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kte/QtFrontend.cc
T
Claude 3be85ef4ad Review fixes: exception-safe AdoptOriginal; Qt draws cells straddling the left edge 
AdoptOriginal cleared the table before allocating its piece list, so a
bad_alloc left a live buffer with the file's size and no pieces;
OpenFromFile no longer caught it either. The piece list is now built
before anything is touched (the rest cannot throw) and OpenFromFile
again reports "File too large to load" with the buffer unchanged.

Qt skipped every character starting left of the horizontal scroll
offset, so a tab or wide character straddling it left blank columns
while selection and cursor still used the real ones. Such a character
is now drawn at its own column and clipped by the viewport.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015rcVQiiWyTzoNrsvLSaAfB
2026-09-24 12:19:59 -07:00

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#include "QtFrontend.h"
#include "SearchHighlight.h"
#include "TermWidth.h"
#include <QApplication>
#include <QWidget>
#include <QKeyEvent>
#include <QTimer>
#include <QScreen>
#include <QFont>
#include <QFontMetrics>
#include <QFontMetricsF>
#include <QFontDatabase>
#include <QFileDialog>
#include <QFontDialog>
#include <QPainter>
#include <QPaintEvent>
#include <QWheelEvent>
#include "Editor.h"
#include "Command.h"
#include "Buffer.h"
#include "GUITheme.h"
#include "Highlight.h"
namespace {
// Text layout, shared by painting and the editor's row/column count: they
// must agree, or the editor scrolls the cursor to a column the window does
// not show.
struct TextLayout {
int line_h;
qreal cell_w; // fractional: rounding it drifts over long lines
int ch_w; // cell_w rounded, for pixel-delta arithmetic
int status_h;
static constexpr int pad_l = 8, pad_t = 6, pad_r = 8, pad_b = 6;
explicit TextLayout(const QFont &f)
: line_h(std::max(1, QFontMetrics(f).height())),
cell_w(std::max<qreal>(1.0, QFontMetricsF(f).horizontalAdvance(QStringLiteral(" ")))),
ch_w(std::max(1, qRound(cell_w))),
status_h(line_h + 6) {}
// Rows (text rows plus the status row, see Editor::ContentRows) and
// columns for a w x h window.
void SetEditorDimensions(Editor &ed, int w, int h) const
{
const int avail_w = std::max(0, w - pad_l - pad_r);
const int avail_h = std::max(0, h - pad_t - pad_b - status_h);
ed.SetDimensions(std::max<std::size_t>(1, avail_h / line_h) + 1,
std::max<std::size_t>(1, static_cast<std::size_t>(avail_w / cell_w)));
}
};
class MainWindow : public QWidget {
public:
explicit MainWindow(class QtInputHandler &ih, QWidget *parent = nullptr)
: QWidget(parent), input_(ih)
{
// Match ImGui window title format
setWindowTitle(QStringLiteral("kge - kyle's graphical editor ")
+ QStringLiteral(KTE_VERSION_STR));
resize(1280, 800);
setFocusPolicy(Qt::StrongFocus);
}
bool WasClosed() const
{
return closed_;
}
void SetEditor(Editor *ed)
{
ed_ = ed;
}
void SetFontFamilyAndSize(QString family, int px)
{
if (family.isEmpty())
family = QStringLiteral("Brass Mono");
if (px <= 0)
px = 18;
font_family_ = std::move(family);
font_px_ = px;
update();
}
protected:
void keyPressEvent(QKeyEvent *event) override
{
// Route to editor keymap; if handled, accept and stop propagation so
// Qt doesn't trigger any default widget shortcuts.
