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nEdit.c
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/*
* nEdit
*
* nEdit.c
*
* Copyright (C) 1996-2021 by Ohno Tomoaki. All rights reserved.
* https://www.nakka.com/
*/
/* Include Files */
#define _INC_OLE
#include <windows.h>
#undef _INC_OLE
#include <tchar.h>
#ifdef OP_XP_STYLE
#include <uxtheme.h>
#include <vssym32.h>
#endif // OP_XP_STYLE
#include "nEdit.h"
#pragma comment(lib, "imm32.lib")
/* Define */
#define RESERVE_BUF 1024
#define RESERVE_INPUT 256
#define RESERVE_LINE 256
#define RESERVE_UNDO 256
#define DRAW_LEN 256
#define LINE_MAX 32768
#define TAB_STOP 8
// ホイールメッセージ
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 0x020A
#endif
// XPテーマ変更通知
#ifndef WM_THEMECHANGED
#define WM_THEMECHANGED 0x031A
#endif
#ifndef IS_HIGH_SURROGATE
#define IS_HIGH_SURROGATE(wch) (((wch) & 0xfc00) == 0xd800)
#define IS_LOW_SURROGATE(wch) (((wch) & 0xfc00) == 0xdc00)
#define IS_SURROGATE_PAIR(hs, ls) (IS_HIGH_SURROGATE(hs) && IS_LOW_SURROGATE(ls))
#endif
#ifdef UNICODE
#define IS_LEAD_TBYTE(tb) IS_HIGH_SURROGATE(tb)
#else
#define IS_LEAD_TBYTE(tb) IsDBCSLeadByte(tb)
#endif
#define SWAP(a, b) {a = b - a; b -= a; a += b;}
#define BUF_LEN (bf->buf_len + bf->input_len - bf->del_len - bf->ip_len)
/* Global Variables */
/* Local Function Prototypes */
static void *mem_alloc(const DWORD size);
static void *mem_calloc(const DWORD size);
static void mem_free(void **mem);
static BOOL string_to_clipboard(const HWND hWnd, const TCHAR *st, const TCHAR *en);
static void notify_message(const HWND hWnd, const BUFFER *bf, const int code);
static BOOL get_edit_rect(const HWND hWnd, const BUFFER *bf, RECT *rect);
static void set_scrollbar(const HWND hWnd, BUFFER *bf);
static void ensure_visible(const HWND hWnd, BUFFER *bf);
static BOOL is_lead_byte(const BUFFER *bf, TCHAR *p);
static int get_char_extent(BUFFER *bf, TCHAR *str, int *ret_len);
static TCHAR *char_next(const BUFFER *bf, TCHAR *p);
static TCHAR *char_prev(const BUFFER *bf, TCHAR *p);
static TCHAR *index_to_char(const BUFFER *bf, const DWORD index);
static DWORD char_to_index(const BUFFER *bf, const TCHAR *p);
static int index_to_line(const BUFFER *bf, const DWORD index);
static BOOL line_alloc(BUFFER *bf, const int i, const int size);
static BOOL line_move(BUFFER *bf, const int i, const int len);
static DWORD line_get(const BUFFER *bf, const int lindex);
static void line_set(BUFFER *bf, const int lindex, const DWORD len);
static void line_flush(BUFFER *bf);
static void line_add_length(BUFFER *bf, const int index, const int len);
static int line_get_length(const BUFFER *bf, const DWORD index);
static DWORD line_get_next_index(BUFFER *bf, const DWORD index);
static BOOL line_set_info(BUFFER *bf);
static int line_get_count(BUFFER *bf, const int lindex);
static int line_set_count(BUFFER *bf, const int lindex, const int old_cnt, const int line_cnt);
