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Coninued working on page overflow

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This commit is contained in:
Aadhavan Srinivasan
2023-04-21 08:11:55 -05:00
parent 9524ba4df9
commit 563271d1b2
1 changed files with 13 additions and 1 deletions
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14
editor.c
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@@ -6,6 +6,8 @@
#include <stdbool.h> #include <stdbool.h>
#include <unistd.h> #include <unistd.h>
int index_to_start = 0;
typedef struct Buffer_struct Buffer; typedef struct Buffer_struct Buffer;
struct Buffer_struct { struct Buffer_struct {
char* text; char* text;
@@ -83,6 +85,13 @@ void buffer_left(Buffer* buffer) {
} }
void scroll_page_down_handler(Buffer* buffer) {
while (*(buffer->start + index_to_start) != '\n') {
index_to_start++;
}
}
void page_down_handler(Buffer* buffer) { void page_down_handler(Buffer* 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. */
@@ -92,6 +101,10 @@ 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)
@@ -116,7 +129,6 @@ void sigint_handler(int dummy) {
} }
int main(int argc, char** argv) { int main(int argc, char** argv) {
int index_to_start = 0;
signal(SIGINT,sigint_handler); signal(SIGINT,sigint_handler);
Buffer* buffer = new_buffer(10); Buffer* buffer = new_buffer(10);