if (input_.ProcessKeyEvent(*event)) {
event->accept();
return;
}
QWidget::keyPressEvent(event);
}
void paintEvent(QPaintEvent *event) override
{
Q_UNUSED(event);
QPainter p(this);
p.setRenderHint(QPainter::TextAntialiasing, true);
// Colors from GUITheme palette (Qt branch)
auto to_qcolor = [](const KteColor &c) -> QColor {
int r = int(std::round(c.x * 255.0f));
int g = int(std::round(c.y * 255.0f));
int b = int(std::round(c.z * 255.0f));
int a = int(std::round(c.w * 255.0f));
return QColor(r, g, b, a);
};
const auto pal = kte::GetPalette();
const QColor bg = to_qcolor(pal.bg);
const QColor fg = to_qcolor(pal.fg);
const QColor sel_bg = to_qcolor(pal.sel_bg);
const QColor cur_bg = to_qcolor(pal.cur_bg);
const QColor status_bg = to_qcolor(pal.status_bg);
const QColor status_fg = to_qcolor(pal.status_fg);
// Background
p.fillRect(rect(), bg);
// Font/metrics (configured or defaults)
QFont f(font_family_, font_px_);
p.setFont(f);
QFontMetrics fm(f);
const TextLayout layout(f);
const int line_h = layout.line_h;
const qreal cell_w = layout.cell_w;
const int pad_l = TextLayout::pad_l;
const int pad_t = TextLayout::pad_t;
const int pad_r = TextLayout::pad_r;
const int pad_b = TextLayout::pad_b;
const int status_h = layout.status_h;
// Content area (text viewport)
const QRect content_rect(pad_l,
pad_t,
width() - pad_l - pad_r,
height() - pad_t - pad_b - status_h);
// Text viewport occupies all content area (no extra title row)
QRect viewport(content_rect.x(), content_rect.y(), content_rect.width(), content_rect.height());
// Draw buffer contents
if (ed_ && viewport.height() > 0 && viewport.width() > 0) {
const Buffer *buf = ed_->CurrentBuffer();
if (buf) {
const std::size_t nrows = buf->Nrows();
const std::size_t rowoffs = buf->Rowoffs();
const std::size_t coloffs = buf->Coloffs();
const std::size_t cy = buf->Cury();
const std::size_t cx = buf->Curx();
// Visible line count
const int max_lines = (line_h > 0) ? (viewport.height() / line_h) : 0;
const std::size_t last_row = std::min<std::size_t>(
nrows, rowoffs + std::max(0, max_lines));
// Prepare painter clip to viewport
p.save();
p.setClipRect(viewport);
// Search matches: the pattern is compiled once per frame.
const kte::SearchHighlight search_hl(*ed_);
std::vector<std::pair<std::size_t, std::size_t> > hl_src_ranges;
std::vector<std::size_t> col_of; // per line, see DisplayColumns
// Left edge of display column col (fractional pixels).
auto col_x = [&](std::size_t col) -> qreal {
return viewport.x() + (static_cast<qreal>(col) - static_cast<qreal>(coloffs)) * cell_w;
};
// Columns the viewport shows, plus one partly visible.
const std::size_t vis_cols = static_cast<std::size_t>(viewport.width() / cell_w) + 1;
// Iterate visible lines
for (std::size_t i = rowoffs, vis_idx = 0; i < last_row; ++i, ++vis_idx) {
// Get line as string for regex/iterator usage and general string ops.
const std::string line = buf->GetLineString(i);
const int y = viewport.y() + static_cast<int>(vis_idx) * line_h;
const int baseline = y + fm.ascent();
// Display column (cells, as the command layer's scrolling
// counts them) of each source byte.
kte::DisplayColumns(line, col_of);
auto src_to_rx_line = [&](std::size_t src_col) -> std::size_t {
return col_of[std::min(src_col, line.size())];
};
// Draw source bytes [s, e) (tabs expanded) at their column;
// the viewport clip hides what lies left of coloffs. ASCII runs
// are drawn whole; other characters one at a time at their
// cell, since a glyph from a fallback font can be wider than a
// cell and would push the rest of the run out of place.
auto draw_text_at = [&](std::size_t col, const char *d, std::size_t n) {
p.drawText(QPointF(col_x(col), baseline), QString::fromUtf8(d, static_cast<int>(n)));
};
auto draw_seg = [&](std::size_t s, std::size_t e, const QColor &color) {
// Only the visible columns: characters that end at or
// before coloffs, or start right of the viewport, are
// skipped. A tab or wide character straddling coloffs
// starts left of it; it is drawn at its own column and
// the clip cuts its left part.
const std::size_t first = s;
s = static_cast<std::size_t>(std::lower_bound(col_of.begin() + s, col_of.begin() + e,
coloffs) - col_of.begin());
if (s > first && col_of[s] > coloffs) {
// The character before s ends past coloffs: back up to
// its first byte.
