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Add swap file journaling for crash recovery.

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- Introduced `SwapManager` for buffering and writing incremental edits to sidecar `.kte.swp` files.
- Implemented basic operations: insertion, deletion, split, join, and checkpointing.
- Added recovery design doc (`docs/plans/swap-files.md`).
- Updated editor initialization to integrate `SwapManager` instance for crash recovery across buffers.
This commit is contained in:
Kyle Isom
2025-12-04 08:48:32 -08:00
parent 495183ebd2
commit 78b9345799
24 changed files with 1933 additions and 545 deletions
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48
GUIRenderer.cc
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@@ -369,8 +369,34 @@ GUIRenderer::Draw(Editor &ed)
// Draw syntax-colored runs (text above background highlights)
if (buf->SyntaxEnabled() && buf->Highlighter() && buf->Highlighter()->HasHighlighter()) {
const kte::LineHighlight &lh = buf->Highlighter()->GetLine(
kte::LineHighlight lh = buf->Highlighter()->GetLine(
*buf, static_cast<int>(i), buf->Version());
// Sanitize spans defensively: clamp to [0, line.size()], ensure end>=start, drop empties
struct SSpan {
std::size_t s;
std::size_t e;
kte::TokenKind k;
};
std::vector<SSpan> spans;
spans.reserve(lh.spans.size());
const std::size_t line_len = line.size();
for (const auto &sp: lh.spans) {
int s_raw = sp.col_start;
int e_raw = sp.col_end;
if (e_raw < s_raw)
std::swap(e_raw, s_raw);
std::size_t s = static_cast<std::size_t>(std::max(
0, std::min(s_raw, static_cast<int>(line_len))));
std::size_t e = static_cast<std::size_t>(std::max(
static_cast<int>(s), std::min(e_raw, static_cast<int>(line_len))));
if (e <= s)
continue;
spans.push_back(SSpan{s, e, sp.kind});
}
std::sort(spans.begin(), spans.end(), [](const SSpan &a, const SSpan &b) {
return a.s < b.s;
});
// Helper to convert a src column to expanded rx position
auto src_to_rx_full = [&](std::size_t sidx) -> std::size_t {
std::size_t rx = 0;
@@ -379,24 +405,22 @@ GUIRenderer::Draw(Editor &ed)
}
return rx;
};
for (const auto &sp: lh.spans) {
std::size_t rx_s = src_to_rx_full(
static_cast<std::size_t>(std::max(0, sp.col_start)));
std::size_t rx_e = src_to_rx_full(
static_cast<std::size_t>(std::max(sp.col_start, sp.col_end)));
for (const auto &sp: spans) {
std::size_t rx_s = src_to_rx_full(sp.s);
std::size_t rx_e = src_to_rx_full(sp.e);
if (rx_e <= coloffs_now)
continue;
// Clamp rx_s/rx_e to the visible portion
continue; // fully left of viewport
// Clamp to visible portion and expanded length
std::size_t draw_start = (rx_s > coloffs_now) ? rx_s : coloffs_now;
std::size_t draw_end = rx_e;
if (draw_start >= expanded.size())
continue;
draw_end = std::min<std::size_t>(draw_end, expanded.size());
continue; // fully right of expanded text
std::size_t draw_end = std::min<std::size_t>(rx_e, expanded.size());
if (draw_end <= draw_start)
continue;
// Screen position is relative to coloffs_now
std::size_t screen_x = draw_start - coloffs_now;
ImU32 col = ImGui::GetColorU32(kte::SyntaxInk(sp.kind));
ImU32 col = ImGui::GetColorU32(kte::SyntaxInk(sp.k));
ImVec2 p = ImVec2(line_pos.x + static_cast<float>(screen_x) * space_w,
line_pos.y);
ImGui::GetWindowDrawList()->AddText(