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podwrite.c
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podwrite.c
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/*
* Copyright (C) 2005 Jonathan Bettencourt (jonrelay)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pz.h"
#include "mlist.h"
#include "appearance.h"
#include "textinput.h"
/* START FUNCTION PROTOTYPES */
/* These were in podwrite.h, but I decided to rid
myself of that file to make my life easier. */
void podwrite_input_mode(void);
void podwrite_move_mode(void);
void podwrite_scroll_mode(void);
void podwrite_exit(void);
void podwrite_multiline_GrText(GR_WINDOW_ID wid, GR_GC_ID gc, int x, int y, int w, int h, char *t, int cursorpos, int scroll);
void podwrite_draw_scrollbar(GR_WINDOW_ID wid, GR_GC_ID gc, int y, int w, int h, int screen_items, int num_items, int sel);
void podwrite_save_callback(void);
void podwrite_save(void);
void podwrite_close_menu(void);
static void podwrite_menu_do_draw();
static int podwrite_menu_do_keystroke(GR_EVENT * event);
void podwrite_new_menu_window();
void podwrite_open_menu(void);
void podwrite_text_exit(void);
void podwrite_text_output_char(int ch);
void podwrite_draw(void);
int podwrite_handle_event(GR_EVENT *event);
void new_podwrite_window_with_text(char * t);
void new_podwrite_window_with_file(char * filename);
void new_podwrite_window(void);
/* END FUNCTION PROTOTYPES */
static int podwrite_mode = 0;
static int podwrite_linecount = 0;
static int podwrite_screenlines = 0;
static int podwrite_scroll = 0;
static int podwrite_cursor_out_of_bounds = 0;
static char * podwrite_saved_text;
static char * podwrite_saved_filename = 0;
static int podwrite_saved_stuff[4];
static GR_WINDOW_ID podwrite_menu_wid;
static GR_GC_ID podwrite_menu_gc;
static menu_st *podwrite_menuz;
static int podwrite_menu_no_auto_close = 0;
void podwrite_input_mode(void)
{
podwrite_mode = 0;
}
void podwrite_move_mode(void)
{
podwrite_mode = 1;
}
void podwrite_scroll_mode(void)
{
podwrite_mode = 2;
}
void podwrite_exit(void)
{
if (podwrite_saved_filename) {
free(podwrite_saved_filename);
podwrite_saved_filename = 0;
}
text_exit_continue();
}
void podwrite_clear(void)
{
if (DIALOG_MESSAGE_T2(_("Clear"), _("Clear all text?"), _("No"), _("Yes"), 10)==1) {
text_clear_buffer();
text_set_iposition(0);
podwrite_linecount = 0;
podwrite_scroll = 0;
podwrite_cursor_out_of_bounds = 0;
} else {
podwrite_menu_no_auto_close = 1;
}
}
/*
Multi-line GrText - just like GrText, but draws multiple lines.