--s;
while (s > first && (static_cast<unsigned char>(line[s]) & 0xC0) == 0x80)
--s;
}
e = static_cast<std::size_t>(std::lower_bound(col_of.begin() + s, col_of.begin() + e,
coloffs + vis_cols) - col_of.begin());
if (e <= s)
return;
p.setPen(color);
std::string run; // ASCII, tabs expanded
std::size_t run_col = col_of[s];
for (std::size_t k = s; k < e;) {
const unsigned char c = static_cast<unsigned char>(line[k]);
if (c < 0x80) {
if (run.empty())
run_col = col_of[k];
if (c == '\t')
run.append(col_of[k + 1] - col_of[k], ' ');
else
run.push_back(static_cast<char>(c));
++k;
continue;
}
if (!run.empty()) {
draw_text_at(run_col, run.data(), run.size());
run.clear();
}
std::size_t n = 1; // bytes sharing this character's column
while (k + n < e && col_of[k + n] == col_of[k] &&
(static_cast<unsigned char>(line[k + n]) & 0xC0) == 0x80)
++n;
draw_text_at(col_of[k], line.data() + k, n);
k += n;
}
if (!run.empty())
draw_text_at(run_col, run.data(), run.size());
};
// Search-match background highlights first (under text)
if (search_hl.Active()) {
search_hl.Ranges(line, hl_src_ranges);
if (!hl_src_ranges.empty()) {
const bool has_current =
ed_->SearchMatchLen() > 0 && ed_->SearchMatchY() == i;
const std::size_t cur_x = has_current ? ed_->SearchMatchX() : 0;
const std::size_t cur_end = has_current
? (ed_->SearchMatchX() + ed_->SearchMatchLen())
: 0;
for (const auto &rg: hl_src_ranges) {
std::size_t sx = rg.first, ex = rg.second;
std::size_t rx_s = src_to_rx_line(sx);
std::size_t rx_e = src_to_rx_line(ex);
if (rx_e <= coloffs)
continue; // fully left of view
const int vx0 = qRound(col_x(std::max(rx_s, coloffs)));
const int vx1 = qRound(col_x(rx_e));
QRect r(vx0, y, std::max(0, vx1 - vx0), line_h);
if (r.width() <= 0)
continue;
bool is_current =
has_current && sx == cur_x && ex == cur_end;
QColor col = is_current
? QColor(255, 220, 120, 140)
: QColor(200, 200, 0, 90);
p.fillRect(r, col);
}
}
}
// Selection background (if active on this line)
if (buf->MarkSet() && (
i == buf->MarkCury() || i == cy || (
i > std::min(buf->MarkCury(), cy) && i < std::max(
buf->MarkCury(), cy)))) {
std::size_t sx = 0, ex = 0;
if (buf->MarkCury() == i && cy == i) {
sx = std::min(buf->MarkCurx(), cx);
ex = std::max(buf->MarkCurx(), cx);
} else if (i == buf->MarkCury()) {
sx = buf->MarkCurx();
ex = line.size();
} else if (i == cy) {
sx = 0;
ex = cx;
} else {
sx = 0;
ex = line.size();
}
std::size_t rx_s = src_to_rx_line(sx);
std::size_t rx_e = src_to_rx_line(ex);
if (rx_e > coloffs) {
const int vx0 = qRound(col_x(std::max(rx_s, coloffs)));
const int vx1 = qRound(col_x(rx_e));
QRect sel_r(vx0, y, std::max(0, vx1 - vx0), line_h);
if (sel_r.width() > 0)
p.fillRect(sel_r, sel_bg);
}
}
// Syntax-colored spans, the text between them in the default
// color (drawing only the spans dropped unhighlighted text such
// as operators).
