From a123725a12e948d78badb2cb686d38548f1c633b Mon Sep 17 00:00:00 2001
From: Albert Cervin <albert@acervin.com>
Date: Thu, 6 Apr 2023 23:23:46 +0200
Subject: Implement window handling

Also implement searching.

fix undo boundaries

when it checked for other save point, it used && instead of == which
caused it to overwrite other types.

Fix bytes vs chars bug in text_get_region
---
 src/undo.c | 181 -------------------------------------------------------------
 1 file changed, 181 deletions(-)
 delete mode 100644 src/undo.c

(limited to 'src/undo.c')

diff --git a/src/undo.c b/src/undo.c
deleted file mode 100644
index 2780557..0000000
--- a/src/undo.c
+++ /dev/null
@@ -1,181 +0,0 @@
-#include "undo.h"
-#include "string.h"
-#include "vec.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-
-void undo_init(struct undo_stack *undo, uint32_t initial_capacity) {
-  undo->top = INVALID_TOP;
-  undo->undo_in_progress = false;
-  VEC_INIT(&undo->records, initial_capacity);
-}
-
-void undo_clear(struct undo_stack *undo) {
-  undo->top = INVALID_TOP;
-  VEC_CLEAR(&undo->records);
-}
-
-void undo_destroy(struct undo_stack *undo) {
-  VEC_FOR_EACH(&undo->records, struct undo_record * rec) {
-    if (rec->type == Undo_Delete && rec->delete.data != NULL &&
-        rec->delete.nbytes > 0) {
-      free(rec->delete.data);
-    }
-  }
-
-  undo_clear(undo);
-
-  VEC_DESTROY(&undo->records);
-}
-
-uint32_t undo_push_boundary(struct undo_stack *undo,
-                            struct undo_boundary boundary) {
-
-  VEC_APPEND(&undo->records, struct undo_record * rec);
-  rec->type = Undo_Boundary;
-  rec->boundary = boundary;
-
-  // we can only have one save point
-  if (boundary.save_point) {
-    VEC_FOR_EACH(&undo->records, struct undo_record * rec) {
-      if (rec->type && Undo_Boundary && rec->boundary.save_point) {
-        rec->boundary.save_point = false;
-      }
-    }
-  }
-
-  if (!undo->undo_in_progress) {
-    undo->top = VEC_SIZE(&undo->records) - 1;
-  }
-
-  return VEC_SIZE(&undo->records) - 1;
-}
-
-bool pos_equal(struct position *a, struct position *b) {
-  return a->row == b->row && a->col == b->col;
-}
-
-uint32_t undo_push_add(struct undo_stack *undo, struct undo_add add) {
-
-  // "compress"
-  if (!VEC_EMPTY(&undo->records) &&
-      VEC_BACK(&undo->records)->type == Undo_Add &&
-      pos_equal(&VEC_BACK(&undo->records)->add.end, &add.begin)) {
-    VEC_BACK(&undo->records)->add.end = add.end;
-  } else {
-    VEC_APPEND(&undo->records, struct undo_record * rec);
-    rec->type = Undo_Add;
-    rec->add = add;
-  }
-
-  if (!undo->undo_in_progress) {
-    undo->top = VEC_SIZE(&undo->records) - 1;
-  }
-
-  return VEC_SIZE(&undo->records) - 1;
-}
-
-uint32_t undo_push_delete(struct undo_stack *undo, struct undo_delete delete) {
-  VEC_APPEND(&undo->records, struct undo_record * rec);
-  rec->type = Undo_Delete;
-  rec->delete = delete;
-
-  if (!undo->undo_in_progress) {
-    undo->top = VEC_SIZE(&undo->records) - 1;
-  }
-
-  return VEC_SIZE(&undo->records) - 1;
-}
-
-void undo_begin(struct undo_stack *undo) { undo->undo_in_progress = true; }
-
-void undo_next(struct undo_stack *undo, struct undo_record **records_out,
-               uint32_t *nrecords_out) {
-  *nrecords_out = 0;
-  *records_out = NULL;
-
-  if (VEC_EMPTY(&undo->records)) {
-    return;
-  }
-
-  if (undo->top == INVALID_TOP) {
-    // reset back to the top (redo)
-    undo->top = VEC_SIZE(&undo->records) - 1;
-  }
-
-  uint32_t nrecords = 1;
-  struct undo_record *current = &VEC_ENTRIES(&undo->records)[undo->top];
-
-  // skip any leading boundaries
-  while (undo->top > 0 && current->type == Undo_Boundary) {
-    ++nrecords;
-    --undo->top;
-    current = &VEC_ENTRIES(&undo->records)[undo->top];
-  }
-
-  // find the next boundary
-  while (undo->top > 0 && current->type != Undo_Boundary) {
-    ++nrecords;
-    --undo->top;
-    current = &VEC_ENTRIES(&undo->records)[undo->top];
-  }
-
-  if (nrecords > 0) {
-    *records_out = calloc(nrecords, sizeof(struct undo_record));
-    *nrecords_out = nrecords;
-
-    struct undo_record *dest = *records_out;
-
-    // copy backwards
-    for (uint32_t reci = undo->top + nrecords, outi = 0; reci > undo->top;
-         --reci, ++outi) {
-      dest[outi] = VEC_ENTRIES(&undo->records)[reci - 1];
-    }
-  }
-
-  if (undo->top > 0) {
-    --undo->top;
-  } else {
-    undo->top = INVALID_TOP;
-  }
-}
-
-void undo_end(struct undo_stack *undo) { undo->undo_in_progress = false; }
-
-uint32_t undo_size(struct undo_stack *undo) { return VEC_SIZE(&undo->records); }
-uint32_t undo_current_position(struct undo_stack *undo) { return undo->top; }
-
-size_t rec_to_str(struct undo_record *rec, char *buffer, size_t n) {
-  switch (rec->type) {
-  case Undo_Add:
-    return snprintf(buffer, n, "add { begin: (%d, %d) end: (%d, %d)}",
-                    rec->add.begin.row, rec->add.begin.col, rec->add.end.row,
-                    rec->add.end.col);
-  case Undo_Delete:
-    return snprintf(buffer, n, "delete { pos: (%d, %d), ptr: 0x%p, nbytes: %d}",
-                    rec->delete.pos.row, rec->delete.pos.col, rec->delete.data,
-                    rec->delete.nbytes);
-  default:
-    return snprintf(buffer, n, "boundary { save_point: %s }",
-                    rec->boundary.save_point ? "yes" : "no");
-  }
-}
-
-const char *undo_dump(struct undo_stack *undo) {
-  uint32_t left = 8192;
-  const char *buf = malloc(left);
-  char *pos = (char *)buf;
-  pos[0] = '\0';
-
-  char rec_buf[256];
-  VEC_FOR_EACH_INDEXED(&undo->records, struct undo_record * rec, reci) {
-    rec_to_str(rec, rec_buf, 256);
-    uint32_t written = snprintf(pos, left, "%d: [%s]%s\n", reci, rec_buf,
-                                reci == undo->top ? " <- top" : "");
-    left = written > left ? 0 : left - written;
-    pos += written;
-  }
-
-  return buf;
-}
-- 
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