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c02182e3a3
emailler/apps/edit.c
Bobbi Webber-Manners 9376dce5dd Change return type of main() to void, to avoid warning.
2020-07-19 20:25:49 -04:00

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/////////////////////////////////////////////////////////////////////////////
// Prototype of text editor
// Bobbi July 2020
/////////////////////////////////////////////////////////////////////////////
// Note use my fork of cc65 to get a flashing cursor!!
// TODO: Improve status line, refresh it properly
// TODO: Minor bug - can delete more chars from status line than should be able to
// TODO: Should be smarter about redrawing when updating selection!!!
// TODO: Doesn't check for error cases when calling gap buffer functions
// TODO: Make use of aux mem
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <conio.h>
#include <ctype.h>
#include <peekpoke.h>
#define NCOLS 80 // Width of editing screen
#define NROWS 22 // Height of editing screen
#define CURSORROW 10 // Row cursor is initially shown on (if enough text)
#define PROMPT_ROW NROWS + 1 // Row where input prompt is shown
#define EOL '\r' // For ProDOS
#define BELL 0x07
#define BACKSPACE 0x08
#define CURDOWN 0x0a
#define RETURN 0x0d
#define NORMAL 0x0e
#define INVERSE 0x0f
#define NOMOUSETXT 0x1b
#define HOME 0x19
#define CLRLINE 0x1a
#define ESC 0x1b
#define MOUSETXT 0x1b
#define CLREOL 0x1d
#define DELETE 0x7f
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
#define BUFSZ (20 * 1024)
char gapbuf[BUFSZ];
char padding = 0; // To null terminate for strstr()
uint16_t gapbegin = 0;
uint16_t gapend = BUFSZ - 1;
uint8_t rowlen[NROWS]; // Number of chars on each row of screen
char filename[80] = "";
char userentry[80] = "";
char search[80] = "";
char replace[80] = "";
// Interface to read_char_update_pos()
uint8_t do_print, modified;
uint16_t pos, startsel, endsel;
uint8_t row, col;
uint8_t cursrow, curscol; // Cursor position is kept here by draw_screen()
uint8_t quit_to_email; // If 1, launch EMAIL.SYSTEM on quit
uint8_t modified; // If 1, file contents have been modified
// The order of the cases matters!
enum selmode {SEL_NONE, SEL_COPY2, SEL_MOVE2, SEL_DEL, SEL_MOVE, SEL_COPY};
enum selmode mode;
// Mousetext Open-Apple
char openapple[] = "\x0f\x1b""A\x18\x0e";
/*
* Return number of bytes of freespace in gapbuf
*/
#define FREESPACE() (gapend - gapbegin + 1)
/*
* Return number of bytes of data in gapbuf
*/
#define DATASIZE() (gapbegin + (BUFSZ - 1 - gapend))
/*
* Obtain current position in gapbuf
* This is the positon where the next character will be inserted
*/
#define GETPOS() (gapbegin)
/*
* Put cursor at beginning of PROMPT_ROW
*/
#pragma code-name (push, "LC")
void goto_prompt_row(void) {
uint8_t i;
putchar(HOME);
for (i = 0; i < PROMPT_ROW; ++i)
putchar(CURDOWN);
gotoxy(1, PROMPT_ROW);
}
#pragma code-name (pop)
/*
* Prompt for a name in the bottom line of the screen
* Returns number of chars read.
