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- #define MANX
-
- /*
- * browser - Rummage around on disks.
- *
- * copyright (c) 1986, Mike Meyer
- *
- * Permission is hereby granted to distribute this program, so long as this
- * source file is distributed with it, and this copyright notice is not
- * removed from the file.
- *
- * Locks, general - do I need a stack of locks, one per directory level?
- * do I have to free the lock in done?
- */
-
- #ifdef MANX
- #include <functions.h>
- #endif
- #include <exec/types.h>
- #include <graphics/gfxbase.h>
- #include <libraries/dos.h>
- #include <libraries/dosextens.h>
- #include <intuition/intuition.h>
- #include <stdio.h>
- #define INTUITION_REV 1L
- #define GRAPHICS_REV 1L
-
- #define LONGEST_NAME 80 /* Longest file name we can deal with */
- #define LONGEST_LINE 256 /* Longest line we will deal with */
- #define AVG_LINE_LENGTH 66 /* A guess, tune it if you need to */
-
- #define UP_GADGET ((unsigned short) 0)
- #define DOWN_GADGET ((unsigned short) 1)
- #define SCROLL_GADGET ((unsigned short) 2)
- #define GWIDTH 16 /* Width of my two gadgets */
- #define GHEIGHT 9 /* and their heights */
-
- #define FIRST 18L
- /*
- * Pictures for the up and down arrows
- */
- static USHORT arrows[2][GHEIGHT] = {
- {0xFE7F, 0xFC3F, 0xF81F, 0xF00F, /* Up */
- 0xFC3F, 0xFC3F, 0xFC3F, 0xFC3F, 0xFC3F},
- {0xFC3F, 0xFC3F, 0xFC3F, 0xFC3F, /* Down */
- 0xFC3F, 0xF00F, 0xF81F, 0xFC3F, 0xFE7F}
- } ;
- /*
- * Now, the Image structures that use the arrows
- */
- static struct Image Arrow_Image[2] = {
- {0, 0, GWIDTH, GHEIGHT, 1, arrows[UP_GADGET], 1, 0, /* Up */
- /*(struct Image *)*/ NULL},
- {0, 0, GWIDTH, GHEIGHT, 1, arrows[DOWN_GADGET], 1, 0, /* Down */
- /*(struct Image *)*/ NULL}
- };
- /*
- * Now, my Gadget structures
- */
- static struct PropInfo prop;
- static struct Image prop_img;
-
- static struct Gadget Scroll_Gadget = {
- /*(struct Gadget *)*/ NULL, /* End of Gadgets */
- 0,11+GHEIGHT, /* Left, Top */
- GWIDTH, -((GHEIGHT*2)+11),
- GRELHEIGHT | GADGHCOMP | GADGDISABLED,
- RELVERIFY, /* Messages when released */
- PROPGADGET,
- (APTR) &prop_img,
- (APTR) NULL, /* No rendering image, using HCOMP */
- /*(struct IntuiText *)*/ NULL,
- 0L, /* No mutex */
- (APTR) &prop,
- SCROLL_GADGET, /* Yes, this is the scroll gadget */
- (APTR) NULL /* And nothing of mine */
- };
-
- static struct Gadget Up_Gadget = {
- &Scroll_Gadget, /* next gadget is scroll */
- 0,11, /* Left, Top */
- GWIDTH, GHEIGHT,
- GADGIMAGE | GADGDISABLED | GADGHCOMP,
- RELVERIFY, /* Messages when released */
- BOOLGADGET, /* These be boolean gadgets */
- (APTR) &(Arrow_Image[UP_GADGET]),
- (APTR) NULL, /* No rendering image, using HCOMP */
- /*(struct IntuiText *)*/ NULL,
- 0L, /* No mutex */
- (APTR) NULL, /* Nothing special */
- UP_GADGET, /* Yes, this is the up gadget */
- (APTR) NULL /* And nothing of mine */
- };
-
- static struct Gadget Down_Gadget = {
- &Up_Gadget, /* Next gadget is Up_Gadget */
- 0, 1 - GHEIGHT, /* Left, Top */
- GWIDTH, GHEIGHT,
- GRELBOTTOM | GADGIMAGE | /* Standard bottom border gadget */
- GADGDISABLED | GADGHCOMP,
- RELVERIFY | BOTTOMBORDER, /* Messages when released */
- BOOLGADGET, /* These be boolean gadgets */
- (APTR) &(Arrow_Image[DOWN_GADGET]),
- (APTR) NULL, /* No rendering image, using HCOMP */
- /*(struct IntuiText *)*/ NULL,
- 0L, /* No mutex */
- (APTR) NULL, /* Nothing special */