*/
void podwrite_multiline_GrText(GR_WINDOW_ID wid, GR_GC_ID gc, int x, int y, int w, int h, char *t, int cursorpos, int scroll)
{
char * sot; /* start of text */
char * curtextptr;
int currentLine = 0;
int screenlines = 0;
int coob = 0; /* Cursor Out Of Bounds, or iPodLinux dev; you decide */
GR_SIZE width, height, base;
GrGetGCTextSize(gc, " ", 1, GR_TFUTF8, &width, &height, &base);
screenlines = h / height;
sot = t;
curtextptr = t;
if ((cursorpos >= 0) && (*curtextptr == '\0')) {
/* text is empty, draw the cursor at initial position */
GrSetGCForeground(gc, GRAY);
GrLine(wid, gc, x, y-base, x, y+height-base);
GrSetGCForeground(gc, appearance_get_color(CS_FG));
}
while (*curtextptr != '\0') {
char * sol; /* start of line */
sol = curtextptr;
/* find the line break */
while (1) {
if ((*curtextptr == '\n')||(*curtextptr == '\r')) {
curtextptr++;
break;
} else if (*curtextptr == '\0') {
break;
}
GrGetGCTextSize(gc, sol, curtextptr - sol + 1, GR_TFASCII, &width, &height, &base);
if (width > w) {
/* backtrack to the last word */
char *optr;
for (optr=curtextptr; optr>sol; optr--) {
if (isspace(*optr)||(*optr=='\t')||(*optr=='-')) {
curtextptr=optr;
curtextptr++;
break;
}
}
break;
}
curtextptr++;
}
/* if the line is in the viewable area, draw it */
if ( ((currentLine - scroll) >= 0) && ((currentLine - scroll) < screenlines) ) {
GrSetGCForeground(gc, appearance_get_color(CS_FG));
if ((*(curtextptr-1) == '\n')||(*(curtextptr-1) == '\r')) {
/* line ends with a newline, so don't display the newline */
GrText(wid, gc, x, y + ((currentLine-scroll)*height), sol, curtextptr-sol-1, GR_TFUTF8);
} else {
/* display the whole line */
GrText(wid, gc, x, y + ((currentLine-scroll)*height), sol, curtextptr-sol, GR_TFUTF8);
}
GrSetGCForeground(gc, GRAY);
if ((cursorpos >= sol-sot) && (cursorpos < curtextptr-sot)) {
/* cursor is on the line, but not at the very end */
if (cursorpos == (sol-sot)) {
width = 0;
} else {
GrGetGCTextSize(gc, sol, cursorpos-(sol-sot), GR_TFUTF8, &width, &height, &base);
}
GrLine(wid, gc, x+width, y+((currentLine-scroll)*height)-base, x+width, y+((currentLine-scroll+1)*height)-base);
} else if ((cursorpos == curtextptr-sot) && (*curtextptr == '\0')) {
/* cursor is not only at the very end of the line, but the very end of the text */
if ((*(curtextptr-1) == '\n')||(*(curtextptr-1) == '\r')) {
/* last character of the text is a newline, so display the cursor on the next line */
GrLine(wid, gc, x, y+((currentLine-scroll+1)*height)-base, x, y+((currentLine-scroll+2)*height)-base);
if ((currentLine - scroll + 1) == screenlines) { coob = 1; }
} else {
/* display the cursor normally */
GrGetGCTextSize(gc, sol, cursorpos-(sol-sot), GR_TFUTF8, &width, &height, &base);
GrLine(wid, gc, x+width, y+((currentLine-scroll)*height)-base, x+width, y+((currentLine-scroll+1)*height)-base);
}
}
GrSetGCForeground(gc, appearance_get_color(CS_FG));
if ( ((currentLine - scroll) == 0) && (cursorpos < sol-sot) ) {
coob = -1; /* cursor is before the viewable area */
} else if ( ((currentLine - scroll + 1) == screenlines) && (cursorpos >= curtextptr-sot) ) {
coob = 1; /* cursor is after the viewable area */
}
}
currentLine++;
}
if ( (*curtextptr == '\0') && ((*(curtextptr-1) == '\n') || (*(curtextptr-1) == '\r')) && (t[0] != 0) ) {
currentLine++; /* while loop doesn't count trailing newline as another line */
}
/* podwrite-specific; remove or edit if using in another context */
podwrite_linecount = currentLine;
podwrite_screenlines = screenlines;
podwrite_cursor_out_of_bounds = coob;
}
void podwrite_draw_scrollbar(GR_WINDOW_ID wid, GR_GC_ID gc, int y, int w, int h, int screen_items, int num_items, int sel)
{
/* ripped from mlist.c with minor changes */
int per = screen_items * 100 / num_items;
int height = (h-2) * (per < 3 ? 3 : per) / 100;
int y_top = ((((h-3) - height) * 100) * sel / (num_items-1)) / 100 + y + 1;
int y_bottom = y_top + height;
/* only draw if appropriate */
if(screen_items >= num_items) { return; }
/* draw the containing box */
GrSetGCForeground(gc, appearance_get_color(CS_SCRLBDR));
GrRect(wid, gc, w - 8, y, 8, h - 1);
/* erase the scrollbar */
GrSetGCForeground(gc, appearance_get_color(CS_SCRLCTNR));
GrFillRect(wid, gc, w-7, y+1, 6, y_top - (y+1));
GrFillRect(wid, gc, w-7, y_bottom, 6, (h-3) - y_bottom);
/* draw the bar */
GrSetGCForeground(gc, appearance_get_color(CS_SCRLKNOB));
GrFillRect(wid, gc, w-7, y_top, 6, height);
/* return to black */
GrSetGCForeground(gc, BLACK);
}
/*
PodWrite open/save handling.
