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Added a window within the stdscr, which is used for printing the text, as well as another 'status window'

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This commit is contained in:
Aadhavan Srinivasan
2023-04-22 18:37:38 -05:00
parent d4021068c8
commit 315245dd54
1 changed files with 28 additions and 12 deletions
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40
editor.c
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@@ -10,6 +10,8 @@
#define ctrl(x) ((x) & 0x1f) #define ctrl(x) ((x) & 0x1f)
int index_to_start = 0; int index_to_start = 0;
WINDOW* mainwin;
WINDOW* statusbar;
typedef struct Buffer_struct Buffer; typedef struct Buffer_struct Buffer;
struct Buffer_struct { struct Buffer_struct {
@@ -104,6 +106,10 @@ void scroll_page_down_handler(Buffer* buffer) {
} }
void page_down_handler(Buffer* buffer) { void page_down_handler(Buffer* buffer) {
if ((getcury(mainwin) + 1) == getmaxy(mainwin)) {
scroll_page_down_handler(buffer);
}
buffer_right(buffer); /* I must advance the cursor at least buffer_right(buffer); /* I must advance the cursor at least
once, so this hardcoded statement is fine. */ once, so this hardcoded statement is fine. */
@@ -112,10 +118,6 @@ void page_down_handler(Buffer* buffer) {
buffer_right(buffer); buffer_right(buffer);
} }
if ((getcury(stdscr) + 1) == getmaxy(stdscr)) {
scroll_page_down_handler(buffer);
}
/* You would think that I need to call 'buffer_right' once /* You would think that I need to call 'buffer_right' once
more, to advance the cursor onto the next line. In fact, if more, to advance the cursor onto the next line. In fact, if
you think about it, the place where the cursor (the rectangle) you think about it, the place where the cursor (the rectangle)
@@ -150,7 +152,7 @@ void page_up_handler(Buffer* buffer) {
} }
if ((getcury(stdscr) == 0) && (index_to_start > 0)) { if ((getcury(mainwin) == 0) && (index_to_start > 0)) {
scroll_page_up_handler(buffer); scroll_page_up_handler(buffer);
} }
@@ -183,8 +185,17 @@ void save_text_helper(Buffer* buffer,char* filename) {
void init_curses() { void init_curses() {
initscr(); initscr();
mainwin = newwin(getmaxy(stdscr)-1,getmaxx(stdscr),0,0);
statusbar = newwin(1,getmaxx(stdscr),getmaxy(stdscr)-1,0);
wattrset(statusbar,A_REVERSE);
mvwhline(statusbar,0,0,' ',getmaxx(statusbar));
mvwprintw(statusbar,0,0,"Welcome to Editor!");
wrefresh(statusbar);
noecho(); noecho();
keypad(stdscr,TRUE); keypad(stdscr,TRUE);
keypad(mainwin,TRUE);
raw(); raw();
// scrollok(stdscr,TRUE); // scrollok(stdscr,TRUE);
} }
@@ -221,7 +232,7 @@ int main(int argc, char** argv) {
int y, x; int y, x;
while (true) { while (true) {
clear(); wclear(mainwin);
int i=index_to_start; int i=index_to_start;
if ((buffer->start != buffer->text) || (buffer->gap_size != buffer->size)) { /* We don't want to print the string, if the if ((buffer->start != buffer->text) || (buffer->gap_size != buffer->size)) { /* We don't want to print the string, if the
@@ -230,28 +241,30 @@ int main(int argc, char** argv) {
while (i < buffer->size) { while (i < buffer->size) {
if ((buffer->start - buffer->text) == i) { /* If we have encountered if ((buffer->start - buffer->text) == i) { /* If we have encountered
the start of the gap */ the start of the gap */
getyx(stdscr,y,x); getyx(mainwin,y,x);
i += buffer->gap_size; i += buffer->gap_size;
} }
if (i >= buffer->size) { if (i >= buffer->size) {
break; break;
} }
addch(*(buffer->text + i)); waddch(mainwin,*(buffer->text + i));
i++; i++;
fprintf(logfile,"At line %d of %d\n",getcury(stdscr),getmaxy(stdscr)); fprintf(logfile,"At line %d of %d\n",getcury(mainwin),getmaxy(mainwin));
if (*(buffer->text + i) == '\n' && ((getcury(stdscr) + 1) == getmaxy(stdscr))) { if (*(buffer->text + i) == '\n' && ((getcury(mainwin) + 1) == getmaxy(mainwin))) {
fprintf(logfile,"Read newline\n"); fprintf(logfile,"Read newline\n");
break; break;
} }
} }
move(y,x); wmove(mainwin,y,x);
wrefresh(mainwin);
} }
ch = getch(); ch = wgetch(mainwin);
switch(ch) { switch(ch) {
case KEY_BACKSPACE: case KEY_BACKSPACE:
@@ -287,6 +300,9 @@ int main(int argc, char** argv) {
page_up_handler(buffer); page_up_handler(buffer);
break; break;
case ctrl(KEY_NPAGE):
abort();
case ctrl('s'): case ctrl('s'):
if (argc == 2) { if (argc == 2) {
save_text_helper(buffer,argv[1]); save_text_helper(buffer,argv[1]);