- DOWN_GADGET, /* Yes, this is the up gadget */
- (APTR) NULL /* And nothing of mine */
- };
-
- /*
- * Now, the window for it all
- */
- static struct NewWindow New_Window = {
- #ifdef DEBUG
- 0, 0, 540, 150, /* smaller window to left printf's show up */
- #else
- 0, 0, 640, 200, /* Full screen */
- #endif
- -1L, -1L, /* Default pens */
- MENUPICK | CLOSEWINDOW /* I want to know about menupicks */
- | GADGETUP, /* Window closes and gadgets */
- ACTIVATE /* Standard window */
- | SMART_REFRESH | NOCAREREFRESH | SIZEBBOTTOM
- | WINDOWSIZING | WINDOWDEPTH | WINDOWCLOSE | WINDOWDRAG,
- &Down_Gadget, /* Add my gadgets */
- /*(struct Image *)*/ NULL,
- " Browser 0.1 with Bob Leivian's additions", /* Title */
- /*(struct Screen *)*/NULL,
- /*(struct BitMap *)*/NULL,
- 100, 40, /* Minimum sizes */
- 640, 200, /* Maximum sizes */
- WBENCHSCREEN /* and put it on the workbench */
- } ;
-
- /*
- * My very own variables (mostly for done)
- */
- static struct Window *My_Window = NULL ;
- static FILE *infile = NULL ; /* Current input file */
- #ifdef MANX
- static void Page_File();
- #else
- static void Page_File(unsigned short) ;
- #endif
-
- /*
- * And someone else's variables
- */
- struct IntuitionBase *IntuitionBase ;
- struct GfxBase *GfxBase ;
- extern struct Menu *AutoMenu ;
-
- /*
- * Finally, declare the string twiddling functions as voids
- */
- #ifdef MANX
- void strcat(), strcpy(), strncat();
- #else
- void strcat(char *, char *), strcpy(char *, char *) ,
- strncat(char *, char *, int) ;
- #endif
-
- main() {
- register struct IntuiMessage *message;
- register unsigned short class, code ;
-
- /* Set up the world this lives in */
- if ((IntuitionBase = (struct IntuitionBase *)
- OpenLibrary("intuition.library", INTUITION_REV)) == NULL)
- done(20, "can't open intuition library") ;
-
- if ((GfxBase = (struct GfxBase *)
- OpenLibrary("graphics.library", GRAPHICS_REV)) == NULL)
- done(20, "can't open graphics library") ;
-
- /* set up the scroll bar */
- prop.Flags = FREEVERT | AUTOKNOB;
- prop.VertBody = 0x1000;
-
- if ((My_Window = (struct Window *) OpenWindow(&New_Window)) == NULL)
- done(20, "can't open the window") ;
-
- SetAPen(My_Window -> RPort, 1L) ; /* Should be default! */
-
- show_message("Pick Disk with Menu Button ");
-
- /* Set up the first menu level */
- Menu_Init() ;
- Menu_Add("disks ", 1L) ;
- Menu_Item_Add("df0:", ITEMENABLED, 0L, 0) ;
- Menu_Item_Add("df1:", ITEMENABLED, 0L, 0) ;
- Menu_Item_Add("ram:", ITEMENABLED, 0L, 0) ;
- SetMenuStrip(My_Window, AutoMenu) ;
-
- /* Now spin on messages, handling them as they arrive */
- for (;;) {
- Wait(1L << (long) My_Window -> UserPort -> mp_SigBit) ;
- while ((message = GetMsg(My_Window -> UserPort)) != NULL) {
- class = message -> Class ;
- code = message -> Code ;
- ReplyMsg(message) ;
- #ifdef DEBUG
- printf("message:%d\n", class);
- #endif
- switch (class) {
- case CLOSEWINDOW:
- done(0, NULL) ;
-
- case MENUPICK:
- if (code != MENUNULL)
- Examine_Menu_Pick(code) ;
- break ;
-
- case GADGETUP:
- Page_File(((struct Gadget *) (message -> IAddress)) -> GadgetID) ;
- break ;
-
- default:
- printf("browser: intuition event 0x%x\n", class) ;
- done(20, "unexpected intution event") ;
- break ;
- }
- }
- }
- done(20, "broke out of never-breaking loop!") ;
- }
-
-
- /*
- * Examine_Menu_Pick - takes a menu pick, and twiddles the state variables
- * to match that pick.