if (buf->SyntaxEnabled() && buf->Highlighter() && buf->Highlighter()->
HasHighlighter()) {
const kte::LineHighlight &lh = buf->Highlighter()->GetLine(
*buf, static_cast<int>(i), buf->Version());
std::vector<kte::HighlightSpan> spans; // clamped, ordered, whole characters
kte::SanitizeSpans(line, lh.spans, spans);
auto colorFor = [](kte::TokenKind k) -> QColor {
// GUITheme provides colors via ImGui vector; avoid direct dependency types
const auto v = kte::SyntaxInk(k);
return QColor(int(v.x * 255.0f), int(v.y * 255.0f),
int(v.z * 255.0f), int(v.w * 255.0f));
};
std::size_t pos = 0;
for (const auto &sp: spans) {
const std::size_t s = std::max(static_cast<std::size_t>(sp.col_start), pos);
draw_seg(pos, s, fg);
draw_seg(s, static_cast<std::size_t>(sp.col_end), colorFor(sp.kind));
pos = std::max(pos, static_cast<std::size_t>(sp.col_end));
}
draw_seg(pos, line.size(), fg);
} else {
draw_seg(0, line.size(), fg);
}
// Cursor indicator on current line
if (i == cy) {
const std::size_t rx_cur = src_to_rx_line(cx);
if (rx_cur >= coloffs) {
const int x0 = qRound(col_x(rx_cur));
p.fillRect(QRect(x0, y, qRound(col_x(rx_cur + 1)) - x0, line_h), cur_bg);
}
}
}
p.restore();
}
}
// Status bar
const int bar_y = height() - status_h;
QRect status_rect(0, bar_y, width(), status_h);
p.fillRect(status_rect, status_bg);
p.setPen(status_fg);
if (ed_) {
const int pad = 6;
const int left_x = status_rect.x() + pad;
const int right_x_max = status_rect.x() + status_rect.width() - pad;
const int baseline_y = bar_y + (status_h + fm.ascent() - fm.descent()) / 2;
// If a prompt is active, mirror ImGui/TUI: show only the prompt across the bar
if (ed_->PromptActive()) {
std::string label = ed_->PromptLabel();
std::string text = ed_->PromptText();
// Map $HOME to ~ for path prompts (Open/Save/Chdir)
auto kind = ed_->CurrentPromptKind();
if (kind == Editor::PromptKind::OpenFile ||
kind == Editor::PromptKind::SaveAs ||
kind == Editor::PromptKind::Chdir) {
const char *home_c = std::getenv("HOME");
if (home_c && *home_c) {
std::string home(home_c);
if (text.rfind(home, 0) == 0) {
std::string rest = text.substr(home.size());
if (rest.empty())
text = "~";
else if (!rest.empty() && (rest[0] == '/' || rest[0] == '\\'))
text = std::string("~") + rest;
}
}
}
std::string prefix;
if (kind == Editor::PromptKind::Command)
prefix = ": ";
else if (!label.empty())
prefix = label + ": ";
// Compose text and elide per behavior:
const int max_w = status_rect.width() - 2 * pad;
QString qprefix = QString::fromStdString(prefix);
QString qtext = QString::fromStdString(text);
int avail_w = std::max(0, max_w - fm.horizontalAdvance(qprefix));
Qt::TextElideMode mode = Qt::ElideRight;
if (kind == Editor::PromptKind::OpenFile ||
kind == Editor::PromptKind::SaveAs ||
kind == Editor::PromptKind::Chdir) {
mode = Qt::ElideLeft;
}
QString shown = fm.elidedText(qtext, mode, avail_w);
p.drawText(left_x, baseline_y, qprefix + shown);
} else {
// Build left segment: app/version, buffer idx/total, filename [+dirty], line count
QString left;
left += QStringLiteral("kge ");
left += QStringLiteral(KTE_VERSION_STR);
const Buffer *buf = ed_->CurrentBuffer();