static void line_refresh(const HWND hWnd, const BUFFER *bf, const DWORD p, const DWORD r);
static BOOL undo_alloc(BUFFER *bf);
static void undo_free(BUFFER *bf, const int index);
static BOOL undo_set(BUFFER *bf, const int type, const DWORD st, const DWORD len);
static BOOL undo_exec(const HWND hWnd, BUFFER *bf);
static BOOL redo_exec(const HWND hWnd, BUFFER *bf);
static BOOL string_init(BUFFER *bf);
static BOOL string_set(const HWND hWnd, BUFFER *bf, const TCHAR *str, const DWORD len);
static BOOL string_insert(const HWND hWnd, BUFFER *bf, TCHAR *str, const int len, const BOOL insert_mode);
static void string_delete(const HWND hWnd, BUFFER *bf, DWORD st, DWORD en);
static void string_delete_char(const HWND hWnd, BUFFER *bf, DWORD st);
static BOOL string_flush(BUFFER *bf, const BOOL undo_flag);
static BOOL draw_init(const HWND hWnd, BUFFER *bf);
static void draw_free(BUFFER *bf);
static void draw_rect(const HWND hWnd, const HDC mdc, const BUFFER *bf, const int left, const int top, const int right, const int bottom);
static int draw_string(const HWND hWnd, const HDC mdc, const BUFFER *bf, const RECT *drect, const int left, const int top, const TCHAR *str, const int len, const BOOL sel);
static void draw_line(const HWND hWnd, const HDC mdc, BUFFER *bf, const int i, const int left, const int right);
static void caret_set_size(const HWND hWnd, BUFFER *bf);
static int caret_char_to_caret(const HDC mdc, BUFFER *bf, const int i, const DWORD cp);
static DWORD caret_point_to_caret(BUFFER *bf, const int x, const int y);
static void caret_get_token(BUFFER *bf);
static void caret_move(const HWND hWnd, BUFFER *bf, const int key);
static LRESULT CALLBACK nedit_proc(const HWND hWnd, const UINT msg, const WPARAM wParam, const LPARAM lParam);
/*
* mem_alloc - バッファを確保
*/
static void *mem_alloc(const DWORD size)
{
return LocalAlloc(LMEM_FIXED, size);
}
/*
* mem_calloc - 初期化してバッファを確保
*/
static void *mem_calloc(const DWORD size)
{
return LocalAlloc(LPTR, size);
}
/*
* mem_free - バッファを解放
*/
static void mem_free(void **mem)
{
if (*mem != NULL) {
LocalFree(*mem);
*mem = NULL;
}
}
/*
* string_to_clipboard - 文字列をクリップボードに設定
*/
static BOOL string_to_clipboard(const HWND hWnd, const TCHAR *st, const TCHAR *en)
{
HANDLE hMem;
TCHAR *buf;
if (OpenClipboard(hWnd) == FALSE) {
return FALSE;
}
if (EmptyClipboard() == FALSE) {
CloseClipboard();
return FALSE;
}
if ((hMem = GlobalAlloc(GHND, sizeof(TCHAR) * (en - st + 1))) == NULL) {
CloseClipboard();
return FALSE;
}
if ((buf = GlobalLock(hMem)) == NULL) {
GlobalFree(hMem);
CloseClipboard();
return FALSE;
}
CopyMemory(buf, st, sizeof(TCHAR) * (en - st));
*(buf + (en - st)) = TEXT('\0');
GlobalUnlock(hMem);
#ifdef UNICODE
SetClipboardData(CF_UNICODETEXT, hMem);
#else
SetClipboardData(CF_TEXT, hMem);
#endif
CloseClipboard();
return TRUE;
}
/*
* notify_message - 親ウィンドウに通知