* prompt - Message to display before > prompt
* is_file - if 1, restrict chars to those allowed in ProDOS filename
* Returns number of chars read, or 255 if ESC pressed
*/
#pragma code-name (push, "LC")
uint8_t prompt_for_name(char *prompt, uint8_t is_file) {
uint16_t i;
char c;
cursor(0);
goto_prompt_row();
putchar(CLREOL);
printf("%c%s>%c", INVERSE, prompt, NORMAL);
gotox(2 + strlen(prompt));
i = 0;
while (1) {
c = cgetc();
if (is_file && !isalnum(c) && (c != RETURN) && (c != BACKSPACE) &&
(c != DELETE) && (c != ESC) && (c != '.') && (c != '/')) {
putchar(BELL);
continue;
}
switch (c) {
case RETURN:
goto done;
case BACKSPACE:
case DELETE:
if (i > 0) {
gotox(wherex() - 1);
cputc(' ');
gotox(wherex() - 1);
--i;
} else
putchar(BELL);
break;
case ESC:
userentry[0] = '\0';
i = 255;
goto esc_pressed;
default:
cputc(c);
userentry[i++] = c;
}
if (i == 79)
goto done;
}
done:
userentry[i] = '\0';
esc_pressed:
putchar(CLRLINE);
gotoxy(curscol, cursrow);
cursor(1);
return i;
}
#pragma code-name (pop)
/*
* Prompt ok?
*/
#pragma code-name (push, "LC")
char prompt_okay(char *msg) {
char c;
cursor(0);
goto_prompt_row();
putchar(CLREOL);
printf("%c%sSure? (y/n)%c", INVERSE, msg, NORMAL);
while (1) {
c = cgetc();
if ((c == 'y') || (c == 'Y') || (c == 'n') || (c == 'N'))
break;
putchar(BELL);
}
if ((c == 'y') || (c == 'Y'))
c = 1;
else
c = 0;
putchar(CLRLINE);
gotoxy(curscol, cursrow);
cursor(1);
return c;
}
#pragma code-name (pop)
/*
* Error message
*/
#pragma code-name (push, "LC")
void show_error(char *msg) {
cursor(0);
goto_prompt_row();
putchar(BELL);
printf("%c%s [Press Any Key]%c", INVERSE, msg, NORMAL);
cgetc();
putchar(CLRLINE);
gotoxy(curscol, cursrow);
cursor(1);
}
#pragma code-name (pop)
/*
* Info message
*/
#pragma code-name (push, "LC")
void show_info(char *msg) {
cursor(0);
goto_prompt_row();
printf("%c%s%c", INVERSE, msg, NORMAL);
gotoxy(curscol, cursrow);
cursor(1);
}
#pragma code-name (pop)
/*
* Insert a character into gapbuf at current position
* c - character to insert
* Returns 0 on success, 1 on failure (insufficient space)
*/
uint8_t insert_char(char c) {
if (FREESPACE()) {
gapbuf[gapbegin++] = c;
return 0;
}
return 1;
}
/*
* Delete the character to the left of the current position
* Returns 0 on success, 1 on failure (nothing to delete)
*/
uint8_t delete_char(void) {
if (gapbegin == 0)
return 1;
--gapbegin;
}
/*
* Delete the character to the right of the current position
* Returns 0 on success, 1 on failure (nothing to delete)
*/
uint8_t delete_char_right(void) {
if (gapend == BUFSZ - 1)
return 1;
++gapend;
}
/*
* Obtain the next character (to the right of the current position)
* and advance the position.
* c - character is returned throught this pointer
* Returns 0 on success, 1 if at end of the buffer.