if (buf) {
// buffer index/total
std::size_t total = ed_->BufferCount();
if (total > 0) {
std::size_t idx1 = ed_->CurrentBufferIndex() + 1; // 1-based
left += QStringLiteral(" [");
left += QString::number(static_cast<qlonglong>(idx1));
left += QStringLiteral("/");
left += QString::number(static_cast<qlonglong>(total));
left += QStringLiteral("] ");
} else {
left += QStringLiteral(" ");
}
// buffer display name
std::string disp;
try {
disp = ed_->DisplayNameFor(*buf);
} catch (...) {
disp = buf->Filename();
}
if (disp.empty())
disp = "[No Name]";
left += QString::fromStdString(disp);
if (buf->Dirty())
left += QStringLiteral(" *");
// total lines suffix " <n>L"
unsigned long lcount = static_cast<unsigned long>(buf->Nrows());
left += QStringLiteral(" ");
left += QString::number(static_cast<qlonglong>(lcount));
left += QStringLiteral("L");
}
// Build right segment: cursor and mark
QString right;
if (buf) {
int row1 = static_cast<int>(buf->Cury()) + 1;
int col1 = static_cast<int>(buf->Curx()) + 1;
bool have_mark = buf->MarkSet();
int mrow1 = have_mark ? static_cast<int>(buf->MarkCury()) + 1 : 0;
int mcol1 = have_mark ? static_cast<int>(buf->MarkCurx()) + 1 : 0;
if (have_mark)
right = QString("%1,%2 | M: %3,%4").arg(row1).arg(col1).arg(mrow1).arg(
mcol1);
else
right = QString("%1,%2 | M: not set").arg(row1).arg(col1);
}
// Middle message: status text
QString mid = QString::fromStdString(ed_->Status());
// Measure and layout
int left_w = fm.horizontalAdvance(left);
int right_w = fm.horizontalAdvance(right);
int lx = left_x;
int rx = std::max(left_x, right_x_max - right_w);
// If overlap, elide left to make space for right
if (lx + left_w + pad > rx) {
int max_left_w = std::max(0, rx - lx - pad);
left = fm.elidedText(left, Qt::ElideRight, max_left_w);
left_w = fm.horizontalAdvance(left);
}
// Draw left and right
p.drawText(lx, baseline_y, left);
if (!right.isEmpty())
p.drawText(rx, baseline_y, right);
// Middle message clipped between end of left and start of right
int mid_left = lx + left_w + pad;
int mid_right = std::max(mid_left, rx - pad);
int mid_w = std::max(0, mid_right - mid_left);
if (mid_w > 0 && !mid.isEmpty()) {
QString mid_show = fm.elidedText(mid, Qt::ElideRight, mid_w);
p.save();
p.setClipRect(QRect(mid_left, bar_y, mid_w, status_h));
p.drawText(mid_left, baseline_y, mid_show);
p.restore();
}
}
}
}
void resizeEvent(QResizeEvent *event) override
{
QWidget::resizeEvent(event);
if (!ed_)
return;
// Update editor dimensions based on new size
QFont f(font_family_, font_px_);
TextLayout(f).SetEditorDimensions(*ed_, width(), height());
}
void wheelEvent(QWheelEvent *event) override
{
if (!ed_) {
QWidget::wheelEvent(event);
return;
}
Buffer *buf = ed_->CurrentBuffer();
if (!buf) {
QWidget::wheelEvent(event);
return;
}
// Recompute metrics to map pixel deltas to rows/cols
const TextLayout layout(QFont(font_family_, font_px_));
const int line_h = layout.line_h;
const int ch_w = layout.ch_w;
// Determine scroll intent: use pixelDelta when available (trackpads), otherwise angleDelta
QPoint pixel = event->pixelDelta();
QPoint angle = event->angleDelta();
double v_lines_delta = 0.0;