*/
static void notify_message(const HWND hWnd, const BUFFER *bf, const int code)
{
SendMessage(GetParent(hWnd), WM_COMMAND, MAKEWPARAM(bf->id, code), (LPARAM)hWnd);
}
/*
* get_edit_rect - 描画領域の取得
*/
static BOOL get_edit_rect(const HWND hWnd, const BUFFER *bf, RECT *rect)
{
BOOL ret;
ret = GetClientRect(hWnd, rect);
rect->left += bf->left_margin;
rect->top += bf->top_margin;
rect->right -= bf->right_margin;
rect->bottom -= bf->bottom_margin;
return ret;
}
/*
* set_scrollbar - スクロールバーの設定
*/
static void set_scrollbar(const HWND hWnd, BUFFER *bf)
{
SCROLLINFO si;
RECT rect;
get_edit_rect(hWnd, bf, &rect);
// 横スクロールバー
if (bf->wordwrap == FALSE && (rect.right - rect.left) < bf->line_width) {
int width = bf->line_width / bf->char_width + 1;
EnableScrollBar(hWnd, SB_HORZ, ESB_ENABLE_BOTH);
bf->max_x = width - ((rect.right - rect.left) / bf->char_width);
bf->pos_x = (bf->pos_x < bf->max_x) ? bf->pos_x : bf->max_x;
ZeroMemory(&si, sizeof(SCROLLINFO));
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS | SIF_RANGE | SIF_PAGE;
si.nPage = (rect.right - rect.left) / bf->char_width;
si.nMax = width - 1;
si.nPos = bf->pos_x;
SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);
} else {
EnableScrollBar(hWnd, SB_HORZ, ESB_DISABLE_BOTH);
bf->pos_x = bf->max_x = 0;
ZeroMemory(&si, sizeof(SCROLLINFO));
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
si.nMax = (bf->wordwrap == TRUE) ? 0 : 1;
SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);
}
// 縦スクロールバー
if (((rect.bottom - rect.top) / bf->font_height) < bf->line_len) {
EnableScrollBar(hWnd, SB_VERT, ESB_ENABLE_BOTH);
bf->max_y = bf->line_len - ((rect.bottom - rect.top) / bf->font_height);
bf->pos_y = (bf->pos_y < bf->max_y) ? bf->pos_y : bf->max_y;
ZeroMemory(&si, sizeof(SCROLLINFO));
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS | SIF_RANGE | SIF_PAGE;
si.nPage = (rect.bottom - rect.top) / bf->font_height;
si.nMax = bf->line_len - 1;
si.nPos = bf->pos_y;
SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
} else {
EnableScrollBar(hWnd, SB_VERT, ESB_DISABLE_BOTH);
bf->pos_y = bf->max_y = 0;
ZeroMemory(&si, sizeof(SCROLLINFO));
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
si.nMax = 1;
SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
}
}
/*
* ensure_visible - キャレット位置を表示
*/
static void ensure_visible(const HWND hWnd, BUFFER *bf)
{
RECT rect;
int i;
int x, y;
get_edit_rect(hWnd, bf, &rect);
i = index_to_line(bf, bf->cp);
x = caret_char_to_caret(bf->mdc, bf, i, bf->cp) + (bf->pos_x * bf->char_width);
y = i;
// x
i = bf->pos_x;
if (x < (bf->pos_x + 5) * bf->char_width) {
bf->pos_x = x / bf->char_width - 5;
if (bf->pos_x < 0) {
bf->pos_x = 0;
}
}
if (x > ((bf->pos_x - 5) * bf->char_width) + (rect.right - rect.left)) {
bf->pos_x = x / bf->char_width - (rect.right - rect.left) / bf->char_width + 5;
if (bf->pos_x > bf->max_x) {