*/
uint8_t get_char(char *c) {
if (gapend == BUFSZ - 1)
return 1;
*c = gapbuf[gapbegin++] = gapbuf[++gapend];
return 0;
}
/*
* Move the current position
* pos - position to which to move
* Returns 0 on success, 1 if pos is invalid
*/
#pragma code-name (push, "LC")
uint8_t jump_pos(uint16_t pos) {
if (pos > BUFSZ - 1)
return 1;
if (pos == GETPOS())
return 0;
if (pos > GETPOS())
do {
gapbuf[gapbegin++] = gapbuf[++gapend];
} while (pos > GETPOS());
else
do {
gapbuf[gapend--] = gapbuf[--gapbegin];
} while (pos < GETPOS());
return 0;
}
#pragma code-name (pop)
/*
* Go to next tabstop
*/
#pragma code-name (push, "LC")
uint8_t next_tabstop(uint8_t col) {
return (col / 8) * 8 + 8;
}
#pragma code-name (pop)
/*
* Load a file from disk into the gapbuf
* filename - name of file to load
* Returns 0 on success
* 1 if file can't be opened
*/
#pragma code-name (push, "LC")
uint8_t load_file(char *filename) {
char c;
uint8_t i;
FILE *fp = fopen(filename, "r");
if (!fp)
return 1;
goto_prompt_row();
gapbegin = 0;
gapend = BUFSZ - 1;
col = 0;
while (!feof(fp)) {
c = fgetc(fp);
switch (c) {
case '\r': // Native Apple2 files
case '\n': // UNIX files
col = 0;
gapbuf[gapbegin++] = '\r';
break;
case '\t':
c = next_tabstop(col) - col;
for (i = 0; i < c; ++i)
gapbuf[gapbegin++] = ' ';
col += c;
break;
default:
++col;
gapbuf[gapbegin++] = c;
}
if (FREESPACE() < 1000) {
fclose(fp);
show_error("File truncated");
return 0;
}
if ((gapbegin % 1000) == 0)
cputc('.');
}
--gapbegin; // Eat EOF character
fclose(fp);
return 0;
}
#pragma code-name (pop)
/*
* Save gapbuf to file
* filename - name of file to load
* Returns 0 on success
* 1 if file can't be opened
*/
#pragma code-name (push, "LC")
uint8_t save_file(char *filename) {
char c;
uint16_t p = gapbegin;
FILE *fp = fopen(filename, "w");
if (!fp)
return 1;
jump_pos(0);
goto_prompt_row();
while (get_char(&c) == 0) {
fputc(c, fp);
if ((gapbegin % 1000) == 0)
cputc('.');
}
fclose(fp);
jump_pos(p);
return 0;
}
#pragma code-name (pop)
/*
* Read next char from gapbuf[] and update state.
* Returns 1 on EOL, 0 otherwise
* If do_print is set, print char on the screen.
* Interface is via the following globals:
* do_print - if 1, update screen
* pos - position in buffer, advanced by one
* row, col - position on screen
* rowlen[] - length of each screen row in chars
*/
uint8_t read_char_update_pos(void) {
char c;
if ((pos >= startsel) && (pos <= endsel))
revers(1);
else
revers(0);
if ((c = gapbuf[pos++]) == EOL) {
revers(0);
if (do_print) {
rowlen[row] = col + 1;
putchar(CLREOL);
putchar('\r');
}
++row;
col = 0;
return 1;
}
if (do_print)
cputc(c);
++col;
if (do_print)
rowlen[row] = col;
if (col == NCOLS) {
++row;
col = 0;
}
revers(0);
return 0;
}
/*
* Draw screenful of text
*/
void draw_screen(void) {
uint16_t startpos;
uint8_t rowsabove, cursorrow;
// Initialize all rows to length 0 to cover those rows that may have
// no text and would otherwise be unitialized.
for (rowsabove = 0; rowsabove < NROWS; ++rowsabove)
rowlen[rowsabove] = 0;
revers(0);
// First we have to scan back to work out where in the buffer to
// start drawing on the screen at the top left. This is at most
// NROWS * NCOLS chars.
startpos = gapbegin;
if (startpos > NROWS * NCOLS)
startpos -= NROWS * NCOLS;
else
startpos = 0;
// Format the text and work out the number of rows it takes up
pos = startpos;
row = col = 0;
do_print = 0;
while (pos < gapbegin)
read_char_update_pos();
rowsabove = row; // Number of complete rows above cursor
if (rowsabove <= CURSORROW) {
pos = 0;
cursorrow = rowsabove;
} else {
cursorrow = CURSORROW;
// Now repeat the formatting of the text, eating the first
// (rowsabove - cursorrow) lines
pos = startpos;
row = col = 0;
while (row < (rowsabove - cursorrow))
read_char_update_pos();
}
// Finally actually write the text to the screen!