double h_cols_delta = 0.0;
// Horizontal scroll with Shift or explicit horizontal delta
bool horiz_mode = (event->modifiers() & Qt::ShiftModifier) || (!pixel.isNull() && pixel.x() != 0) || (
!angle.isNull() && angle.x() != 0);
if (!pixel.isNull()) {
// Trackpad smooth scrolling (pixels)
v_lines_delta = -static_cast<double>(pixel.y()) / std::max(1, line_h);
h_cols_delta = -static_cast<double>(pixel.x()) / std::max(1, ch_w);
} else if (!angle.isNull()) {
// Mouse wheel: 120 units per notch; map one notch to 3 lines similar to ImGui UX
v_lines_delta = -static_cast<double>(angle.y()) / 120.0 * 3.0;
// For horizontal wheels, each notch scrolls 8 columns
h_cols_delta = -static_cast<double>(angle.x()) / 120.0 * 8.0;
}
// Accumulate fractional deltas across events
v_scroll_accum_ += v_lines_delta;
h_scroll_accum_ += h_cols_delta;
int d_rows = 0;
int d_cols = 0;
if (std::fabs(v_scroll_accum_) >= 1.0 && (!horiz_mode || std::fabs(v_scroll_accum_) > std::fabs(
h_scroll_accum_))) {
d_rows = static_cast<int>(v_scroll_accum_);
v_scroll_accum_ -= d_rows;
}
if (std::fabs(h_scroll_accum_) >= 1.0 && (horiz_mode || std::fabs(h_scroll_accum_) >= std::fabs(
v_scroll_accum_))) {
d_cols = static_cast<int>(h_scroll_accum_);
h_scroll_accum_ -= d_cols;
}
if (d_rows != 0 || d_cols != 0) {
std::size_t new_rowoffs = buf->Rowoffs();
std::size_t new_coloffs = buf->Coloffs();
// Clamp vertical between 0 and last row (leaving at least one visible line)
if (d_rows != 0) {
long nr = static_cast<long>(new_rowoffs) + d_rows;
if (nr < 0)
nr = 0;
const auto nrows = static_cast<long>(buf->Nrows());
if (nr > std::max(0L, nrows - 1))
nr = std::max(0L, nrows - 1);
new_rowoffs = static_cast<std::size_t>(nr);
}
if (d_cols != 0) {
long nc = static_cast<long>(new_coloffs) + d_cols;
if (nc < 0)
nc = 0;
new_coloffs = static_cast<std::size_t>(nc);
}
buf->SetOffsets(new_rowoffs, new_coloffs);
update();
event->accept();
return;
}
QWidget::wheelEvent(event);
}
void closeEvent(QCloseEvent *event) override
{
closed_ = true;
QWidget::closeEvent(event);
}
private:
QtInputHandler &input_;
bool closed_ = false;
Editor *ed_ = nullptr;
double v_scroll_accum_ = 0.0;
double h_scroll_accum_ = 0.0;
QString font_family_ = QStringLiteral("Brass Mono");
int font_px_ = 18;
};
} // namespace
bool
GUIFrontend::Init(int &argc, char **argv, Editor &ed)
{
app_ = new QApplication(argc, argv);
window_ = new MainWindow(input_);
window_->show();
// Ensure the window becomes the active, focused window so it receives key events
window_->activateWindow();
window_->raise();
window_->setFocus(Qt::OtherFocusReason);
renderer_.Attach(window_);
input_.Attach(&ed);
if (auto *mw = dynamic_cast<MainWindow *>(window_))
mw->SetEditor(&ed);
// Load GUI configuration (kge.ini) and configure font for Qt
config_ = GUIConfig::Load();
// Apply background mode from config to match ImGui frontend behavior
if (config_.background == "light")
kte::SetBackgroundMode(kte::BackgroundMode::Light);
else
kte::SetBackgroundMode(kte::BackgroundMode::Dark);
// Apply theme by name for Qt palette-based theming (maps to named palettes).
// If unknown, falls back to the generic light/dark palette.