bf->pos_x = bf->max_x;
}
}
if (i != bf->pos_x) {
SetScrollPos(hWnd, SB_HORZ, bf->pos_x, TRUE);
ScrollWindowEx(hWnd, (i - bf->pos_x) * bf->char_width, 0, NULL, &rect, NULL, NULL, SW_INVALIDATE | SW_ERASE);
}
// y
i = bf->pos_y;
if (y < bf->pos_y) {
bf->pos_y = y;
}
if (y > bf->pos_y + (rect.bottom - rect.top) / bf->font_height - 1) {
bf->pos_y = y - (rect.bottom - rect.top) / bf->font_height + 1;
if (bf->pos_y > bf->max_y) {
bf->pos_y = bf->max_y;
}
}
if (i != bf->pos_y) {
SetScrollPos(hWnd, SB_VERT, bf->pos_y, TRUE);
ScrollWindowEx(hWnd, 0, (i - bf->pos_y) * bf->font_height, NULL, &rect, NULL, NULL, SW_INVALIDATE | SW_ERASE);
}
}
/*
* is_lead_byte - マルチバイトの先頭バイトかチェック
*/
static BOOL is_lead_byte(const BUFFER *bf, TCHAR *p)
{
if (IS_LEAD_TBYTE((TBYTE)*p) == TRUE && char_to_index(bf, char_next(bf, p)) < BUF_LEN) {
return TRUE;
}
return FALSE;
}
/*
* get_char_extent - 文字の描画幅の取得
*/
static int get_char_extent(BUFFER *bf, TCHAR *str, int *ret_len)
{
SIZE sz;
int ret = 0;
#ifdef UNICODE
*ret_len = (is_lead_byte(bf, str) == TRUE) ? 2 : 1;
if (*ret_len == 1 && HIBYTE(*str) == 0 && *(bf->cwidth + LOBYTE(*str)) != 0) {
ret = *(bf->cwidth + LOBYTE(*str));
} else {
GetTextExtentPoint32(bf->mdc, str, *ret_len, &sz);
ret = sz.cx;
if (*ret_len == 1 && HIBYTE(*str) == 0 && sz.cx < 256) {
*(bf->cwidth + LOBYTE(*str)) = (BYTE)sz.cx;
}
}
#else
*ret_len = (is_lead_byte(bf, str) == TRUE) ? 2 : 1;
if (*ret_len == 1 && *(bf->cwidth + (unsigned char)*str) != 0) {
ret = *(bf->cwidth + (unsigned char)*str);
} else {
GetTextExtentPoint32(bf->mdc, str, *ret_len, &sz);
ret = sz.cx;
if (*ret_len == 1 && sz.cx < 256) {
*(bf->cwidth + (unsigned char)*str) = (BYTE)sz.cx;
}
}
#endif
return ret;
}
/*
* char_next - 次の文字を取得
*/
static TCHAR *char_next(const BUFFER *bf, TCHAR *p)
{
if (bf->dp != NULL && p == bf->dp - 1) {
return (bf->dp + bf->del_len);
}
if (bf->ip != NULL) {
if (p == bf->ip - 1) {
return bf->input_buf;
} else if (p == bf->input_buf + bf->input_len - 1) {
return (bf->ip + bf->ip_len);
}
}
return (p + 1);
}
/*
* char_prev - 前の文字を取得
*/
static TCHAR *char_prev(const BUFFER *bf, TCHAR *p)
{
if (bf->dp != NULL && p == bf->dp + bf->del_len) {
return (bf->dp - 1);
}
if (bf->ip != NULL) {
if (p == (bf->ip + bf->ip_len)) {
return (bf->input_buf + bf->input_len - 1);
} else if (p == bf->input_buf) {
return (bf->ip - 1);
}
}
return (p - 1);
}
/*
* index_to_char - 文字インデックスから文字位置を取得
*/
static TCHAR *index_to_char(const BUFFER *bf, const DWORD index)
{
TCHAR *p;
if (bf->dp != NULL && index >= (DWORD)(bf->dp - bf->buf)) {
p = bf->buf + index + bf->del_len;
} else if (bf->ip != NULL && index >= (DWORD)(bf->ip - bf->buf)) {
if (index < (DWORD)(bf->ip - bf->buf + bf->input_len)) {
p = bf->input_buf + (index - (bf->ip - bf->buf));
} else {
p = bf->buf + index - bf->input_len + bf->ip_len;
}
} else {
p = bf->buf + index;
}
return p;
}
/*
* char_to_index - 文字位置から文字インデックスを取得