videomode(VIDEOMODE_80COL);
clrscr();
row = col = 0;
do_print = 1;
while (pos < gapbegin)
read_char_update_pos();
curscol = col;
cursrow = row;
// Now write the text after the cursor up to the end of the screen
pos = gapend + 1;
while ((pos < BUFSZ) && (row < NROWS))
read_char_update_pos();
goto_prompt_row();
printf("%s-? Help ", openapple);
gotox(10);
revers(1);
if (strlen(filename)) {
cprintf(" %c File:%s", modified ? '*' : ' ', filename);
for (startpos = 0; startpos < 62 - strlen(filename); ++startpos)
cputc(' ');
} else {
cprintf(
" File:NONE ");
}
gotoxy(curscol, cursrow);
cursor(1);
}
/*
* Scroll screen up and update rowlen[]
*/
void scroll_up() {
draw_screen();
}
/*
* Scroll screen down and update rowlen[]
*/
void scroll_down() {
draw_screen();
}
/*
* Update screen after delete_char_right()
*/
void update_after_delete_char_right(void) {
uint8_t eol = 0;
uint8_t i;
col = curscol;
row = cursrow;
do_print = 1;
// Print rest of line up to EOL
pos = gapend + 1;
while (!eol && (pos < BUFSZ) && (row < NROWS)) {
i = col;
eol = read_char_update_pos();
}
// If necessary, print rest of screen
if ((gapbuf[gapend] == EOL) || (i == NCOLS - 1)) {
while ((pos < BUFSZ) && (row < NROWS))
read_char_update_pos();
putchar(CLREOL);
// Erase the rest of the screen (if any)
for (i = row + 1; i < NROWS; ++i) {
gotoxy(0, i);
putchar(CLRLINE);
}
}
gotoxy(curscol, cursrow);
cursor(1);
}
/*
* Update screen after delete_char()
*/
void update_after_delete_char(void) {
uint8_t eol = 0;
uint8_t i;
col = curscol;
row = cursrow;
if (gapbuf[gapbegin] == EOL) {
// Special handling if we deleted an EOL
if (row > 0)
col = rowlen[--row] - 1;
else {
scroll_up();
return;
}
} else {
// Erase char to left of cursor & update row, col
gotox(wherex() - 1);
cputc(' ');
gotox(wherex() - 1);
if (col > 0)
--col;
else {
col = 0;
if (row > 0)
--row;
else {
scroll_up();
return;
}
}
}
curscol = col;
cursrow = row;
gotoxy(curscol, cursrow);
do_print = 1;
// Print rest of line up to EOL
pos = gapend + 1;
while (!eol && (pos < BUFSZ) && (row < NROWS)) {
i = col;
eol = read_char_update_pos();
}
// If necessary, print rest of screen
if ((gapbuf[gapbegin] == EOL) || (i == NCOLS - 1)) {
while ((pos < BUFSZ) && (row < NROWS))
read_char_update_pos();
putchar(CLREOL);
// Erase the rest of the screen (if any)
for (i = row + 1; i < NROWS; ++i) {
gotoxy(0, i);
putchar(CLRLINE);
}
}
gotoxy(curscol, cursrow);
cursor(1);
}
/*
* Update screen after insert_char()
*/
void update_after_insert_char(void) {
uint8_t eol = 0;
uint8_t prevcol;
col = curscol;
row = cursrow;
// Print character just inserted
pos = gapbegin - 1;
do_print = 1;
read_char_update_pos();
curscol = col;
cursrow = row;
gotoxy(curscol, cursrow);
if (cursrow == NROWS) {
scroll_down();
return;
}
// Print rest of line up to EOL
pos = gapend + 1;
while (!eol && (pos < BUFSZ) && (row < NROWS)) {
prevcol = col;
eol = read_char_update_pos();
}
// If necessary, print rest of screen
if ((gapbuf[gapbegin - 1] == EOL) || (prevcol == 0))
while ((pos < BUFSZ) && (row < NROWS))
read_char_update_pos();
gotoxy(curscol, cursrow);
