feat: add drag-down spreadsheet functions for numbers, fix click mapping issue

programs/src/spreadsheet/edit.cpp

@@ -225,9 +225,28 @@ void fill_down(int src_r0, int src_c0, int src_r1, int src_c1, int dst_r1) {
 
     int src_rows = src_r1 - src_r0 + 1;
 
+    // Detect integer-sequence fill: all source cells must be plain integers
+    bool is_int_seq = true;
+    int step[MAX_COLS];
+    for (int c = src_c0; is_int_seq && c <= src_c1; c++) {
+        if (src_rows == 1) {
+            if (!str_is_int(g_cells[src_r0][c].input)) is_int_seq = false;
+            step[c] = 1;
+        } else {
+            if (!str_is_int(g_cells[src_r0][c].input) ||
+                !str_is_int(g_cells[src_r1][c].input)) {
+                is_int_seq = false;
+            } else {
+                step[c] = str_to_int(g_cells[src_r1][c].input) -
+                          str_to_int(g_cells[src_r0][c].input);
+            }
+        }
+    }
+
     for (int r = src_r1 + 1; r <= dst_r1; r++) {
         int src_r = src_r0 + ((r - src_r0) % src_rows);
         int drow = r - src_r;
+        int fill_num = r - src_r1; // 1, 2, 3, ... past last source row
         for (int c = src_c0; c <= src_c1; c++) {
             Cell* src = &g_cells[src_r][c];
             Cell* dst = &g_cells[r][c];
@@ -238,6 +257,11 @@ void fill_down(int src_r0, int src_c0, int src_r1, int src_c1, int dst_r1) {
             if (src->input[0] == '=') {
                 // Formula: adjust cell references
                 adjust_formula_refs(src->input, dst->input, CELL_TEXT_MAX, 0, drow);
+            } else if (is_int_seq) {
+                // Integer sequence: continue the arithmetic series
+                int last_val = str_to_int(g_cells[src_r1][c].input);
+                int val = last_val + fill_num * step[c];
+                int_to_str(dst->input, CELL_TEXT_MAX, val);
             } else {
                 str_cpy(dst->input, src->input, CELL_TEXT_MAX);
             }

programs/src/spreadsheet/helpers.cpp

@@ -100,6 +100,46 @@ bool is_digit(char c) { return c >= '0' && c <= '9'; }
 bool is_alpha(char c) { return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'); }
 char to_upper(char c) { return (c >= 'a' && c <= 'z') ? c - 32 : c; }
 
+bool str_is_int(const char* s) {
+    if (!s || !s[0]) return false;
+    int i = 0;
+    if (s[i] == '-' || s[i] == '+') i++;
+    if (!is_digit(s[i])) return false;
+    while (is_digit(s[i])) i++;
+    return s[i] == '\0';
+}
+
+int str_to_int(const char* s) {
+    if (!s || !s[0]) return 0;
+    int i = 0;
+    bool neg = false;
+    if (s[i] == '-') { neg = true; i++; }
+    else if (s[i] == '+') i++;
+    int result = 0;
+    while (is_digit(s[i])) {
+        result = result * 10 + (s[i] - '0');
+        i++;
+    }
+    return neg ? -result : result;
+}
+
+void int_to_str(char* dst, int max, int v) {
+    if (max <= 0) return;
+    if (v == 0) { dst[0] = '0'; dst[1] = '\0'; return; }
+    int i = 0;
+    bool neg = false;
+    if (v < 0) { neg = true; v = -v; }
+    char buf[16];
+    int j = 0;
+    while (v > 0 && j < 16) {
+        buf[j++] = '0' + (v % 10);
+        v /= 10;
+    }
+    if (neg && j < 15) buf[j++] = '-';
+    for (int k = j - 1; k >= 0 && i < max - 1; k--) dst[i++] = buf[k];
+    dst[i] = '\0';
+}
+
 double str_to_double(const char* s, bool* ok) {
     *ok = false;
     if (!s || !s[0]) return 0;