*/
static DWORD char_to_index(const BUFFER *bf, const TCHAR *p)
{
DWORD i;
if (bf->dp != NULL && p >= bf->dp) {
i = p - bf->buf - bf->del_len;
} else if (bf->ip != NULL && !(p >= bf->buf && p < bf->ip)) {
if (p >= bf->input_buf && p <= bf->input_buf + bf->input_len) {
i = (bf->ip - bf->buf) + (p - bf->input_buf);
} else {
i = (p - bf->buf) + bf->input_len - bf->ip_len;
}
} else {
i = p - bf->buf;
}
return i;
}
/*
* index_to_line - 文字インデックスから行位置を取得
*/
static int index_to_line(const BUFFER *bf, const DWORD index)
{
int low = 0;
int high = bf->line_len - 1;
int i;
while (low <= high) {
i = (low + high) / 2;
if (line_get(bf, i) > index) {
if (i > 0 && line_get(bf, i - 1) <= index) {
return (i - 1);
}
high = i - 1;
} else if (line_get(bf, i) < index) {
if (i < bf->line_len - 1 && line_get(bf, i + 1) > index) {
return i;
}
low = i + 1;
} else {
return i;
}
}
return (bf->line_len - 1);
}
/*
* line_alloc - 行情報の確保
*/
static BOOL line_alloc(BUFFER *bf, const int i, const int size)
{
int *ln;
bf->line_size += size;
if ((ln = mem_alloc(sizeof(int) * bf->line_size)) == NULL) {
return FALSE;
}
if (bf->line != NULL) {
CopyMemory(ln, bf->line, sizeof(int) * i);
mem_free(&bf->line);
}
bf->line = ln;
return TRUE;
}
/*
* line_move - 行情報の移動
*/
static BOOL line_move(BUFFER *bf, const int i, const int len)
{
int *ln;
if (bf->line_len + len + 1 > bf->line_size) {
// 追加
bf->line_size = bf->line_len + len + 1 + RESERVE_LINE;
if ((ln = mem_alloc(sizeof(int) * bf->line_size)) == NULL) {
return FALSE;
}
CopyMemory(ln, bf->line, sizeof(int) * i);
CopyMemory(ln + i + len, bf->line + i, sizeof(int) * (bf->line_len - i + 1));
mem_free(&bf->line);
bf->line = ln;
} else {
MoveMemory(bf->line + i + len, bf->line + i, sizeof(int) * (bf->line_len - i + 1));
}
bf->line_len += len;
if (bf->line_len + 1 < bf->line_size - RESERVE_LINE) {
// 解放
bf->line_size = bf->line_len + 1 + RESERVE_LINE;
if ((ln = mem_alloc(sizeof(int) * bf->line_size)) == NULL) {
return FALSE;
}
CopyMemory(ln, bf->line, sizeof(int) * (bf->line_len + 1));
mem_free(&bf->line);
bf->line = ln;
}
return TRUE;
}
/*
* line_get - 行頭インデックスの取得
*/
static DWORD line_get(const BUFFER *bf, const int lindex)
{
if (bf->line_add_len != 0 && bf->line_add_index <= lindex) {
return (*(bf->line + lindex) + bf->line_add_len);
}
return *(bf->line + lindex);
}
/*
* line_set - 行頭インデックスを設定
*/
static void line_set(BUFFER *bf, const int lindex, const DWORD len)
{
if (bf->line_add_len != 0 && bf->line_add_index <= lindex) {
*(bf->line + lindex) = len - bf->line_add_len;
} else {
*(bf->line + lindex) = len;
}
}
/*
* line_flush - 行情報の反映
*/
static void line_flush(BUFFER *bf)
{
int i;
for (i = bf->line_add_index; i <= bf->line_len; i++) {
*(bf->line + i) += bf->line_add_len;
}
bf->line_add_index = 0;
bf->line_add_len = 0;
}
/*
* line_add_length - 行情報に文字数を追加
*/
static void line_add_length(BUFFER *bf, const int index, const int len)