- */
- static
- Examine_Menu_Pick(Menu_Number)
- unsigned short Menu_Number;
- {
- register unsigned short level, i, dirp ;
- register char *cp ;
- char *name, *index() ;
- #ifdef MANX
- struct MenuItem *ItemAddress(/* struct Menu *, long*/) ;
- #else
- struct MenuItem *ItemAddress(struct Menu *, unsigned short) ;
- #endif
- /* State variables that describe the current directory */
- static char Dir_Name[LONGEST_NAME] ;
- static unsigned short Menu_Level = 0 ;
-
- name = ((struct IntuiText *)
- (ItemAddress(AutoMenu, (long) Menu_Number) -> ItemFill)) -> IText ;
- level = MENUNUM(Menu_Number) ;
-
- /* Got what we want, so clear the menu to avoid confusing the user */
- ClearMenuStrip(My_Window);
- OffGadget((APTR)&Down_Gadget, My_Window, NULL);
- OffGadget((APTR)&Up_Gadget, My_Window, NULL);
- OffGadget((APTR)&Scroll_Gadget, My_Window, NULL);
-
- /* set dirp to FALSE if the name is not a directory or disk */
- dirp = (index(name, '/') != NULL || index(name, ':') != NULL) ;
-
- /* First, set the directory name right */
- if (level > Menu_Level) /* Not possible, die */
- done(20, "impossible menu value returned") ;
- else if (level == 0) /* picked a new disk */
- Dir_Name[0] = '\0' ;
- else if (level < Menu_Level) { /* Throw away some levels */
- for (i = 1, cp = index(Dir_Name, ':'); i < level; i++) {
- if (cp == NULL) done(20, "broken file name") ;
- cp = index(cp, '/') ;
- }
- if (cp == NULL) done(20, "broken file name") ;
- *++cp = '\0' ;
- }
- /* else Menu_Level == level, chose a file at current level */
-
- /* Now, fix up the menu and it's state variable */
- while (Menu_Level > level) {
- Menu_Level-- ;
- Menu_Pop() ;
- }
-
- /* If we added a directory, tack it onto the name */
- if (dirp) {
- Menu_Level++ ;
- strncat(Dir_Name, name, LONGEST_NAME - strlen(Dir_Name) - 1) ;
- }
-
- /* Now, tell the user all about it */
- if (dirp)
- Add_Dir(Dir_Name, name) ;
- else
- Display_File(Dir_Name, name) ;
- SetMenuStrip(My_Window, AutoMenu) ;
- }
-
- /*
- * Add_Dir - given a dir and a name, add the menu name with the files in
- * dir as entries.
- */
- static
- Add_Dir(dir, name) char *dir, *name; {
- struct FileInfoBlock File_Info ;
- register char *last_char ;
- #ifdef MANX
- register struct FileLock *my_lock;
- #else
- register struct FileLock *my_lock, *Lock(char *, int) ;
- #endif
- unsigned short count ;
- static char Name_Buf[LONGEST_NAME] ;
-
- /* Fix up the trailing / if it needs it */
- last_char = &dir[strlen(dir) - 1] ;
- if (*last_char == '/') *last_char = '\0' ;
-
- /* Now, start on the directory */
- if ((my_lock = Lock(dir, ACCESS_READ)) == NULL) {
- #ifdef DEBUG
- printf("browser: error trying to lock %s, IoErr: %d\n", dir, IoErr()) ;
- #endif
- done(20, "can't get lock on file") ;
- }
-
- if (!Examine(my_lock, &File_Info)) done(20, "can't examine file") ;
- if (File_Info . fib_DirEntryType < 0)
- done(20, "Add_Dir called with a non-directory") ;
-
- Menu_Add(name, TRUE) ;
-
- show_message("Loading Directory ");
-
- for (ExNext(my_lock, &File_Info), count = 0;
- IoErr() != ERROR_NO_MORE_ENTRIES;
- ExNext(my_lock, &File_Info), count++)
- if (File_Info . fib_DirEntryType < 0)
- /* file */
- Menu_Item_Add(File_Info . fib_FileName, ITEMENABLED, 0L, 0) ;
- else {
- /* directory */
- strcpy(Name_Buf, File_Info . fib_FileName) ;
- #ifdef DEBUG
- printf("dir name: %s\n", Name_Buf);
- #endif
- strcat(Name_Buf, "/");
- Menu_Item_Add(Name_Buf, ITEMENABLED, 0L, 0) ;
- }
- if (count == 0) Menu_Item_Add("EMPTY", 0L, 0L, 0) ;
-
- show_message("Directory Available ");
-
- /* Put everything back */
- if (*last_char == '\0') *last_char = '/' ;
- UnLock(my_lock) ;
- }
-
- /*
- * Display_File - given a directory path and file name, put the first page of
- * the file in the window.
