started C implementation, created custom library for handling strings

2024-11-02 22:39:16 +00:00
parent 3d3eeb142f
commit 83a71ae0a1
10 changed files with 488 additions and 30 deletions
@@ -0,0 +1,82 @@
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include "dynstr.h"
+#include <ncurses.h>
+
+typedef struct {
+    int lines;
+    int screen_line;
+    int screen_col;
+    bool editmode;
+    String* buffer;
+} Editor;
+
+Editor new_editor() {
+    Editor e;
+    e.lines = 0;
+    e.screen_line = 0;
+    e.screen_col = 0;
+    e.editmode = false;
+    e.buffer = NULL;
+    return e;
+}
+
+Editor editor_from(char* input_string) {
+    // TODO: fix this function
+    Editor e;
+    e.lines = 0;
+    e.screen_line = 0;
+    e.screen_col = 0;
+    e.editmode = false;
+    e.buffer = NULL;
+    return e;
+}
+
+void move_cursor(Editor* self, int x, int y) {
+    if (x != 0
+        && self->screen_line + y >= 0
+        && self->screen_line + y <= self->lines) 
+    {
+        self->screen_line += y;
+        int line_width = str_len(&self->buffer[self->screen_line]);
+        if (self->screen_col > line_width) {
+            self->screen_col = line_width;
+        }
+    } else if (self->screen_col + x < 0) {
+        if (self->screen_line - 1 >= 0) {
+            self->screen_col = str_len(&self->buffer[self->screen_line]);
+        }
+    } else if (self->screen_col + x > str_len(&self->buffer[self->screen_line])) {
+        if (self->screen_line + 1 <= self->lines) {
+            self->screen_col = 0;
+            self->screen_line += 1;
+        }
+    } else if (x != 0) {
+        self->screen_col += x;
+    }
+    
+    move(self->screen_line, self->screen_col);
+}
+
+void delchar(Editor* self) {
+    str_remove(&self->buffer[self->screen_line], self->screen_col);
+    delch();
+}
+
+void addchar(Editor* self, char c) {
+    insch(c);
+    // insert the character into the string at the given index
+    if (self->screen_line == self->lines) {
+        // reallocate self->buffer to be 1 larger
+        self->lines++;
+        self->buffer = realloc(self->buffer, sizeof(String) * (self->lines + 1));
+    }
+    str_insert(&self->buffer[self->screen_line], self->screen_col, c);
+    move_cursor(self, 1, 0);
+}
+
+String* to_string(Editor* self) {
+
+}
+