Kyle Isom
b60a8dc491
Large files made idle CPU spike because every frame re-measured every line, recompiled the search regex per line, and ran full per-line rendering work even for off-screen rows. - Render only visible rows (with a small margin for smooth scrolling) and advance the layout cursor to preserve total content height. - Hoist the search std::regex compilation out of the per-line loop. - Cache the max line width on the renderer; reset only when the buffer or font changes, not on every edit. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
/*
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* ImGuiRenderer - ImGui-based renderer for GUI mode
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*/
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#pragma once
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#include <cstdint>
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#include <string>
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#include "Renderer.h"
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struct ImFont;
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class Buffer;
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class ImGuiRenderer final : public Renderer {
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public:
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ImGuiRenderer() = default;
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~ImGuiRenderer() override = default;
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void Draw(Editor &ed) override;
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private:
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// Per-window scroll tracking for two-way sync between Buffer offsets and ImGui scroll.
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// These must be per-instance (not static) so each window maintains independent state.
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long prev_buf_rowoffs_ = -1;
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long prev_buf_coloffs_ = -1;
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float prev_scroll_y_ = -1.0f;
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float prev_scroll_x_ = -1.0f;
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bool mouse_selecting_ = false;
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// Max-line-width cache for the horizontal scrollbar. Measuring every line
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// every frame is prohibitively expensive on large files; we only update the
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// running max from visible lines and reset when buffer/version/font changes.
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const Buffer *max_width_buf_ = nullptr;
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std::uint64_t max_width_version_ = 0;
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ImFont *max_width_font_ = nullptr;
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float max_width_font_size_ = 0.0f;
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float max_width_px_ = 0.0f;
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};
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