- */
-
- long aprox_lines, file_size;
- long Page_Length = 22L;
-
-
- static
- Display_File(dir, name)
- char *dir, *name;
- {
- static char File_Name[LONGEST_NAME];
- FILE *fopen();
- long ftell();
- long i;
-
- /* Get the file name */
- strcpy(File_Name, dir);
- strcat(File_Name, name);
-
- if (infile != NULL)
- fclose(infile);
-
- if ((infile = fopen(File_Name, "r")) == NULL) {
- #ifdef DEBUG
- printf("Can't open File: %s\n", File_Name) ;
- #endif
- done(20, "can't open file") ;
- }
-
- /* set up the prop gadget for scrolling */
- fseek(infile, 0L, 2);
- file_size = ftell(infile);
- aprox_lines = file_size / AVG_LINE_LENGTH;
- prop.Flags = FREEVERT | AUTOKNOB;
- if (Page_Length >= aprox_lines)
- i = 0xAAAA; /* guess 66% for small files */
- else
- i = (Page_Length * 0x10000) / aprox_lines; /* FFFF=100% - 0000=0% */
-
- prop.VertBody = i;
- prop.VertPot = 0; /* always start at begin of file */
- fseek(infile, 0L, 0);
-
- /* enable the scroll bar */
- OnGadget((APTR)&Down_Gadget, My_Window, NULL);
- OnGadget((APTR)&Up_Gadget, My_Window, NULL);
- OnGadget((APTR)&Scroll_Gadget, My_Window, NULL);
-
- Page_File(DOWN_GADGET); /* Down from page 0 */
- }
-
- /*
- * Page_File - move the file up or down one "page"
- */
- static void
- Page_File(direction)
- int direction;
- {
- register long where;
- static char buffer[LONGEST_LINE];
- static char edited[84]; /* allow room for a tab at end */
- int end_flag = 0;
- long tabs, size, Line_Length;
- int i,j;
- long new_pos;
- char *p;
-
- if (infile == NULL) return ;
-
- Page_Length = (My_Window -> Height - 20) / 8 ;
- Line_Length = (My_Window -> Width - (3+FIRST)) / 8;
-
- switch (direction) {
- case UP_GADGET: /* Seek back one page */
- if (ftell(infile) < AVG_LINE_LENGTH * (Page_Length + 2))
- fseek(infile, 0L, 0);
- else {
- fseek(infile, (long) -Page_Length * AVG_LINE_LENGTH, 1) ;
- fgets(buffer, LONGEST_LINE, infile) ;
- }
- break;
-
- case DOWN_GADGET:
- /* we are already down one screen, just print from where we are */
- break;
-
- case SCROLL_GADGET:
- /* compute new position based on the users scroll bar pot */
- new_pos = (file_size * prop.VertPot) / 0x10000;
-
- #ifdef DEBUG
- printf("file size: %ld, new pos:%ld\n", file_size, new_pos);
- #endif
-
- /* if at end of file, back up 1/2 page */
- if (new_pos >= file_size)
- new_pos = file_size - ((Page_Length / 2) * AVG_LINE_LENGTH);
- fseek(infile, new_pos, 0);
-
- /* discard a partial line */
- if (new_pos)
- fgets(buffer, LONGEST_LINE, infile);
- break;
-
- default:
- done(20, "Illegal argument to Page_File");
- }
-
-
- /* now put out one page's worth of the file's data */
- for (where = 17, j = Page_Length; j--; where += 8) {
- Move(My_Window -> RPort, FIRST, where) ;
-
- /* blank the buffer first */
- for (i = 0; i < 80; i++)
- edited[i] = ' ';
-
- if (!end_flag) {
- if (fgets(buffer, LONGEST_LINE, infile) == NULL)
- end_flag = TRUE;
- else {
- size = strlen(buffer);
-
- /* remove the newline */
- buffer[size-1] = '\0';
- size--;
-
- p = buffer;
- size = 0;
-
- /* edit the buffer for tabs and non-printables */
- while(*p) {
- if (*p == '\t') {
- do {
- edited[size++] = ' ';
- } while(size&3);
- } else if(*p < ' ') {
- edited[size++] = '^';
- edited[size++] = *p + '@';
- } else
- edited[size++] = *p;
-
- p++;
-
- /* mark the line as longer than the window */
- if (size >= Line_Length) {
- edited[size-1] = '>';
- break;
- }
- }
- }
- }
- Text(My_Window -> RPort, edited, Line_Length);
- } /* for 1 to size of window */
- }
-
- /*
- * done - just close everything that's open, and exit.
- */
- static
- done(how, why)
- int how;
- char *why;
- {
-
- if (My_Window) {
- ClearMenuStrip(My_Window) ;
- Menu_Clear() ;
- CloseWindow(My_Window) ;
- }
- if (GfxBase) CloseLibrary(GfxBase) ;
- if (IntuitionBase) CloseLibrary(IntuitionBase) ;
- if (infile) fclose(infile) ;
-
- if (why)
- printf("browser: %s\n", why) ;
- (void) OpenWorkBench() ;
- exit(how) ;
- }
-
- show_message(s)
- char *s;
- {
- Move(My_Window -> RPort, FIRST, 17L);
- Text(My_Window -> RPort, s, (long) strlen(s));
- Move(My_Window -> RPort, FIRST, 25L);
- Text(My_Window -> RPort, " ", 20L);
- }
-