118 lines
3.6 KiB
C++
118 lines
3.6 KiB
C++
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/* notes.cpp — Deshab 记事本（GUI PE64 工具）
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*
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* 单缓冲文本编辑：WM_CHAR 键入、Backspace 删、Enter 换行、
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* 自动折行 + 尾部自动滚动；底部状态栏显示字符数。
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* 无文件 IO（shim CreateFileA → PE-E05），纯内存便签。
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* Esc 关闭。
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*/
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#include "pe_tool.h"
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#define NOTE_CAP 4096
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#define LINE_H 20
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#define MARGIN 10
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static char g_buf[NOTE_CAP + 1];
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static int g_len;
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static int g_view_line; /* 顶部可见行 */
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/* 折行游标走查：返回总行数，*end_line/*end_col 为缓冲末尾（光标）位置 */
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static int layout_walk(int cols, int *end_line, int *end_col) {
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int line = 0, col = 0;
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for (int i = 0; i < g_len; i++) {
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if (g_buf[i] == '\n') { line++; col = 0; continue; }
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col++;
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if (col >= cols) { line++; col = 0; }
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}
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*end_line = line;
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*end_col = col;
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return line + 1;
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}
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/* shim 键盘合成契约：可打印字符（>=0x20）走 WM_CHAR；Backspace/Enter/Esc
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* 等控制键只走 WM_KEYDOWN（vk），WM_CHAR 不合成。 */
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static void key(unsigned vk, unsigned ch) {
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if (ch) {
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if (ch >= 32 && ch < 127 && g_len < NOTE_CAP)
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g_buf[g_len++] = (char)ch;
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return;
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}
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if (vk == 8) { /* Backspace */
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if (g_len > 0) g_len--;
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return;
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}
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if (vk == 13) { /* Enter */
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if (g_len < NOTE_CAP) g_buf[g_len++] = '\n';
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return;
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}
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}
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static void frame(PT_Canvas *cv) {
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pt_fill(cv, 0, 0, cv->w, cv->h, PT_BG);
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int cols = (cv->w - MARGIN * 2) / PT_STEP;
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if (cols < 8) cols = 8;
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int view_h = cv->h - LINE_H; /* 底部状态栏高度 LINE_H */
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int rows = view_h / LINE_H;
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if (rows < 1) rows = 1;
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int cur_line, cur_col;
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int total = layout_walk(cols, &cur_line, &cur_col);
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(void)total;
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/* 自动滚动：光标保持可见 */
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if (cur_line >= g_view_line + rows) g_view_line = cur_line - rows + 1;
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if (cur_line < g_view_line) g_view_line = cur_line;
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if (g_view_line < 0) g_view_line = 0;
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/* 文本区卡片 */
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pt_round_fill(cv, MARGIN / 2, MARGIN / 2, cv->w - MARGIN, view_h - MARGIN,
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PT_CARD, 8);
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/* 折行绘制（只画可见行窗口） */
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{
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int line = 0, col = 0;
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for (int i = 0; i < g_len; i++) {
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char c = g_buf[i];
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if (c == '\n') { line++; col = 0; continue; }
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if (line >= g_view_line && line < g_view_line + rows)
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pt_char(cv, c, MARGIN + col * PT_STEP,
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MARGIN + (line - g_view_line) * LINE_H, PT_TEXT);
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col++;
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if (col >= cols) { line++; col = 0; }
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if (line >= g_view_line + rows && line > cur_line) break;
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}
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}
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/* 光标（RTC 秒闪烁） */
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{
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PT_Time t = pt_rtc_now();
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if ((t.sec & 1) == 0 && cur_line >= g_view_line &&
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cur_line < g_view_line + rows) {
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pt_fill(cv, MARGIN + cur_col * PT_STEP,
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MARGIN + (cur_line - g_view_line) * LINE_H,
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2, LINE_H - 4, PT_ACCENT);
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}
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}
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/* 状态栏 */
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char b[24];
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int n = pt_dec((u32)g_len, b);
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b[n++] = '/';
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n += pt_dec(NOTE_CAP, b + n);
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b[n] = 0;
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pt_fill(cv, 0, cv->h - LINE_H, cv->w, LINE_H, PT_BG);
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pt_text(cv, b, MARGIN, cv->h - LINE_H + 2, PT_TEXT_DIM);
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pt_text(cv, "Esc = close", cv->w - MARGIN - 11 * PT_STEP,
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cv->h - LINE_H + 2, PT_TEXT_DIM);
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}
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int main(void) {
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PT_Desc d;
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d.w = 560; d.h = 480;
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d.title = L"Notes";
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d.frame = frame;
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d.key = key;
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d.mouse = 0;
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return pt_run(&d);
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}
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