load saveAs arguments
 110                 ADD     R3,R3,#4                ;Point past our entry point
 111                 MOV     R14,#swFlag__saving     ;Just about to open save box
 112                 STR     R14,sw__flags           ;Save this flags word
 113                 BL      saveAs                  ;Try to save the file
 114                 BVC     %90saveWarn             ;If it's OK, return
 115
 116                 MOV     R14,#0                  ;Clear the saving flag
 117                 STR     R14,sw__flags           ;Save the flags again
 118                 MOV     R1,#1                   ;Display error with 1 button
 119                 BL      errorBox                ;Tell user we failed
 120                 B       %90saveWarn             ;And now return to caller
 121
 122                 ; --- User chose `Cancel' or `Discard' ---
 123
 124 50saveWarn      CMP     R0,#1                   ;Did we choose `Discard'?
 125                 BNE     %90saveWarn             ;No -- then do nothing at all
 126
 127 80saveWarn      BL      sw__discard             ;Discard the document
 128
 129 90saveWarn      LDMFD   R13!,{R0-R5,R12,PC}^    ;And return to caller
 130
 131 sw__noName      DCB     "swSDC0",0
 132 sw__named       DCB     "swSDC1",0
 133
 134 sw__warnBlk     BUTTON  "swSAVE"
 135                 BUTTON  "swDISC"
 136                 BCANCEL
 137                 BUTEND
 138
 139                 LTORG
 140
 141 ; --- sw__discard ---
 142 ;
 143 ; On entry:     --
 144 ;
 145 ; On exit:      --
 146 ;
 147 ; Use:          Discards the document.
 148
 149 sw__discard     ROUT
 150
 151                 STMFD   R13!,{R0,R10,R12,R14}   ;Save some registers
 152                 LDMIB   R12,{R0,R10,R12}        ;Load user call arguments
 153                 MOV     R14,PC                  ;Set up return address
 154                 MOV     PC,R0                   ;Call discard routine
 155                 LDMFD   R13!,{R0,R10,R12,PC}^   ;And return to caller
 156
 157                 LTORG
 158
 159 ; --- saveWarn_saved ---
 160 ;
 161 ; On entry:     --
 162 ;
 163 ; On exit:      --
 164 ;
 165 ; Use:          Informs saveWarn that the document has been saved.  If
 166 ;               saveWarn is not operating, this call is ignored.  You should
 167 ;               only call this routine if the document is *safe*, rather than
 168 ;               RAM transferred to another application, for example.
 169
 170                 EXPORT  saveWarn_saved
 171 saveWarn_saved  ROUT
 172
 173                 STMFD   R13!,{R12,R14}          ;Save some registers
 174                 WSPACE  sw__wSpace              ;Find my workspace
 175                 LDR     R14,sw__flags           ;Load the flags word
 176                 ORR     R14,R14,#swFlag__saved  ;Say that it's been saved
 177                 STR     R14,sw__flags           ;Save the flags back
 178                 LDMFD   R13!,{R12,PC}^          ;And return to caller
 179
 180                 LTORG
 181
 182 ; --- saveWarn_close ---
 183 ;
 184 ; On entry:     --
 185 ;
 186 ; On exit:      --
 187 ;
 188 ; Use:          Informs saveWarn that the save dialogue box has been closed.
 189 ;               If the document is now saved, then it is removed from
 190 ;               memory.
 191
 192                 EXPORT  saveWarn_close
 193 saveWarn_close  ROUT
 194
 195                 STMFD   R13!,{R12,R14}          ;Save some registers
 196                 WSPACE  sw__wSpace              ;Find my workspace
 197                 LDR     R14,sw__flags           ;Load the flags word
 198                 CMP     R14,#3                  ;Are both bits set?
 199                 BLEQ    sw__discard             ;Yes -- discard the document
 200                 MOVEQ   R14,#0                  ;Clear the flags
 201                 STREQ   R14,sw__flags           ;And save them back
 202                 LDMFD   R13!,{R12,PC}^          ;And return to caller
 203
 204                 LTORG
 205
 206 sw__wSpace      DCD     0
 207
 208 ;----- Workspace ------------------------------------------------------------
 209
 210                 ^       0,R12
 211 sw__wStart      #       0
 212
 213 sw__flags       #       4                       ;Various useful flags
 214 sw__table       #       4                       ;Address of client's table
 215 sw__R10         #       4                       ;Value to pass in R10
 216 sw__R12         #       4                       ;Value to pass in R12
 217
 218 sw__wSize       EQU     {VAR}-sw__wStart
 219
 220 swFlag__saving  EQU     (1<<0)                  ;We have a save box open
 221 swFlag__saved   EQU     (1<<1)                  ;User has saved the document
 222
 223                 AREA    |Sapphire$$LibData|,CODE,READONLY
 224
 225                 DCD     sw__wSize
 226                 DCD     sw__wSpace
 227                 DCD     0
 228                 DCD     0
 229
 230 ;----- That's all, folks ----------------------------------------------------
 231
 232                 END