cursor(1);
}
/*
* Move the cursor left
*/
#pragma code-name (push, "LC")
void cursor_left(void) {
if (gapbegin > 0)
gapbuf[gapend--] = gapbuf[--gapbegin];
else {
putchar(BELL);
gotoxy(curscol, cursrow);
return;
}
if (curscol == 0) {
if (cursrow == 0) {
scroll_up();
if (cursrow == 0) {
putchar(BELL);
return;
}
}
--cursrow;
curscol = rowlen[cursrow];
} else
--curscol;
gotoxy(curscol, cursrow);
}
#pragma code-name (pop)
/*
* Move the cursor right
*/
#pragma code-name (push, "LC")
void cursor_right(void) {
if (gapend < BUFSZ - 1)
gapbuf[gapbegin++] = gapbuf[++gapend];
else {
putchar(BELL);
gotoxy(curscol, cursrow);
return;
}
++curscol;
if (curscol == rowlen[cursrow]) {
if (gapbuf[gapbegin - 1] == EOL) {
if (cursrow == NROWS - 1)
scroll_down();
++cursrow;
curscol = 0;
}
}
gotoxy(curscol, cursrow);
}
#pragma code-name (pop)
/*
* Move the cursor up
* Returns 1 if at top, 0 otherwise
*/
#pragma code-name (push, "LC")
uint8_t cursor_up(void) {
uint8_t i;
if (cursrow == 0) {
scroll_up();
if (cursrow == 0) {
putchar(BELL);
gotoxy(curscol, cursrow);
return 1;
}
}
for (i = 0; i < curscol; ++i)
gapbuf[gapend--] = gapbuf[--gapbegin];
--cursrow;
// Short line ...
if (curscol > rowlen[cursrow] - 1)
curscol = rowlen[cursrow] - 1;
for (i = 0; i < rowlen[cursrow] - curscol; ++i)
if (gapbegin > 0)
gapbuf[gapend--] = gapbuf[--gapbegin];
gotoxy(curscol, cursrow);
return 0;
}
#pragma code-name (pop)
/*
* Move the cursor down
* Returns 1 if at bottom, 0 otherwise
*/
#pragma code-name (push, "LC")
uint8_t cursor_down(void) {
uint8_t i;
if (cursrow == NROWS - 1)
scroll_down();
if ((gapbuf[gapend + rowlen[cursrow] - curscol] != EOL) &&
(rowlen[cursrow] != NCOLS))
return 1; // Last line
for (i = 0; i < rowlen[cursrow] - curscol; ++i) {
if (gapend < BUFSZ - 1)
gapbuf[gapbegin++] = gapbuf[++gapend];
else {
putchar(BELL);
return 1;
}
}
++cursrow;
// Short line ...
if (curscol > rowlen[cursrow] - 1)
curscol = rowlen[cursrow] - 1;
for (i = 0; i < curscol; ++i)
if (gapend < BUFSZ - 1)
gapbuf[gapbegin++] = gapbuf[++gapend];
gotoxy(curscol, cursrow);
return 0;
}
#pragma code-name (pop)
/*
* Goto beginning of line
*/
#pragma code-name (push, "LC")
void goto_bol(void) {
while (curscol > 0)
cursor_left();
}
#pragma code-name (pop)
/*
* Goto end of line
*/
#pragma code-name (push, "LC")
void goto_eol(void) {
while (curscol < rowlen[cursrow] - 1)
cursor_right();
}
#pragma code-name (pop)
/*
* Word left
*/
#pragma code-name (push, "LC")
void word_left(void) {
do {
cursor_left();
} while ((gapbuf[gapbegin] != ' ') && (gapbuf[gapbegin] != EOL) &&
(gapbegin > 0));
}
#pragma code-name (pop)
/*
* Word right
*/
#pragma code-name (push, "LC")
void word_right(void) {
do {
cursor_right();
} while ((gapbuf[gapbegin] != ' ') && (gapbuf[gapbegin] != EOL) &&
(gapend < BUFSZ - 1));
}
#pragma code-name (pop)
/*
* Jump forward 15 screen lines
*/
void page_down(void) {
uint8_t i;
for (i = 0; i < 15; ++i)
if (cursor_down() == 1)
break;
}
/*
* Jump back 15 screen lines
*/
void page_up(void) {
uint8_t i;
for (i = 0; i < 15; ++i)
if (cursor_up() == 1)
break;
}
/*