(void) kte::ApplyQtThemeByName(config_.theme);
if (window_)
window_->update();
// Map GUIConfig font name to a system family (Qt uses installed fonts)
auto choose_family = [](const std::string &name) -> QString {
QString fam;
std::string n = name;
std::transform(n.begin(), n.end(), n.begin(), [](unsigned char c) {
return (char) std::tolower(c);
});
if (n.empty() || n == "default" || n == "brassmono" || n == "brassmonocode") {
fam = QStringLiteral("Brass Mono");
} else if (n == "jetbrains" || n == "jetbrains mono" || n == "jetbrains-mono") {
fam = QStringLiteral("JetBrains Mono");
} else if (n == "iosevka") {
fam = QStringLiteral("Iosevka");
} else if (n == "inconsolata" || n == "inconsolataex") {
fam = QStringLiteral("Inconsolata");
} else if (n == "space" || n == "spacemono" || n == "space mono") {
fam = QStringLiteral("Space Mono");
} else if (n == "go") {
fam = QStringLiteral("Go Mono");
} else if (n == "ibm" || n == "ibm plex mono" || n == "ibm-plex-mono") {
fam = QStringLiteral("IBM Plex Mono");
} else if (n == "fira" || n == "fira code" || n == "fira-code") {
fam = QStringLiteral("Fira Code");
} else if (!name.empty()) {
fam = QString::fromStdString(name);
}
// Validate availability; choose a fallback if needed
const auto families = QFontDatabase::families();
if (!fam.isEmpty() && families.contains(fam)) {
return fam;
}
// Preferred fallback chain on macOS; otherwise, try common monospace families
const QStringList fallbacks = {
QStringLiteral("Brass Mono"),
QStringLiteral("JetBrains Mono"),
QStringLiteral("SF Mono"),
QStringLiteral("Menlo"),
QStringLiteral("Monaco"),
QStringLiteral("Courier New"),
QStringLiteral("Courier"),
QStringLiteral("Monospace")
};
for (const auto &fb: fallbacks) {
if (families.contains(fb))
return fb;
}
// As a last resort, return the request (Qt will substitute)
return fam.isEmpty() ? QStringLiteral("Monospace") : fam;
};
QString family = choose_family(config_.font);
int px_size = (config_.font_size > 0.0f) ? (int) std::lround(config_.font_size) : 18;
if (auto *mw = dynamic_cast<MainWindow *>(window_)) {
mw->SetFontFamilyAndSize(family, px_size);
}
// Track current font in globals for command/status queries
kte::gCurrentFontFamily = family.toStdString();
kte::gCurrentFontSize = static_cast<float>(px_size);
// Set initial dimensions based on font metrics
QFont f(family, px_size);
TextLayout(f).SetEditorDimensions(ed, window_->width(), window_->height());
return true;
}
void
GUIFrontend::Step(Editor &ed, bool &running)
{
// Pump Qt events
if (app_)
app_->processEvents();
// Allow deferred opens (including swap recovery prompts) to run.
ed.ProcessPendingOpens();
// Drain input queue
for (;;) {
MappedInput mi;
if (!input_.Poll(mi))
break;
if (mi.hasCommand) {
Execute(ed, mi.id, mi.arg, mi.count);
}
}
if (ed.QuitRequested()) {
running = false;
}
// --- Visual File Picker (Qt): invoked via CommandId::VisualFilePickerToggle ---
if (ed.FilePickerVisible()) {
QString startDir;
if (!ed.FilePickerDir().empty()) {
startDir = QString::fromStdString(ed.FilePickerDir());
}
QFileDialog dlg(window_, QStringLiteral("Open File"), startDir);
dlg.setFileMode(QFileDialog::ExistingFile);
if (dlg.exec() == QDialog::Accepted) {
const QStringList files = dlg.selectedFiles();
if (!files.isEmpty()) {
const QString fp = files.front();
ed.RequestOpenFile(fp.toStdString());
(void) ed.ProcessPendingOpens();
// Update picker dir for next time
QFileInfo info(fp);
ed.SetFilePickerDir(info.dir().absolutePath().toStdString());
}
}
// Close picker overlay regardless of outcome
ed.SetFilePickerVisible(false);
if (window_)
window_->update();
}
// Apply any queued theme change requests (from command handler)
if (kte::gThemeChangePending) {
if (!kte::gThemeChangeRequest.empty()) {
// Apply Qt palette theme by name; if unknown, keep current palette
(void) kte::ApplyQtThemeByName(kte::gThemeChangeRequest);
}
kte::gThemeChangePending = false;
kte::gThemeChangeRequest.clear();
if (window_)
window_->update();
}
// Visual font picker request (Qt only)
if (kte::gFontDialogRequested) {
// Seed initial font from current or default
QFont seed;