*/
void podwrite_save_callback(void)
{
/* write to the file */
char * buf;
FILE * textout;
buf = strdup(text_get_buffer());
if (podwrite_saved_filename) {
free(podwrite_saved_filename);
podwrite_saved_filename = 0;
}
if (buf[0]) {
textout = fopen(buf, "w");
fprintf(textout, "%s", podwrite_saved_text);
fclose(textout);
}
/* restore podwrite window */
new_podwrite_window_with_text(podwrite_saved_text);
/* restore podwrite state */
if ( (podwrite_saved_filename = (char *)malloc(strlen(buf)+2)) != NULL ) {
strcpy(podwrite_saved_filename, buf);
}
podwrite_mode = 0;
podwrite_linecount = podwrite_saved_stuff[0];
podwrite_scroll = podwrite_saved_stuff[1];
text_set_iposition(podwrite_saved_stuff[2]);
text_draw();
free(buf);
}
void podwrite_save(void)
{
/* hold on tight, we're going to call a text window from inside a text window */
/*
Normally the menu handler would close the menu right after calling
this function. In this case we can't close the menu window right
after calling this because it causes a Podzilla window management
catastrophe. Podzilla requires that windows be closed in the order
they are created, because it uses a stack for event handlers I think.
At this point, the window order is Podzilla Menu; PodWrite; PodWrite
Menu. So we have to close the PodWrite Menu, then PodWrite, then
create a new text box. Setting the following variable prevents the
menu handler from attempting to close the menu again.
*/
podwrite_menu_no_auto_close = 1;
/* save podwrite state */
podwrite_saved_text = strdup(text_get_buffer());
podwrite_saved_stuff[0] = podwrite_linecount;
podwrite_saved_stuff[1] = podwrite_scroll;
podwrite_saved_stuff[2] = text_get_iposition();
/* close menu window */
podwrite_close_menu();
/* close podwrite window */
text_exit_continue();
/* now bring up a normal text box for save command */
pz_draw_header(_("Save to..."));
if (podwrite_saved_filename) {
new_text_box(0, 0, 0, 0, podwrite_saved_filename, podwrite_save_callback);
} else {
new_text_box(0, 0, 0, 0, "/mnt/Notes/", podwrite_save_callback);
}
}
/*
PodWrite menu handling.
Uses mlist.c for the actual handling, but otherwise separate from
the main Podzilla menu system.
/!\ This menu is programmed to close after selecting an item,
so putting things like submenus and options in it is completely useless.