{
int i;
if (bf->line_add_index != 0 && bf->line_add_index < index) {
for (i = bf->line_add_index; i < index; i++) {
*(bf->line + i) += bf->line_add_len;
}
}
bf->line_add_index = index;
bf->line_add_len += len;
}
/*
* line_get_length - 行の長さを取得
*/
static int line_get_length(const BUFFER *bf, const DWORD index)
{
int i, j;
i = line_get(bf, index_to_line(bf, index) + 1) - 1;
j = line_get(bf, index_to_line(bf, index));
for (; i >= j &&
(*index_to_char(bf, i) == TEXT('\r') || *index_to_char(bf, i) == TEXT('\n')); i--);
return (i - j + 1);
}
/*
* line_get_next_index - 次の行頭の文字インデックスを取得
*/
static DWORD line_get_next_index(BUFFER *bf, const DWORD index)
{
TCHAR *p;
DWORD word = -1;
DWORD i;
int line_size;
int cnt = 0;
int offset = bf->left_margin;
int word_offset;
int width;
int tab;
int clen;
if (bf->wordwrap == TRUE && bf->width <= 0) {
return BUF_LEN;
}
line_size = bf->width - bf->right_margin;
for (i = index; i < BUF_LEN; i++) {
p = index_to_char(bf, i);
switch (*p) {
case TEXT('\r'):
case TEXT('\n'):
// new line
if (*p == TEXT('\r') && (i + 1) < BUF_LEN && *(char_next(bf, p)) == TEXT('\n')) {
i++;
}
if (bf->wordwrap == FALSE && bf->line_width < offset + bf->right_margin) {
bf->line_width = offset + bf->right_margin;
}
return i;
case TEXT('\t'):
// tab
tab = bf->tab_stop * bf->char_width - ((offset - bf->left_margin) % (bf->tab_stop * bf->char_width));
if (tab < bf->char_width) {
tab += bf->tab_stop * bf->char_width;
}
if ((bf->wordwrap == TRUE && offset + tab > line_size) ||
(bf->line_max > 0 && cnt + bf->tab_stop - (cnt % bf->tab_stop) > bf->line_max)) {
// 折り返し
if (word != -1 && word != index && clen == 1) {
i = word;
offset = word_offset;
}
if (bf->wordwrap == FALSE && bf->line_width < offset + bf->right_margin) {
bf->line_width = offset + bf->right_margin;
}
return (i + ((cnt == 0) ? 1 : 0));
} else {
cnt += bf->tab_stop - (cnt % bf->tab_stop);
offset += tab;
}
word = -1;
break;
default:
// char
width = get_char_extent(bf, p, &clen);
if ((bf->wordwrap == TRUE && offset + width > line_size) ||
(bf->line_max > 0 && cnt + 1 > bf->line_max)) {
// 折り返し
if (word != -1 && word != index && clen == 1) {
i = word;
offset = word_offset;
}
if (bf->wordwrap == FALSE && bf->line_width < offset + bf->right_margin) {
bf->line_width = offset + bf->right_margin;
}
return (i + ((cnt == 0) ? clen : 0));
} else {
cnt += clen;
offset += width;
}
if (clen == 2) {
i++;
word = -1;
} else if (*p != TEXT(' ')) {
if (word == (DWORD)-1) {
// 単語の開始位置
word = i;
word_offset = offset;
}
} else {
word = -1;
}
break;
}
}
if (bf->wordwrap == FALSE && bf->line_width < offset + bf->right_margin) {
// 1行の長さ (スクロールバー用)
bf->line_width = offset + bf->right_margin;
}
return i;
}
/*
* line_set_info - 行情報の設定
*/
static BOOL line_set_info(BUFFER *bf)
{
DWORD index;
int i = 1;
index = line_get_next_index(bf, 0);
while (index < BUF_LEN) {
