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emacs-style movememnts and page up / down.

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This commit is contained in:
Kyle Isom
2025-11-29 20:56:21 -08:00
parent f7c6e3db9f
commit f9606626b4
10 changed files with 324 additions and 164 deletions
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24
TerminalRenderer.cc
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@@ -32,7 +32,8 @@ TerminalRenderer::Draw(Editor &ed)
const Buffer *buf = ed.CurrentBuffer();
int content_rows = rows - 1; // last line is status
if (buf) {
int saved_cur_y = -1, saved_cur_x = -1; // logical cursor position within content area
if (buf) {
const auto &lines = buf->Rows();
std::size_t rowoffs = buf->Rowoffs();
std::size_t coloffs = buf->Coloffs();
@@ -138,12 +139,15 @@ TerminalRenderer::Draw(Editor &ed)
std::size_t rx = buf->Rx(); // render x computed by command layer
int cur_y = static_cast<int>(cy) - static_cast<int>(buf->Rowoffs());
int cur_x = static_cast<int>(rx) - static_cast<int>(buf->Coloffs());
if (cur_y >= 0 && cur_y < content_rows && cur_x >= 0 && cur_x < cols) {
move(cur_y, cur_x);
}
} else {
mvaddstr(0, 0, "[no buffer]");
}
if (cur_y >= 0 && cur_y < content_rows && cur_x >= 0 && cur_x < cols) {
// remember where to leave the terminal cursor after status is drawn
saved_cur_y = cur_y;
saved_cur_x = cur_x;
move(cur_y, cur_x);
}
} else {
mvaddstr(0, 0, "[no buffer]");
}
// Status line (inverse) — left: app/version/buffer/dirty, middle: message, right: cursor/mark
move(rows - 1, 0);
@@ -237,5 +241,11 @@ TerminalRenderer::Draw(Editor &ed)
attroff(A_REVERSE);
// Restore terminal cursor to the content position so a visible caret
// remains in the editing area (not on the status line).
if (saved_cur_y >= 0 && saved_cur_x >= 0) {
move(saved_cur_y, saved_cur_x);
}
refresh();
}