programs/src/spreadsheet/main.cpp

@@ -196,38 +196,87 @@ static void save_file_dialog() {
     }
 }
 
+// ============================================================================
+// Toolbar button geometry (mirrors render.cpp layout exactly)
+// ============================================================================
+
+// Button widths matching render.cpp: icons=24, Bold/Align=24, Fmt=64, Undo/Redo=36
+static constexpr int TB_ICON_W = 24;
+static constexpr int TB_FMT_W   = 64;
+static constexpr int TB_UNDOREDO_W = 36;
+
+int tb_btn_x0(ToolBtnId id) {
+    // Mirrors render.cpp toolbar button layout exactly
+    int bx = 4; // start
+
+    // Open, Save (icon buttons: 24px wide, 4px gap)
+    if (id == TB_OPEN) return bx; bx += 24 + 4;
+    if (id == TB_SAVE) return bx; bx += 24 + 4;
+    bx += 8; // separator after Save
+
+    // Cut, Copy, Paste (icon buttons)
+    if (id == TB_CUT)   return bx; bx += 24 + 4;
+    if (id == TB_COPY)  return bx; bx += 24 + 4;
+    if (id == TB_PASTE) return bx; bx += 24 + 4;
+    bx += 8; // separator after Paste
+
+    // Bold (24px)
+    if (id == TB_BOLD) return bx; bx += 24 + 4;
+    bx += 8; // separator after Bold
+
+    // AL, AC, AR (24px each)
+    if (id == TB_AL) return bx; bx += 24 + 4;
+    if (id == TB_AC) return bx; bx += 24 + 4;
+    if (id == TB_AR) return bx; bx += 24 + 4;
+    bx += 8; // separator after AR
+
+    // FMT (64px)
+    if (id == TB_FMT) return bx; bx += 64 + 4;
+    bx += 8; // separator after FMT
+
+    // Undo, Redo (36px each)
+    if (id == TB_UNDO) return bx; bx += 36 + 4;
+    if (id == TB_REDO) return bx; bx += 36 + 4;
+
+    return 0;
+}
+
+int tb_btn_x1(ToolBtnId id) {
+    return tb_btn_x0(static_cast<ToolBtnId>(id + 1));
+}
+
 bool handle_toolbar_click(int mx, int my) {
     if (my >= TOOLBAR_H || my < TB_BTN_Y || my >= TB_BTN_Y + TB_BTN_SIZE) return false;
 
-    if (g_fmt_dropdown_open && !(mx >= TB_FMT_X0 && mx < TB_FMT_X1)) {
+    if (g_fmt_dropdown_open && !(mx >= tb_btn_x0(TB_FMT) && mx < tb_btn_x1(TB_FMT))) {
         g_fmt_dropdown_open = false;
     }
 
-    if (mx >= TB_OPEN_X0 && mx < TB_OPEN_X1) {
+    if (mx >= tb_btn_x0(TB_OPEN) && mx < tb_btn_x1(TB_OPEN)) {
         if (g_editing) commit_edit();
         open_file_dialog();
-    } else if (mx >= TB_SAVE_X0 && mx < TB_SAVE_X1) {
+    } else if (mx >= tb_btn_x0(TB_SAVE) && mx < tb_btn_x1(TB_SAVE)) {
         if (g_editing) commit_edit();
         save_file_dialog();
-    } else if (mx >= TB_CUT_X0 && mx < TB_CUT_X1) {
+    } else if (mx >= tb_btn_x0(TB_CUT) && mx < tb_btn_x1(TB_CUT)) {
         if (!g_editing) cut_selection();
-    } else if (mx >= TB_COPY_X0 && mx < TB_COPY_X1) {
+    } else if (mx >= tb_btn_x0(TB_COPY) && mx < tb_btn_x1(TB_COPY)) {
         if (!g_editing) copy_selection();
-    } else if (mx >= TB_PASTE_X0 && mx < TB_PASTE_X1) {
+    } else if (mx >= tb_btn_x0(TB_PASTE) && mx < tb_btn_x1(TB_PASTE)) {
         if (!g_editing) paste_at_cursor();
-    } else if (mx >= TB_BOLD_X0 && mx < TB_BOLD_X1) {
+    } else if (mx >= tb_btn_x0(TB_BOLD) && mx < tb_btn_x1(TB_BOLD)) {
         if (!g_editing) apply_bold_toggle();
-    } else if (mx >= TB_AL_X0 && mx < TB_AL_X1) {
+    } else if (mx >= tb_btn_x0(TB_AL) && mx < tb_btn_x1(TB_AL)) {
         if (!g_editing) apply_align(ALIGN_LEFT);
-    } else if (mx >= TB_AC_X0 && mx < TB_AC_X1) {
+    } else if (mx >= tb_btn_x0(TB_AC) && mx < tb_btn_x1(TB_AC)) {
         if (!g_editing) apply_align(ALIGN_CENTER);
-    } else if (mx >= TB_AR_X0 && mx < TB_AR_X1) {
+    } else if (mx >= tb_btn_x0(TB_AR) && mx < tb_btn_x1(TB_AR)) {
         if (!g_editing) apply_align(ALIGN_RIGHT);
-    } else if (mx >= TB_FMT_X0 && mx < TB_FMT_X1) {
+    } else if (mx >= tb_btn_x0(TB_FMT) && mx < tb_btn_x1(TB_FMT)) {
         g_fmt_dropdown_open = !g_fmt_dropdown_open;
-    } else if (mx >= TB_UNDO_X0 && mx < TB_UNDO_X1) {
+    } else if (mx >= tb_btn_x0(TB_UNDO) && mx < tb_btn_x1(TB_UNDO)) {
         undo_do();
-    } else if (mx >= TB_REDO_X0 && mx < TB_REDO_X1) {
+    } else if (mx >= tb_btn_x0(TB_REDO) && mx < tb_btn_x1(TB_REDO)) {
         redo_do();
     } else {
         return false;
@@ -237,7 +286,7 @@ bool handle_toolbar_click(int mx, int my) {
 