*/
void podwrite_close_menu(void)
{
menu_destroy_all(podwrite_menuz);
pz_close_window(podwrite_menu_wid);
GrDestroyGC(podwrite_menu_gc);
}
static item_st podwrite_menu[] = {
{N_("Return to PodWrite"), podwrite_input_mode, ACTION_MENU},
{N_("Move Cursor"), podwrite_move_mode, ACTION_MENU},
{N_("Scroll"), podwrite_scroll_mode, ACTION_MENU},
{N_("Clear"), podwrite_clear, ACTION_MENU},
{N_("Save..."), podwrite_save, ACTION_MENU},
{N_("Exit PodWrite"), podwrite_exit, ACTION_MENU},
{0}
};
static void podwrite_menu_do_draw()
{
/* window is focused */
if (podwrite_menu_wid == GrGetFocus()) {
pz_draw_header(podwrite_menuz->title);
menu_draw(podwrite_menuz);
}
}
static int podwrite_menu_do_keystroke(GR_EVENT * event)
{
int ret = 0;
switch (event->type) {
case GR_EVENT_TYPE_TIMER:
menu_draw_timer(podwrite_menuz);
break;
case GR_EVENT_TYPE_KEY_DOWN:
switch (event->keystroke.ch) {
case '\r':
case '\n':
podwrite_menu_no_auto_close = 0;
podwrite_menuz = menu_handle_item(podwrite_menuz, podwrite_menuz->sel);
podwrite_menu_do_draw();
ret |= KEY_CLICK;
if (podwrite_menu_no_auto_close == 0) {
podwrite_close_menu();
}
break;
case 'l':
if (menu_shift_selected(podwrite_menuz, -1)) {
menu_draw(podwrite_menuz);
ret |= KEY_CLICK;
}
break;
case 'r':
if (menu_shift_selected(podwrite_menuz, 1)) {
menu_draw(podwrite_menuz);
ret |= KEY_CLICK;
}
break;
case 'm':
menu_destroy_all(podwrite_menuz);
pz_close_window(podwrite_menu_wid);
GrDestroyGC(podwrite_menu_gc);
break;
default:
ret |= KEY_UNUSED;
break;
}
break;
default:
ret |= EVENT_UNUSED;
break;
}
return ret;
}
void podwrite_new_menu_window()
{
GrGetScreenInfo(&screen_info);
podwrite_menu_gc = pz_get_gc(1);
GrSetGCUseBackground(podwrite_menu_gc, GR_TRUE);
GrSetGCForeground(podwrite_menu_gc, appearance_get_color(CS_FG));
GrSetGCBackground(podwrite_menu_gc, appearance_get_color(CS_BG));
podwrite_menu_wid = pz_new_window(0, HEADER_TOPLINE + 1, screen_info.cols,
screen_info.rows - (HEADER_TOPLINE + 1), podwrite_menu_do_draw,
podwrite_menu_do_keystroke);
GrSelectEvents(podwrite_menu_wid, GR_EVENT_MASK_EXPOSURE| GR_EVENT_MASK_KEY_UP|
GR_EVENT_MASK_KEY_DOWN | GR_EVENT_MASK_TIMER);
podwrite_menuz = menu_init(podwrite_menu_wid, _("PodWrite"), 0, 1,
screen_info.cols, screen_info.rows -
(HEADER_TOPLINE + 1), NULL, podwrite_menu, ASCII);
GrMapWindow(podwrite_menu_wid);
}
void podwrite_open_menu(void)
{
podwrite_new_menu_window();
}
/* PodWrite Event Handling */
int podwrite_check_bounds(void)
{
int s = podwrite_scroll;
if (podwrite_linecount < podwrite_screenlines) {
if (podwrite_scroll != 0) { podwrite_scroll = 0; }
} else {
if (podwrite_scroll > (podwrite_linecount-podwrite_screenlines)) { podwrite_scroll = podwrite_linecount-podwrite_screenlines; }
if (podwrite_cursor_out_of_bounds < 0) {
podwrite_scroll -= 2;
if (podwrite_scroll < 0) { podwrite_scroll = 0; }
} else if (podwrite_cursor_out_of_bounds > 0) {
podwrite_scroll += 2;
if (podwrite_scroll > (podwrite_linecount-podwrite_screenlines)) { podwrite_scroll = podwrite_linecount-podwrite_screenlines; }
if (podwrite_scroll < 0) { podwrite_scroll = 0; }
}
}
return (podwrite_scroll == s)?0:1;
}
void podwrite_text_exit(void)
{
/* text_output_byte(10);
text_draw();
if (podwrite_check_bounds() != 0) { text_draw(); } */
podwrite_open_menu();
}
void podwrite_text_output_char(int ch)
{
if ((ch == 10) || (ch == 13)) {
text_output_byte(10);
text_draw();
if (podwrite_check_bounds() != 0) { text_draw(); }
} else {
text_output_char_continue(ch);
}
}
/*
We used to have our text_exit replacement function
produce a newline, and no text_output_char replacement.
