Implemented GOTO line. (#32)

avalonbits · Dec 14, 2023 · e918a88 · e918a88
1 parent 99ec534
commit e918a88
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Showing 6 changed files with 127 additions and 3 deletions.
diff --git a/bin/aed.bin b/bin/aed.bin
diff --git a/src/cmd_ops.c b/src/cmd_ops.c
@@ -594,3 +594,58 @@ void cmd_page_down(editor* ed) {
     refresh_screen(scr, tb);
     scr_show_cursor_ch(scr, ch);
 }
+
+void cmd_goto(editor* ed) {
+    SCR(ed);
+    UI(ed);
+    TB(ed);
+
+    int line = 0;
+    RESPONSE goto_line = ui_goto(ui, scr, &line);
+    if (goto_line != YES_OPT) {
+        return;
+    }
+
+    const int ypos = tb_ypos(tb);
+    if (ypos == line) {
+        return;
+    }
+
+    int diff = 0;
+    scr_hide_cursor_ch(scr, tb_peek(tb));
+    if (line < ypos) {
+        for (; line < ypos; line++) {
+            diff--;
+            tb_up(tb);
+            if (tb_ypos(tb) == 1) {
+                break;
+            }
+        }
+    } else {
+        int curr = tb_ypos(tb);
+        for (; ypos < line; line--) {
+            tb_down(tb);
+            const int nyp = tb_ypos(tb);
+            if (nyp == curr) {
+                break;
+            }
+            curr = nyp;
+            diff++;
+        }
+    }
+
+    diff = ((int)scr->currY_) + diff;
+    if (diff < (int)scr->topY_) {
+        scr->currY_ = scr->topY_;
+    } else if (diff >= (int) scr->bottomY_) {
+        scr->currY_ = scr->bottomY_-1;
+    } else {
+        scr->currY_ = diff;
+    }
+    vdp_cursor_tab(scr->currY_, scr->currX_);
+
+    scr->currX_ = tb_xpos(tb) < scr->cols_ ? tb_xpos(tb)-1 : scr->cols_-1;
+    refresh_screen(scr, tb);
+    scr_show_cursor_ch(scr, tb_peek(tb));
+}
+
diff --git a/src/cmd_ops.h b/src/cmd_ops.h
@@ -54,5 +54,6 @@ void cmd_home(editor* ed);
 void cmd_end(editor* ed);
 void cmd_page_up(editor* ed);
 void cmd_page_down(editor* ed);
+void cmd_goto(editor* ed);
 
 #endif  // _CMD_OPS_H_
diff --git a/src/editor.c b/src/editor.c
@@ -116,8 +116,12 @@ key_command ctrlCmds(key_command kc, uint8_t mods) {
                 kc.cmd = cmd_color_picker;
             }
             break;
+        case VK_G:
+        case VK_g:
+            kc.cmd = cmd_goto;
+            break;
         default:
-            kc.cmd = NULL;;
+            kc.cmd = NULL;
             break;
     }
     return kc;

diff --git a/src/user_input.c b/src/user_input.c
@@ -18,10 +18,10 @@
 
 #include "user_input.h"
 
+#include <agon/vdp_vdu.h>
+#include <mos_api.h>
 #include <string.h>
 
-#include "agon/vdp_vdu.h"
-#include "mos_api.h"
 #include "vkey.h"
 
 user_input* ui_init(user_input* ui, int size, char ypos, char cols) {
@@ -37,6 +37,69 @@ void ui_destroy(user_input* ui) {
     cb_destroy(&ui->cb_);
 }
 
+
+static const char goto_line[11] = "Goto line: ";
+static int atoi(uint8_t* str, uint8_t sz) {
+    int v = 0;
+    int mul = 1;
+    for (uint8_t i = 1; i <= sz; i++) {
+        v += (str[sz-i] - '0') * mul;
+        mul *= 10;
+    }
+    return v;
+}
+
+RESPONSE ui_goto(user_input* ui, screen* scr, int* line) {
+    scr_write_line(scr, ui->ypos_, goto_line, sizeof(goto_line));
+    vdp_cursor_tab(ui->ypos_, sizeof(goto_line));
+    scr_show_cursor_ch(scr, scr->cursor_);
+
+    char_buffer* cb = &ui->cb_;
+    cb_clear(cb);
+
+    do {
+        uint8_t key = getch();
+        VKey vkey = getsysvar_vkeycode();
+
+        if (key >= '0' && key <= '9') {
+            cb_put(cb, key);
+            putch(key);
+            scr_show_cursor_ch(scr, cb_peek(cb));
+            continue;
+        }
+
+        switch (vkey) {
+            case VK_ESCAPE:
+                return CANCEL_OPT;
+            case VK_RETURN: {
+                int sz = 0;
+                uint8_t* buf = cb_prefix(cb, &sz);
+                if (sz <= 0) {
+                    return CANCEL_OPT;
+                }
+                *line = atoi(buf, (uint8_t) sz);
+                if (*line < 0) {
+                    return CANCEL_OPT;
+                }
+                return YES_OPT;
+            }
+            case VK_BACKSPACE:
+                scr_hide_cursor_ch(scr, cb_peek(cb));
+                if (cb_bksp(cb)) {
+                    vdp_cursor_left();
+                }
+                scr_show_cursor_ch(scr, cb_peek(cb));
+                break;
+            default:
+                break;
+
+        }
+    } while (true);
+
+    return CANCEL_OPT;
+}
+
+
 static const char col_select[39] = "Use UP/DOWN LEFT/RIGHT to select FG/BG";
 
 RESPONSE ui_color_picker(user_input* ui, screen* scr) {

diff --git a/src/user_input.h b/src/user_input.h
@@ -38,6 +38,7 @@ typedef struct _user_input {
 user_input* ui_init(user_input* ui, int size, char ypos, char cols);
 void ui_destroy(user_input* ui);
 
+RESPONSE ui_goto(user_input* ui, screen* scr, int* line);
 RESPONSE ui_color_picker(user_input* ui, screen* scr);
 RESPONSE ui_dialog(user_input* ui, screen* scr, const char* msg);
 RESPONSE ui_text(