 bool handle_fmt_dropdown_click(int mx, int my) {
     if (!g_fmt_dropdown_open) return false;
-    int dx = TB_FMT_X0;
+    int dx = tb_btn_x0(TB_FMT);
     int dy = TOOLBAR_H;
     int dw = 80;
     int item_h = 26;

programs/src/spreadsheet/render.cpp

@@ -379,7 +379,7 @@ void render(uint32_t* pixels) {
 
     // ---- Format dropdown overlay ----
     if (g_fmt_dropdown_open && g_font) {
-        int dx = TB_FMT_X0;
+        int dx = tb_btn_x0(TB_FMT);
         int dy = TOOLBAR_H;
         int dw = 80;
         const char* items[] = { "Auto", "Decimal", "Currency $", "Percent %" };

programs/src/spreadsheet/spreadsheet.h

@@ -118,21 +118,26 @@ struct UndoEntry {
 static constexpr int PATHBAR_H = 32;
 
 // ============================================================================
-// Toolbar button positions
+// Toolbar button IDs (must match handle_toolbar_click and render order)
 // ============================================================================
 
-static constexpr int TB_OPEN_X0 = 4, TB_OPEN_X1 = 40;
+enum ToolBtnId {
-static constexpr int TB_SAVE_X0 = 44, TB_SAVE_X1 = 80;
+    TB_OPEN,
-static constexpr int TB_CUT_X0 = 92, TB_CUT_X1 = 120;
+    TB_SAVE,
-static constexpr int TB_COPY_X0 = 124, TB_COPY_X1 = 160;
+    TB_CUT,
-static constexpr int TB_PASTE_X0 = 164, TB_PASTE_X1 = 200;
+    TB_COPY,
-static constexpr int TB_BOLD_X0 = 212, TB_BOLD_X1 = 236;
+    TB_PASTE,
-static constexpr int TB_AL_X0 = 248, TB_AL_X1 = 272;
+    TB_BOLD,
-static constexpr int TB_AC_X0 = 276, TB_AC_X1 = 300;
+    TB_AL,
-static constexpr int TB_AR_X0 = 304, TB_AR_X1 = 328;
+    TB_AC,
-static constexpr int TB_FMT_X0 = 340, TB_FMT_X1 = 404;
+    TB_AR,
-static constexpr int TB_UNDO_X0 = 416, TB_UNDO_X1 = 452;
+    TB_FMT,
-static constexpr int TB_REDO_X0 = 456, TB_REDO_X1 = 492;
+    TB_UNDO,
+    TB_REDO,
+    TB_COUNT
+};
+int tb_btn_x0(ToolBtnId id);
+int tb_btn_x1(ToolBtnId id);
 
 // ============================================================================
 // Global state (extern — defined in main.cpp)
@@ -215,6 +220,9 @@ bool is_alpha(char c);
 char to_upper(char c);
 double str_to_double(const char* s, bool* ok);
 void double_to_str(char* buf, int max, double v);
+bool str_is_int(const char* s);
+int  str_to_int(const char* s);
+void int_to_str(char* dst, int max, int v);
 
 // ============================================================================
 // Function declarations — formula.cpp