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Fix void crash in kge.
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This commit is contained in:
Kyle Isom
2025-11-30 21:51:03 -08:00
parent e7eb35626c
commit 35e957b326
3 changed files with 79 additions and 73 deletions
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139
GUIRenderer.cc
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@@ -151,14 +151,14 @@ GUIRenderer::Draw(Editor &ed)
}
}
}
// Handle mouse click before rendering to avoid dependent on drawn items
if (ImGui::IsWindowHovered() && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
ImVec2 mp = ImGui::GetIO().MousePos;
// Compute viewport-relative row so (0) is top row of the visible area
float vy_f = (mp.y - list_origin.y - scroll_y) / row_h;
long vy = static_cast<long>(vy_f);
if (vy < 0)
vy = 0;
// Handle mouse click before rendering to avoid dependent on drawn items
if (ImGui::IsWindowHovered() && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
ImVec2 mp = ImGui::GetIO().MousePos;
// Compute viewport-relative row so (0) is top row of the visible area
float vy_f = (mp.y - list_origin.y - scroll_y) / row_h;
long vy = static_cast<long>(vy_f);
if (vy < 0)
vy = 0;
// Clamp vy within visible content height to avoid huge jumps
ImVec2 cr_min = ImGui::GetWindowContentRegionMin();
@@ -170,70 +170,75 @@ GUIRenderer::Draw(Editor &ed)
if (vy >= vis_rows)
vy = vis_rows - 1;
// Translate viewport row to buffer row using Buffer::Rowoffs
std::size_t by = buf->Rowoffs() + static_cast<std::size_t>(vy);
if (by >= lines.size()) {
if (!lines.empty())
by = lines.size() - 1;
else
by = 0;
}
// Translate viewport row to buffer row using Buffer::Rowoffs
std::size_t by = buf->Rowoffs() + static_cast<std::size_t>(vy);
if (by >= lines.size()) {
if (!lines.empty())
by = lines.size() - 1;
else
by = 0;
}
// Compute desired pixel X inside the viewport content (subtract horizontal scroll)
float px = (mp.x - list_origin.x - scroll_x);
if (px < 0.0f)
px = 0.0f;
// Compute desired pixel X inside the viewport content (subtract horizontal scroll)
float px = (mp.x - list_origin.x - scroll_x);
if (px < 0.0f)
px = 0.0f;
// Convert pixel X to a render-column target including horizontal col offset
// Use our own tab expansion of width 8 to match command layer logic.
const std::string &line_clicked = lines[by];
const std::size_t tabw = 8;
// We iterate source columns computing absolute rendered column (rx_abs) from 0,
// then translate to viewport-space by subtracting Coloffs.
std::size_t coloffs = buf->Coloffs();
std::size_t rx_abs = 0; // absolute rendered column
std::size_t i = 0; // source column iterator
// Empty buffer guard: if there are no lines yet, just move to 0:0
if (lines.empty()) {
Execute(ed, CommandId::MoveCursorTo, std::string("0:0"));
} else {
// Convert pixel X to a render-column target including horizontal col offset
// Use our own tab expansion of width 8 to match command layer logic.
const std::string &line_clicked = lines[by];
const std::size_t tabw = 8;
// We iterate source columns computing absolute rendered column (rx_abs) from 0,
// then translate to viewport-space by subtracting Coloffs.
std::size_t coloffs = buf->Coloffs();
std::size_t rx_abs = 0; // absolute rendered column
std::size_t i = 0; // source column iterator
// Fast-forward i until rx_abs >= coloffs to align with leftmost visible column
if (!line_clicked.empty() && coloffs > 0) {
while (i < line_clicked.size() && rx_abs < coloffs) {
if (line_clicked[i] == '\t') {
rx_abs += (tabw - (rx_abs % tabw));
} else {
rx_abs += 1;
}
++i;
}
}
// Fast-forward i until rx_abs >= coloffs to align with leftmost visible column
if (!line_clicked.empty() && coloffs > 0) {
while (i < line_clicked.size() && rx_abs < coloffs) {
if (line_clicked[i] == '\t') {
rx_abs += (tabw - (rx_abs % tabw));
} else {
rx_abs += 1;
}
++i;
}
}
// Now search for closest source column to clicked px within/after viewport
std::size_t best_col = i; // default to first visible column
float best_dist = std::numeric_limits<float>::infinity();
while (true) {
// For i in [current..size], evaluate candidate including the implicit end position
std::size_t rx_view = (rx_abs >= coloffs) ? (rx_abs - coloffs) : 0;
float rx_px = static_cast<float>(rx_view) * space_w;
float dist = std::fabs(px - rx_px);
if (dist <= best_dist) {
best_dist = dist;
best_col = i;
}
if (i == line_clicked.size())
break;
// advance to next source column
if (line_clicked[i] == '\t') {
rx_abs += (tabw - (rx_abs % tabw));
} else {
rx_abs += 1;
}
++i;
}
// Now search for closest source column to clicked px within/after viewport
std::size_t best_col = i; // default to first visible column
float best_dist = std::numeric_limits<float>::infinity();
while (true) {
// For i in [current..size], evaluate candidate including the implicit end position
std::size_t rx_view = (rx_abs >= coloffs) ? (rx_abs - coloffs) : 0;
float rx_px = static_cast<float>(rx_view) * space_w;
float dist = std::fabs(px - rx_px);
if (dist <= best_dist) {
best_dist = dist;
best_col = i;
}
if (i == line_clicked.size())
break;
// advance to next source column
if (line_clicked[i] == '\t') {
rx_abs += (tabw - (rx_abs % tabw));
} else {
rx_abs += 1;
}
++i;
}
// Dispatch absolute buffer coordinates (row:col)
char tmp[64];
std::snprintf(tmp, sizeof(tmp), "%zu:%zu", by, best_col);
Execute(ed, CommandId::MoveCursorTo, std::string(tmp));
}
// Dispatch absolute buffer coordinates (row:col)
char tmp[64];
std::snprintf(tmp, sizeof(tmp), "%zu:%zu", by, best_col);
Execute(ed, CommandId::MoveCursorTo, std::string(tmp));
}
}
// Cache current horizontal offset in rendered columns
const std::size_t coloffs_now = buf->Coloffs();
for (std::size_t i = rowoffs; i < lines.size(); ++i) {