* Help screen
*/
#pragma code-name (push, "LC")
void help(void) {
revers(0);
cursor(0);
clrscr();
printf("EDITOR HELP\n\n");
printf(" %s-C Copy text (includes cut & paste)\n", openapple);
printf(" %s-D Delete text\n", openapple);
printf(" %s-F Find string\n", openapple);
printf(" %s-L Load file\n", openapple);
printf(" %s-M Move text (includes cut & paste)\n", openapple);
printf(" %s-N Name file\n", openapple);
printf(" %s-Q Quit\n", openapple);
printf(" %s-R Replace string\n", openapple);
printf(" %s-S Save file\n", openapple);
printf(" [Return] End paragraph\n");
printf(" [Delete] Delete char left\n");
printf(" %s-[Delete] Delete char right\n", openapple);
printf(" Arrows Move the cursor\n");
printf(" %s-Up arrow Page up\n", openapple);
printf(" %s-Down arrow Page down\n", openapple);
printf(" %s-Left arrow Word left\n", openapple);
printf(" %s-Right arrow Word right\n", openapple);
printf(" %s-< Beginning of line\n", openapple);
printf(" %s-> End of line\n", openapple);
printf(" [Tab] Go to next tabstop\n");
printf(" %s-1 to %s-9 Beginning of file through end of file\n", openapple, openapple);
printf(" [Press Any Key]");
cgetc();
}
#pragma code-name (pop)
/*
* Load EMAIL.SYSTEM to $2000 and jump to it
* (This code is in language card space so it can't possibly be trashed)
*/
#pragma code-name (push, "LC")
void load_email(void) {
revers(0);
clrscr();
exec("/IP65/EMAIL.SYSTEM", NULL);
}
#pragma code-name (pop)
/*
* Save file to disk, handle user interface
*/
#pragma code-name (push, "LC")
void save(void) {
if (strlen(filename) == 0) {
if (prompt_for_name("Save file", 1) == 255)
return; // If ESC pressed
if (strlen(userentry) == 0)
return;
strcpy(filename, userentry);
}
sprintf(userentry, "Save to %s - ", filename);
if (prompt_okay(userentry)) {
if (save_file(filename)) {
sprintf(userentry, "%cCan't save %s", filename);
show_error(userentry);
draw_screen();
} else {
modified = 0;
}
}
}
#pragma code-name (pop)
/*
* Main editor routine
*/
int edit(char *fname) {
char c, *p;
uint16_t pos, tmp;
uint8_t i;
videomode(VIDEOMODE_80COL);
if (fname) {
strcpy(filename, fname);
cprintf("Loading file %s ", filename);
if (load_file(filename)) {
sprintf(userentry, "Can't load %s", filename);
show_error(userentry);
strcpy(filename, "");
}
}
jump_pos(0);
pos = 0;
modified = 0;
startsel = endsel = 65535U;
mode = SEL_NONE;
draw_screen();
while (1) {
cursor(1);
c = cgetc();
switch (c) {
case 0x80 + '1': // Top
jump_pos(0);
draw_screen();
break;
case 0x80 + '2':
jump_pos(DATASIZE() / 8);
draw_screen();
break;
case 0x80 + '3':
jump_pos(2 * DATASIZE() / 8);
draw_screen();
break;
case 0x80 + '4':
jump_pos(3 * DATASIZE() / 8);
draw_screen();
break;
case 0x80 + '5':
jump_pos(4 * DATASIZE() / 8);
draw_screen();
break;
case 0x80 + '6':
jump_pos(5 * DATASIZE() / 8);
draw_screen();
break;
case 0x80 + '7':
jump_pos(6 * DATASIZE() / 8);
draw_screen();
break;
case 0x80 + '8':
jump_pos(7 * DATASIZE() / 8);
draw_screen();
break;
case 0x80 + '9': // Bottom
jump_pos(DATASIZE());
draw_screen();
break;
case 0x80 + 0x08: // OA-Left "Word left"
