Stuff

Signed-off-by: Slendi <slendi@socopon.com>

src/App.cpp

@@ -191,13 +191,13 @@ auto App::init_wayland() -> void
 				bool meta = app->m_kbd.mod_active("Mod4");
 				if (!(ctrl || alt || meta)) {
 					if (sym == XKB_KEY_Left) {
-						app->m_kbd.typing.push_back(0);
-					} else if (sym == XKB_KEY_Down) {
 						app->m_kbd.typing.push_back(1);
-					} else if (sym == XKB_KEY_Up) {
+					} else if (sym == XKB_KEY_Down) {
 						app->m_kbd.typing.push_back(2);
-					} else if (sym == XKB_KEY_Right) {
+					} else if (sym == XKB_KEY_Up) {
 						app->m_kbd.typing.push_back(3);
+					} else if (sym == XKB_KEY_Right) {
+						app->m_kbd.typing.push_back(4);
 					} else {
 						u32 cp = xkb_keysym_to_utf32(sym);
 						if (cp >= 0x20) {
@@ -311,6 +311,7 @@ auto App::init_egl() -> void
 	InitWindow(m_win_w, m_win_h, "");
 
 	m_tr = std::make_shared<TextRenderer>();
+	m_gui = std::make_shared<ImGui>(m_tr);
 	auto const font = find_font_path();
 	assert(font && "Could not find font");
 	std::vector<std::filesystem::path> fallback_paths;

src/App.hpp

@@ -17,6 +17,7 @@ extern "C" {
 #include <wayland-egl.h>
 #include <xkbcommon/xkbcommon.h>
 
+#include "ImGui.hpp"
 #include "TextRenderer.hpp"
 #include "Theme.hpp"
 #include "common.hpp"
@@ -141,6 +142,7 @@ private:
 
 	std::shared_ptr<TextRenderer> m_tr { nullptr };
 	FontHandle m_font;
+	std::shared_ptr<ImGui> m_gui { nullptr };
 
 	enum_array<Theme, ColorScheme> m_themes { make_default_themes() };
 	Theme m_active_theme { Theme::Light };

src/ImGui.cpp

@@ -1,14 +1,17 @@
 #include "ImGui.hpp"
 
+#include <cassert>
+
+#include <raylib.h>
+
 ImGui::ImGui(std::shared_ptr<TextRenderer> text_renderer)
     : m_text_renderer(text_renderer)
 {
 }
 
-void ImGui::begin(
-    std::pmr::vector<u32> const input_runes, bool ctrl, bool shift)
+void ImGui::begin(u32 const rune, bool ctrl, bool shift)
 {
-	m_input_runes = input_runes;
+	m_rune = rune;
 	m_ctrl = ctrl;
 	m_shift = shift;
 }
@@ -18,9 +21,30 @@ void ImGui::end() { }
 auto ImGui::text_input(std::size_t id, std::pmr::string &str, Rectangle rec,
     TextInputOptions options) -> std::bitset<2>
 {
+	assert(id != 0);
+
 	bool submitted { false };
 	bool changed { false };
 
+	if (!m_ti_states.contains(id)) {
+		m_ti_states[id] = {};
+	}
+
+	assert(!options.multiline && "Multiline not yet implemented.");
+
+	if (options.font_size > rec.height) {
+		TraceLog(LOG_WARNING,
+		    std::format("Text size for text input {} is bigger than height ({} "
+		                "> {}). Clipping will occur.",
+		        id, options.font_size, rec.height)
+		        .c_str());
+	}
+
+	BeginScissorMode(rec.x, rec.y, rec.width, rec.height);
+	{
+	}
+	EndScissorMode();
+
 	return std::bitset<2> { static_cast<unsigned long long>(
 		(submitted ? 1 : 0) | (changed ? 2 : 0)) };
 }

src/ImGui.hpp

@@ -7,8 +7,11 @@
 
 #include "TextRenderer.hpp"
 