The default text_output_char calls text_exit when
called with a newline.
But the hold switch method for bringing up PodWrite's
menu was causing somebody grief, so I decided to fix
things and make PodWrite produce a newline in its
text_output_char replacement, and bring up its menu
in its text_exit replacement.
*/
int podwrite__scroll_sel(void)
{
if (podwrite_linecount <= podwrite_screenlines) {
return 0;
} else if ((podwrite_linecount > 46000) && (podwrite_scroll > podwrite_screenlines)) {
/* on the VERY rare occasion that you have loads of lines, prevent any chance of numeric overflow */
return podwrite_scroll+podwrite_screenlines-1;
} else {
return (podwrite_scroll*(podwrite_linecount-1))/(podwrite_linecount-podwrite_screenlines);
}
}
void podwrite_draw(void)
{
GrGetScreenInfo(&screen_info);
/* pz_draw_header(_("PodWrite")); */
GrClearWindow(text_get_bufwid(), GR_FALSE);
GrSetGCBackground(text_get_gc(), appearance_get_color(CS_BG));
GrSetGCForeground(text_get_gc(), appearance_get_color(CS_BG));
GrFillRect(text_get_bufwid(), text_get_gc(), 0, 0, text_get_width(), text_get_height());
GrSetGCForeground(text_get_gc(), appearance_get_color(CS_FG));
GrRect(text_get_bufwid(), text_get_gc(), 0, 0, text_get_width(), text_get_height());
podwrite_multiline_GrText(text_get_bufwid(), text_get_gc(), 5, 15,
screen_info.cols-18, screen_info.rows-text_optimum_height()-2,
text_get_buffer(), text_get_iposition(), podwrite_scroll);
podwrite_draw_scrollbar(text_get_bufwid(), text_get_gc(), 2,
screen_info.cols+1, screen_info.rows-text_optimum_height(),
podwrite_screenlines, podwrite_linecount, podwrite__scroll_sel());
text_draw_status(text_get_gc());
/* copy the buffer to the actual window */
GrCopyArea(text_get_wid(), text_get_gc(), 0, 0, text_get_width()+1, text_get_height()+1, text_get_bufwid(), 0, 0, MWROP_SRCCOPY);
}
int podwrite_handle_event(GR_EVENT *event)
{
if (podwrite_mode == 0) {
int ret;
ret = text_handle_event_continue(event);
GrFlush();
if (podwrite_check_bounds() != 0) { text_draw(); GrFlush(); }
return ret;
} else if (podwrite_mode == 1) {
if (event->type == GR_EVENT_TYPE_KEY_DOWN) {
switch (event->keystroke.ch) {
case 'l':
case 28:
if (text_get_iposition() > 0) {
text_output_char(28);
if (podwrite_check_bounds() != 0) { text_draw(); }
} else { return 0; }
break;
case 'r':
case 29:
if (text_get_iposition() < text_get_length()) {
text_output_char(29);
if (podwrite_check_bounds() != 0) { text_draw(); }
} else { return 0; }
break;
case '\n':
case '\r':
case 'd':
podwrite_input_mode();
break;
case 'w':
case 8:
text_set_iposition(0);
podwrite_scroll = 0;
text_draw();
break;
case 'f':
case 127:
text_set_iposition(text_get_length());
podwrite_scroll = podwrite_linecount-podwrite_screenlines;
if (podwrite_scroll < 0) { podwrite_scroll = 0; }
text_draw();
if (podwrite_check_bounds() != 0) { text_draw(); }
break;
case 'm':
/* case 'h': */
case 27:
podwrite_input_mode();
podwrite_open_menu();
break;