if (!kte::gCurrentFontFamily.empty()) {
seed = QFont(QString::fromStdString(kte::gCurrentFontFamily),
(int) std::lround(kte::gCurrentFontSize > 0 ? kte::gCurrentFontSize : 18));
} else {
seed = window_ ? window_->font() : QFont();
}
bool ok = false;
const QFont chosen = QFontDialog::getFont(&ok, seed, window_, QStringLiteral("Choose Editor Font"));
if (ok) {
// Queue font change via existing hooks
kte::gFontFamilyRequest = chosen.family().toStdString();
// Use pixel size if available, otherwise convert from point size approximately
int px = chosen.pixelSize();
if (px <= 0) {
// Approximate points to pixels (96 DPI assumption); Qt will rasterize appropriately
px = (int) std::lround(chosen.pointSizeF() * 96.0 / 72.0);
if (px <= 0)
px = 18;
}
kte::gFontSizeRequest = static_cast<float>(px);
kte::gFontChangePending = true;
}
kte::gFontDialogRequested = false;
if (window_)
window_->update();
}
// Apply any queued font change requests (Qt)
if (kte::gFontChangePending) {
// Derive target family
auto map_family = [](const std::string &name) -> QString {
std::string n = name;
std::transform(n.begin(), n.end(), n.begin(), [](unsigned char c) {
return (char) std::tolower(c);
});
QString fam;
if (n == "brass" || n == "brassmono" || n == "brass mono") {
fam = QStringLiteral("Brass Mono");
} else if (n == "jetbrains" || n == "jetbrains mono" || n == "jetbrains-mono") {
fam = QStringLiteral("JetBrains Mono");
} else if (n == "iosevka") {
fam = QStringLiteral("Iosevka");
} else if (n == "inconsolata" || n == "inconsolataex") {
fam = QStringLiteral("Inconsolata");
} else if (n == "space" || n == "spacemono" || n == "space mono") {
fam = QStringLiteral("Space Mono");
} else if (n == "go") {
fam = QStringLiteral("Go Mono");
} else if (n == "ibm" || n == "ibm plex mono" || n == "ibm-plex-mono") {
fam = QStringLiteral("IBM Plex Mono");
} else if (n == "fira" || n == "fira code" || n == "fira-code") {
fam = QStringLiteral("Fira Code");
} else if (!name.empty()) {
fam = QString::fromStdString(name);
}
// Validate availability; choose fallback if needed
const auto families = QFontDatabase::families();
if (!fam.isEmpty() && families.contains(fam)) {
return fam;
}
// Fallback chain
const QStringList fallbacks = {
QStringLiteral("Brass Mono"),
QStringLiteral("JetBrains Mono"),
QStringLiteral("SF Mono"),
QStringLiteral("Menlo"),
QStringLiteral("Monaco"),
QStringLiteral("Courier New"),
QStringLiteral("Courier"),
QStringLiteral("Monospace")
};
for (const auto &fb: fallbacks) {
if (families.contains(fb))
return fb;
}
return fam.isEmpty() ? QStringLiteral("Monospace") : fam;
};
QString target_family;
if (!kte::gFontFamilyRequest.empty()) {
target_family = map_family(kte::gFontFamilyRequest);
} else if (!kte::gCurrentFontFamily.empty()) {
target_family = QString::fromStdString(kte::gCurrentFontFamily);
}
int target_px = 0;
if (kte::gFontSizeRequest > 0.0f) {
target_px = (int) std::lround(kte::gFontSizeRequest);
} else if (kte::gCurrentFontSize > 0.0f) {
target_px = (int) std::lround(kte::gCurrentFontSize);
}
if (target_px <= 0)
target_px = 18;
if (target_family.isEmpty())
target_family = QStringLiteral("Monospace");
if (auto *mw = dynamic_cast<MainWindow *>(window_)) {
mw->SetFontFamilyAndSize(target_family, target_px);
}
// Update globals
kte::gCurrentFontFamily = target_family.toStdString();
kte::gCurrentFontSize = static_cast<float>(target_px);
// Reset requests
kte::gFontChangePending = false;
kte::gFontFamilyRequest.clear();
kte::gFontSizeRequest = 0.0f;
// Recompute editor dimensions to match new metrics
QFont f(target_family, target_px);
TextLayout(f).SetEditorDimensions(ed, window_ ? window_->width() : 0,
window_ ? window_->height() : 0);
if (window_)
window_->update();
}
// Draw current frame (request repaint)
renderer_.Draw(ed);
// Detect window close
if (auto *mw = dynamic_cast<MainWindow *>(window_)) {
if (mw->WasClosed()) {
running = false;
}
}
}
void
GUIFrontend::Shutdown()
{
if (window_) {
window_->close();
delete window_;
window_ = nullptr;
}
if (app_) {
delete app_;
app_ = nullptr;
}
}
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