+constexpr float DEFAULT_FONT_SIZE { 16 };
+
 struct TextInputOptions {
 	bool multiline { false };
+	float font_size { DEFAULT_FONT_SIZE };
 };
 
 struct ImGui {
@@ -19,7 +22,7 @@ struct ImGui {
 	ImGui(ImGui &&) = default;
 	auto operator=(ImGui &&) -> ImGui & = default;
 
-	void begin(std::pmr::vector<u32> const input_runes, bool ctrl, bool shift);
+	void begin(u32 const rune, bool ctrl, bool shift);
 	void end();
 
 	// Bit 0 -> Submitted
@@ -36,11 +39,13 @@ struct ImGui {
 private:
 	struct TextInputState {
 		int current_rune_idx { 0 };
+		Vector2 scroll_offset;   // y not used if multiline == false
+		Vector2 cursor_position; // y not used if multiline == false
 	};
 
 	std::unordered_map<std::size_t, TextInputState> m_ti_states;
-	std::size_t m_focused {};
-	std::pmr::vector<u32> m_input_runes {}; // 0123 <-> hjkl arrow keys
+	std::size_t m_focused_id {};
+	u32 m_rune {}; // 1234 <-> hjkl arrow keys
 	bool m_ctrl {};
 	bool m_shift {};
 
@@ -48,14 +53,14 @@ private:
 };
 
 struct ImGuiGuard {
-	ImGuiGuard(ImGui *imgui, std::pmr::vector<u32> const input_runes, bool ctrl,
-	    bool shift)
+	ImGuiGuard(std::shared_ptr<ImGui> imgui, u32 const rune, bool const ctrl,
+	    bool const shift)
 	    : m_imgui(imgui)
 	{
-		m_imgui->begin(input_runes, ctrl, shift);
+		m_imgui->begin(rune, ctrl, shift);
 	}
 	~ImGuiGuard() { m_imgui->end(); }
 
 private:
-	ImGui *m_imgui { nullptr };
+	std::shared_ptr<ImGui> m_imgui { nullptr };
 };

src/Tick.cpp

@@ -1,26 +1,23 @@
 #include "App.hpp"
 
+#include <cassert>
+
 #include <EGL/egl.h>
 #include <GLES3/gl3.h>
-#include <print>
 #include <raylib.h>
 #include <rlgl.h>
 #include <xkbcommon/xkbcommon.h>
 
 auto App::tick() -> void
 {
+	static std::pmr::string text_input_data;
+
 	if (!m_visible || m_gl.edpy == EGL_NO_DISPLAY
 	    || m_gl.esurf == EGL_NO_SURFACE)
 		return;
 
 	glViewport(0, 0, m_win_w, m_win_h);
 
-	for (auto const cp : m_kbd.typing) {
-		std::println("Char typed: {} ({})  shift={} ctrl={}",
-		    rune_to_string(cp), cp, m_kbd.shift() ? 'y' : 'n',
-		    m_kbd.ctrl() ? 'y' : 'n');
-	}
-
 	if (m_kbd.is_sym_pressed(XKB_KEY_Escape)) {
 		set_visible(!visible());
 		if (m_kbd.ctrl() && m_kbd.shift()) {
@@ -33,12 +30,22 @@ auto App::tick() -> void
 	ClearBackground(theme().window.background);
 
 	DrawFPS(10, 10);
-	if (m_tr) {
-		Color const fg = theme().foreground;
-		Vector2 const pos { 40.0f, 60.0f };
-		auto text = std::string_view("Hello from Waylight! 日本人ですか?");
-		auto size = sin(GetTime()) * 12 + 32;
-		m_tr->draw_text(m_font, text, pos, size, fg);
+	{
+		assert(m_gui);
+		u32 rune { 0 };
+		if (!m_kbd.typing.empty()) {
+			rune = m_kbd.typing.back();
+			m_kbd.typing.clear();
+		}
+		ImGuiGuard gui_scope(m_gui, rune, m_kbd.ctrl(), m_kbd.shift());
+
+		m_gui->text_input(1, text_input_data,
+		    {
+		        0,
+		        0,
+		        static_cast<float>(GetScreenWidth()),
+		        static_cast<float>(GetScreenHeight()),
+		    });
 	}
 
 	EndDrawing();