}
return 1;
}
} else if (podwrite_mode == 2) {
if (event->type == GR_EVENT_TYPE_KEY_DOWN) {
switch (event->keystroke.ch) {
case 'l':
case 28:
if (podwrite_scroll>0) {
podwrite_scroll--;
text_draw();
} else { return 0; }
break;
case 'r':
case 29:
if ( (podwrite_linecount > podwrite_screenlines) && (podwrite_scroll < (podwrite_linecount-podwrite_screenlines)) ) {
podwrite_scroll++;
text_draw();
} else { return 0; }
break;
case '\n':
case '\r':
case 'd':
podwrite_input_mode();
break;
case 'w':
podwrite_scroll = 0;
text_draw();
break;
case 'f':
podwrite_scroll = podwrite_linecount-podwrite_screenlines;
if (podwrite_scroll < 0) { podwrite_scroll = 0; }
text_draw();
break;
case 'm':
/* case 'h': */
case 27:
podwrite_input_mode();
podwrite_open_menu();
break;
}
return 1;
}
}
return 0;
}
void new_podwrite_window_with_text(char * t)
{
podwrite_mode = 0;
podwrite_linecount = 0;
podwrite_scroll = 0;
podwrite_cursor_out_of_bounds = 0;
if (podwrite_saved_filename) {
free(podwrite_saved_filename);
podwrite_saved_filename = 0;
}
GrGetScreenInfo(&screen_info);
new_text_box_x(-1, 20, screen_info.cols+2, screen_info.rows-19, t, NULL,
podwrite_draw, podwrite_text_output_char, podwrite_handle_event, podwrite_text_exit);
pz_draw_header(_("PodWrite"));
}
void new_podwrite_window_with_file(char * filename)
{
char *buf;
char tmp[512];
FILE *fp;
size_t file_len;
if ((fp = fopen(filename,"r"))==NULL) {
return;
}
fseek(fp, 0, SEEK_END);
file_len = ftell(fp);
rewind(fp);
if(file_len==0) {
buf = '\0';
while(fgets(tmp, 512, fp)!=NULL) {
if((buf = realloc(buf, ((buf=='\0'?0:strlen(buf)) +
512) * sizeof(char)))==NULL) {
fclose(fp);
return;
}
if(file_len==0) {
strncpy(buf, tmp, 512);
file_len=1;
} else
strncat(buf, tmp, 512);
}
}
else {
if((buf = calloc(file_len+1, 1))==NULL) {
fclose(fp);
return;
}
if(fread(buf, 1, file_len, fp)!=file_len)
pz_error(_("unknown read error, continuing"));
}
fclose(fp);
podwrite_mode = 0;
podwrite_linecount = 0;
podwrite_scroll = 0;
podwrite_cursor_out_of_bounds = 0;
if (podwrite_saved_filename) { free(podwrite_saved_filename); }
if ( (podwrite_saved_filename = (char *)malloc(strlen(filename)+2)) != NULL ) {
strcpy(podwrite_saved_filename, filename);
} else { podwrite_saved_filename = 0; }
GrGetScreenInfo(&screen_info);
new_text_box_x(-1, 20, screen_info.cols+2, screen_info.rows-19, buf, NULL,
podwrite_draw, podwrite_text_output_char, podwrite_handle_event, podwrite_text_exit);
text_set_iposition(0);
pz_draw_header(_("PodWrite"));
free(buf);
}
void new_podwrite_window(void)
{
podwrite_mode = 0;
podwrite_linecount = 0;
podwrite_scroll = 0;
podwrite_cursor_out_of_bounds = 0;
if (podwrite_saved_filename) {
free(podwrite_saved_filename);
podwrite_saved_filename = 0;
}
GrGetScreenInfo(&screen_info);
new_text_box_x(-1, 20, screen_info.cols+2, screen_info.rows-19, "", NULL,
podwrite_draw, podwrite_text_output_char, podwrite_handle_event, podwrite_text_exit);
pz_draw_header(_("PodWrite"));
}