word_left();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x80 + 0x15: // OA-Right "Word right"
word_right();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x80 + ',': // OA-< "Home"
case 0x80 + '<':
goto_bol();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x80 + '.': // OA-> "End"
case 0x80 + '>':
goto_eol();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x8b: // OA-Up "Page Up"
page_up();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x8a: // OA-Down "Page Down"
page_down();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x80 + 'C': // OA-C "Copy"
case 0x80 + 'c': // OA-c
mode = SEL_COPY;
endsel = startsel = gapbegin;
draw_screen();
show_info("Copy: Go to end of selection, then [Return]");
break;
case 0x80 + 'D': // OA-D "Delete"
case 0x80 + 'd': // OA-d
mode = SEL_DEL;
endsel = startsel = gapbegin;
draw_screen();
show_info("Del: Go to end of selection, then [Return]");
break;
case 0x80 + 'R': // OA-R "Replace"
case 0x80 + 'r': // OA-r
tmp = 65535U;
case 0x80 + 'F': // OA-F "Find"
case 0x80 + 'f': // OA-F "Find"
++tmp;
sprintf(userentry, "Find (%s)", search);
if (prompt_for_name(userentry, 0) == 255)
break; // ESC pressed
if (strlen(userentry) > 0)
strcpy(search, userentry);
else {
if (strlen(search) == 0)
break;
sprintf(userentry, "Search for '%s' - ", search);
if (!prompt_okay(userentry))
break;
cursor_right();
}
if (tmp == 0) { // Replace mode
sprintf(userentry, "Replace (%s)", replace);
if (prompt_for_name(userentry, 0) == 255)
break; // ESC pressed
if (strlen(userentry) > 0)
strcpy(replace, userentry);
else {
if (strlen(replace) == 0)
break;
sprintf(userentry, "Replace with '%s' - ", replace);
if (!prompt_okay(userentry))
break;
}
}
p = strstr(gapbuf + gapend + 1, search);
if (!p) {
show_error("Not found, wrapping to top");
gapbuf[gapbegin] = '\0';
p = strstr(gapbuf, search);
if (!p) {
show_error("Not found");
break;
}
jump_pos(p - gapbuf);
if (tmp == 0) { // Replace mode
for (i = 0; i < strlen(search); ++i)
delete_char_right();
memcpy(gapbuf + gapbegin, replace, strlen(userentry));
gapbegin += strlen(replace);
}
draw_screen();
break;
}
jump_pos(gapbegin + p - (gapbuf + gapend + 1));
if (tmp == 0) { // Replace mode
for (i = 0; i < strlen(search); ++i)
delete_char_right();
memcpy(gapbuf + gapbegin, replace, strlen(userentry));
gapbegin += strlen(replace);
}
draw_screen();
break;
case 0x80 + 'L': // OA-L "Load"
case 0x80 + 'l':
if (prompt_for_name("Load File", 1) == 255)
break; // ESC pressed
if (strlen(userentry) == 0)
break;
strcpy(filename, userentry);
if (load_file(filename)) {
sprintf(userentry, "Can't load %s", filename);
show_error(userentry);
strcpy(filename, "");
} else {
jump_pos(0);
pos = 0;
modified = 0;
startsel = endsel = 65535U;
mode = SEL_NONE;
}
draw_screen();
break;
case 0x80 + 'M': // OA-M "Move"
case 0x80 + 'm': // OA-m
mode = SEL_MOVE;
endsel = startsel = gapbegin;
draw_screen();
show_info("Move: Go to end of selection, then [Return]");
break;
case 0x80 + 'N': // OA-N "Name"
case 0x80 + 'n': // OA-n
if (prompt_for_name("New filename", 1) == 255)
break; // ESC pressed
