moved code from header to source files

src/edit.c

@@ -0,0 +1,104 @@
+#include "tim.h"
+
+
+void TimEditState_init(TimEditState* e, i32 capacity, cstr initial_content){
+    e->length = tim_utf8_len(initial_content);
+    e->cursor = tim_utf8_len(initial_content);
+    e->capacity = capacity;
+    e->s = (char*)malloc(capacity + 1);
+    i32 byte_len = strlen(initial_content);
+    memcpy(e->s, initial_content, byte_len);
+    e->s[byte_len] = 0;
+}
+
+void edit_insert(TimEditState* e, cstr s) {
+    i32 dst_size = tim_ztrlen(e->s);
+    i32 src_size = tim_ztrlen(s);
+    if (dst_size + src_size < e->capacity) {
+        i32 len = tim_utf8_len(s); // usually 1, except when smashing keys
+        i32 cur = tim_utf8_pos(e->s, e->cursor);
+        memmove(e->s + cur + src_size, e->s + cur, dst_size - cur);
+        memmove(e->s + cur, s, src_size);
+        e->s[dst_size + src_size] = 0;
+        e->length += len;
+        e->cursor += len;
+    }
+}
+
+void edit_delete(TimEditState* e) {
+    i32 size = tim_ztrlen(e->s);
+    i32 cur  = tim_utf8_pos(e->s, e->cursor);
+    i32 len  = tim_utf8_pos(e->s + cur, 1);
+    if (size - cur > 0) {
+        memmove(e->s + cur, e->s + cur + len, size - cur);
+        e->length -= 1;
+    }
+}
+
+/// @return key id or 0
+static i32 edit_event(TimEditState* e, TimRect r) {
+    if (tim_is_mouse_click_over(r)) {
+        // take focus
+        tim.focus = e;
+        return 0;
+    }
+
+    if (tim.focus != e || tim.event.type != TimEvent_Key) {
+        // not focused or no key press
+        return 0;
+    }
+    tim.event.type = TimEvent_Void; // consume event
+
+    switch (tim.event.key) {
+    case TimKey_Escape:
+    case TimKey_Enter:
+        tim.focus = 0; // release focus
+        break;
+    case TimKey_Delete:
+        edit_delete(e);
+        break;
+    case TimKey_Backspace:
+        if (e->cursor > 0) {
+            e->cursor -= 1;
+            edit_delete(e);
+        }
+        break;
+    case TimKey_Left:
+        e->cursor -= (e->cursor > 0);
+        break;
+    case TimKey_Right:
+        e->cursor += (e->cursor < e->length);
+        break;
+    case TimKey_Home:
+        e->cursor = 0;
+        break;
+    case TimKey_End:
+        e->cursor = e->length;
+        break;
+    default:
+        if (tim.event.key >= ' ') {
+            edit_insert(e, tim.event.s);
+        }
+        break;
+    }
+
+    return tim.event.key;
+}
+
+i32 edit(TimEditState* e, i32 x, i32 y, i32 w, u64 color) {
+    TimRect r = tim_scope_rect_to_absolute(x, y, w, 3);
+
+    if (tim.event.type == TimEvent_Draw) {
+        tim_draw_box(r.x, r.y, r.w, r.h, color >> 16, color >> 8);
+        if (tim.focus == e) {
+            char* s = e->s + tim_utf8_pos(e->s, e->cursor - r.w + 4);
+            i32   cur = MIN(r.w - 4, e->cursor);
+            tim_draw_str(s, r.x + 2, r.y + 1, r.w - 3, color, color >> 8);
+            tim_draw_invert(r.x + cur + 2, r.y + 1, 1);
+        } else {
+            tim_draw_str(e->s, r.x + 2, r.y + 1, r.w - 3, color, color >> 8);
+        }
+    }
+
+    return edit_event(e, r);
+}