switch (*index_to_char(bf, index)) {
case TEXT('\r'):
case TEXT('\n'):
// 行頭のインデックスを設定
line_set(bf, i, index + 1);
if (++i >= bf->line_size && line_alloc(bf, i, BUF_LEN / 30) == FALSE) {
return FALSE;
}
index++;
break;
default:
// 行頭のインデックスを設定 (折り返し)
line_set(bf, i, index);
if (++i >= bf->line_size && line_alloc(bf, i, BUF_LEN / 30) == FALSE) {
return FALSE;
}
break;
}
index = line_get_next_index(bf, index);
}
line_set(bf, i, index);
bf->line_len = i;
return TRUE;
}
/*
* line_get_count - 論理行数の取得
*/
static int line_get_count(BUFFER *bf, const int lindex)
{
TCHAR *p;
int i;
for (i = lindex + 1; i < bf->line_len; i++) {
p = index_to_char(bf, line_get(bf, i) - 1);
if (*p == TEXT('\r') || *p == TEXT('\n')) {
// 論理行の終端
break;
}
}
return (i - lindex);
}
/*
* line_set_count - 行情報の設定
*/
static int line_set_count(BUFFER *bf, const int lindex, const int old_cnt, const int line_cnt)
{
TCHAR *p;
DWORD index;
int i = lindex;
int rcnt = 0;
index = line_get(bf, lindex - 1);
while (1) {
index = line_get_next_index(bf, index);
if ((i - lindex) >= old_cnt) {
// 挿入行を移動
line_move(bf, i, 1);
}
p = index_to_char(bf, index);
if (*p == TEXT('\r') || *p == TEXT('\n')) {
// 行頭のインデックスを設定
index++;
line_set(bf, i++, index);
if (++rcnt >= line_cnt) {
break;
}
} else {
// 行頭のインデックスを設定 (折り返し)
line_set(bf, i++, index);
if (index >= BUF_LEN) {
break;
}
}
}
if ((i - lindex) < old_cnt) {
// 行情報の削除
line_move(bf, i + old_cnt - (i - lindex), -(old_cnt - (i - lindex)));
}
return (i - lindex);
}
/*
* line_refresh - 指定範囲文字列のある行を再描画対象にする
*/
static void line_refresh(const HWND hWnd, const BUFFER *bf, const DWORD p, const DWORD r)
{
RECT rect;
int i, j;
// 文字位置から行のインデックスを取得
i = index_to_line(bf, p);
if (p == r) {
j = i;
} else {
j = index_to_line(bf, r);
}
if (i > j) {
SWAP(i, j);
}
i -= bf->pos_y;
j -= bf->pos_y;
// 再描画
get_edit_rect(hWnd, bf, &rect);
if (i * bf->font_height > (rect.bottom - rect.top) || j * bf->font_height + bf->font_height < 0) {
return;
}
if (j * bf->font_height + bf->font_height < (rect.bottom - rect.top)) {
rect.bottom = j * bf->font_height + bf->font_height + bf->top_margin;
}
if (i * bf->font_height > 0) {
rect.top = i * bf->font_height + bf->top_margin;
}
InvalidateRect(hWnd, &rect, FALSE);
}
/*
* undo_alloc - UNDOの確保
*/
static BOOL undo_alloc(BUFFER *bf)
{
UNDO *ud;
bf->undo_size += RESERVE_UNDO;
if ((ud = mem_calloc(sizeof(UNDO) * bf->undo_size)) == NULL) {
return FALSE;
}
if (bf->undo != NULL) {
CopyMemory(ud, bf->undo, sizeof(UNDO) * bf->undo_len);
mem_free(&bf->undo);
}
bf->undo = ud;
return TRUE;
}
/*
* undo_free - UNDOの解放
*/
static void undo_free(BUFFER *bf, const int index)
{
int i;
for (i = index; i < bf->undo_size; i++) {
(bf->undo + i)->type = 0;
mem_free(&(bf->undo + i)->buf);
}
}
/*
* undo_set - UNDOのセット
*/
static BOOL undo_set(BUFFER *bf, const int type, const DWORD index, const DWORD len)
{
undo_free(bf, bf->undo_len);