if (strlen(userentry) == 0)
break;
strcpy(filename, userentry);
sprintf(userentry, "Name set to %s", filename);
show_info(userentry);
break;
case 0x80 + 'Q': // OA-Q "Quit"
case 0x80 + 'q': // OA-q
if (modified)
save();
if (quit_to_email) {
if (prompt_okay("Quit to EMAIL - "))
load_email();
} else {
if (prompt_okay("Quit to ProDOS - ")) {
revers(0);
clrscr();
exit(0);
}
}
break;
case 0x80 + 'S': // OA-S "Save"
case 0x80 + 's': // OA-s
save();
draw_screen();
break;
case 0x80 + DELETE: // OA-Backspace
case 0x04: // Ctrl-D "DELETE"
if (mode == SEL_NONE) {
delete_char_right();
update_after_delete_char_right();
modified = 1;
}
break;
case 0x80 + '?': // OA-? "Help"
help();
draw_screen();
break;
case 0x0c: // Ctrl-L "REFRESH"
draw_screen();
break;
case DELETE: // DEL "BACKSPACE"
if (mode == SEL_NONE) {
delete_char();
update_after_delete_char();
modified = 1;
}
break;
case 0x09: // Tab
if (mode == SEL_NONE) {
c = next_tabstop(curscol) - curscol;
for (i = 0; i < c; ++i) {
insert_char(' ');
update_after_insert_char();
}
modified = 1;
}
break;
case 0x08: // Left
cursor_left();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x15: // Right
cursor_right();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x0b: // Up
cursor_up();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case 0x0a: // Down
cursor_down();
if (mode > SEL_MOVE2) {
endsel = gapbegin;
draw_screen();
}
break;
case EOL: // Return
if (mode == SEL_NONE) {
insert_char(c);
update_after_insert_char();
modified = 1;
} else {
if (startsel > endsel) {
tmp = endsel;
endsel = startsel;
startsel = tmp;
}
switch (mode) {
case SEL_DEL:
if (prompt_okay("Delete selection - ")) {
jump_pos(startsel);
gapend += (endsel - startsel);
}
startsel = endsel = 65535U;
mode = SEL_NONE;
modified = 1;
draw_screen();
break;
case SEL_COPY:
mode = SEL_COPY2;
show_info("Go to target, then [Return] to copy");
break;
case SEL_MOVE:
mode = SEL_MOVE2;
show_info("Go to target, then [Return] to move");
break;
case SEL_COPY2:
case SEL_MOVE2:
if ((gapbegin > startsel) && (gapbegin < endsel)) {
show_error("Bad destination");
goto copymove2_cleanup;
}
if ((endsel - startsel) > FREESPACE()) {
show_error("No space");
goto copymove2_cleanup;
}
sprintf(userentry, "%s selection - ", mode == SEL_COPY2 ? "Copy" : "Move");
if (prompt_okay(userentry)) {
if (gapbegin >= endsel)
memcpy(gapbuf + gapbegin, gapbuf + startsel, endsel - startsel);
else
memcpy(gapbuf + gapbegin,
gapbuf + gapend + startsel - gapbegin + 1, endsel - startsel);
gapbegin += (endsel - startsel);
if (mode == SEL_MOVE2) {
jump_pos((gapbegin >= endsel) ? startsel : endsel);
gapend += (endsel - startsel);
}
}
copymove2_cleanup:
startsel = endsel = 65535U;
mode = SEL_NONE;
modified = 1;
draw_screen();
break;
}
}
break;
default:
//printf("**%02x**", c);
if ((c >= 0x20) && (c < 0x80)) {
insert_char(c);
update_after_insert_char();
modified = 1;
}
}
}
}
void main(int argc, char *argv[]) {
if (argc == 2) {
quit_to_email = 1;
edit(argv[1]);
} else {
quit_to_email = 0;
edit(NULL);
}
}
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