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Fn+h on any screen, text fields included, and ? outside Text Entry, open a panel over the content area: the screen's own keys, then the ones that work everywhere. Every App declares its keys for the state it is in (pages, viewers, dialogs and text fields answer for themselves); the App manager opens the panel and takes every key while it is open. About 30 hint lines are gone, from every App. What stays on a screen is state. The first-start Setup keeps its hints and teaches the key; a device set up before gets one Toast, once. The guide and the FAQ open with it. `key help` over the consoles. 476 host tests (8 new). Checked on the device with key help and screenshots: the Launcher, all nine Apps and several of their states. 8.5 KB of flash and 40 bytes of static RAM. Decisions Q196 to Q203 in docs/milestones/U1.md. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
#pragma once
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#include <cstdint>
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#include <vector>
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#include "key_event.h"
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namespace roro {
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// The physical keyboard state as reported by the keyboard driver: every character key currently
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// held (already shifted) plus the modifier and special keys.
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struct RawKeys {
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std::vector<char> chars;
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bool fn = false;
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bool opt = false;
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bool ctrl = false;
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bool alt = false;
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bool shift = false;
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bool enter = false;
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bool del = false;
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bool tab = false;
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};
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// Turns keyboard state changes into logical KeyEvents: only newly pressed keys produce events;
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// Fn + ; . , / are arrows, and so are ; . , / alone when no text is being entered; ` is Back and
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// Fn + ` is Home; Fn + h is Help anywhere, and so is ? when no text is being entered; the Compose Key (opt) followed by an accent and a letter types the accented
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// letter (opt ' e -> é).
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class KeyMapper {
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public:
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std::vector<KeyEvent> update(const RawKeys& keys);
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// Whether the foreground App is editing text (default). Outside text entry, the arrow keys
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// don't need Fn.
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void setTextEntry(bool active) { textEntry_ = active; }
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// 0 when idle, '*' when opt was pressed, or the accent character waiting for its letter.
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char pendingCompose() const { return compose_; }
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private:
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void onChar(char c, const RawKeys& keys, std::vector<KeyEvent>& out);
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RawKeys previous_;
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char compose_ = 0;
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bool textEntry_ = true;
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};
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} // namespace roro
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