if (bf->undo_len + 1 >= bf->undo_size && undo_alloc(bf) == FALSE) {
return FALSE;
}
(bf->undo + bf->undo_len)->type = type;
(bf->undo + bf->undo_len)->st = index;
(bf->undo + bf->undo_len)->len = len;
switch (type) {
case UNDO_TYPE_INPUT:
// 入力
break;
case UNDO_TYPE_DELETE:
// 削除
if (((bf->undo + bf->undo_len)->buf = mem_alloc(sizeof(TCHAR) * len)) == NULL) {
return FALSE;
}
CopyMemory((bf->undo + bf->undo_len)->buf, bf->buf + index, sizeof(TCHAR) * len);
break;
}
bf->undo_len++;
return TRUE;
}
/*
* undo_exec - UNDOの実行
*/
static BOOL undo_exec(const HWND hWnd, BUFFER *bf)
{
int i;
string_flush(bf, TRUE);
i = bf->undo_len - 1;
if (i < 0) {
return TRUE;
}
bf->sp = bf->cp = (bf->undo + i)->st;
switch ((bf->undo + i)->type) {
case UNDO_TYPE_INPUT:
if ((bf->undo + i)->buf == NULL) {
if (((bf->undo + i)->buf = mem_alloc(sizeof(TCHAR) * (bf->undo + i)->len)) == NULL) {
return FALSE;
}
CopyMemory((bf->undo + i)->buf, bf->buf + (bf->undo + i)->st, sizeof(TCHAR) * (bf->undo + i)->len);
}
string_delete(hWnd, bf, (bf->undo + i)->st, (bf->undo + i)->st + (bf->undo + i)->len);
break;
case UNDO_TYPE_DELETE:
string_insert(hWnd, bf, (bf->undo + i)->buf, (bf->undo + i)->len, TRUE);
break;
}
string_flush(bf, FALSE);
bf->undo_len--;
SendMessage(hWnd, EM_SETMODIFY, (bf->undo_len == bf->undo_pos) ? FALSE : TRUE, 0);
set_scrollbar(hWnd, bf);
ensure_visible(hWnd, bf);
InvalidateRect(hWnd, NULL, FALSE);
return TRUE;
}
/*
* redo_exec - REDOの実行
*/
static BOOL redo_exec(const HWND hWnd, BUFFER *bf)
{
int i;
string_flush(bf, TRUE);
i = bf->undo_len;
if ((bf->undo + i)->type == 0) {
return TRUE;
}
bf->sp = bf->cp = (bf->undo + i)->st;
switch ((bf->undo + i)->type) {
case UNDO_TYPE_INPUT:
string_insert(hWnd, bf, (bf->undo + i)->buf, (bf->undo + i)->len, TRUE);
break;
case UNDO_TYPE_DELETE:
string_delete(hWnd, bf, (bf->undo + i)->st, (bf->undo + i)->st + (bf->undo + i)->len);
break;
}
string_flush(bf, FALSE);
bf->undo_len++;
SendMessage(hWnd, EM_SETMODIFY, (bf->undo_len == bf->undo_pos) ? FALSE : TRUE, 0);
set_scrollbar(hWnd, bf);
ensure_visible(hWnd, bf);
InvalidateRect(hWnd, NULL, FALSE);
return TRUE;
}
/*
* string_init - 初期化
*/
static BOOL string_init(BUFFER *bf)
{
// free
mem_free(&bf->input_buf);
mem_free(&bf->line);
undo_free(bf, 0);
mem_free(&bf->undo);
// input init
bf->input_size = RESERVE_INPUT;
if ((bf->input_buf = mem_alloc(sizeof(TCHAR) * bf->input_size)) == NULL) {
return FALSE;
}
*bf->input_buf = TEXT('\0');
bf->input_len = 0;
bf->ip = NULL;
bf->ip_len = 0;
// line init
bf->line_size = RESERVE_LINE;
if ((bf->line = mem_calloc(sizeof(int) * bf->line_size)) == NULL) {
return FALSE;
}
bf->line_len = 0;
bf->line_width = 0;
// undo init
bf->undo_size = RESERVE_UNDO;
if ((bf->undo = mem_calloc(sizeof(UNDO) * bf->undo_size)) == NULL) {
return FALSE;
}
bf->undo_len = 0;
bf->pos_x = bf->max_x = 0;
bf->pos_y = bf->max_y = 0;