refactor: split login screen implementation
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/*
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* login.hpp
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* Shared types and helpers for the MontaukOS login screen
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* Copyright (c) 2026 Daniel Hammer
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*/
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#pragma once
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#include <cstdint>
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#include <montauk/syscall.h>
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#include <montauk/string.h>
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#include <montauk/heap.h>
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#include <montauk/user.h>
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#include <montauk/config.h>
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#include <gui/gui.hpp>
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#include <gui/framebuffer.hpp>
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#include <gui/draw.hpp>
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#include <gui/font.hpp>
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extern "C" {
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unsigned char* stbi_load_from_memory(const unsigned char* buffer, int len,
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int* x, int* y, int* channels_in_file,
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int desired_channels);
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void stbi_image_free(void* retval_from_stbi_load);
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}
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enum LoginMode {
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MODE_FIRST_BOOT,
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MODE_LOGIN,
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};
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struct FieldEditState {
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int cursor;
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int sel_anchor;
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int sel_end;
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bool has_selection;
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};
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struct LoginState {
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gui::Framebuffer fb;
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int screen_w, screen_h;
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LoginMode mode;
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int active_field;
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char username[32];
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int username_len;
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char display_name[64];
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int display_name_len;
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char password[64];
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int password_len;
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char confirm[64];
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int confirm_len;
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char error_msg[128];
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bool show_error;
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Montauk::MouseState mouse;
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uint8_t prev_buttons;
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FieldEditState username_edit;
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FieldEditState display_name_edit;
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FieldEditState password_edit;
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FieldEditState confirm_edit;
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uint32_t* bg_wallpaper;
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int bg_wallpaper_w, bg_wallpaper_h;
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bool has_wallpaper;
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};
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inline constexpr gui::Color BG_COLOR = gui::Color::from_rgb(0x00, 0x00, 0x00);
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inline constexpr gui::Color CARD_BG = gui::colors::WINDOW_BG;
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inline constexpr gui::Color CARD_BORDER = gui::colors::BORDER;
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inline constexpr gui::Color TITLEBAR_BG = gui::colors::TITLEBAR_BG;
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inline constexpr gui::Color FOOTER_BG = gui::Color::from_rgb(0xF7, 0xF7, 0xF7);
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inline constexpr gui::Color FIELD_BG = gui::colors::WHITE;
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inline constexpr gui::Color FIELD_BG_ACTIVE = gui::Color::from_rgb(0xFA, 0xFC, 0xFF);
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inline constexpr gui::Color FIELD_BORDER = gui::colors::BORDER;
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inline constexpr gui::Color FIELD_HOVER = gui::Color::from_rgb(0xB7, 0xC7, 0xE8);
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inline constexpr gui::Color FIELD_ACTIVE = gui::colors::ACCENT;
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inline constexpr gui::Color BTN_COLOR = gui::colors::ACCENT;
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inline constexpr gui::Color BTN_HOVER = gui::Color::from_rgb(0x2B, 0x6B, 0xE0);
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inline constexpr gui::Color BTN_TEXT = gui::colors::WHITE;
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inline constexpr gui::Color SECONDARY_BTN_BG = gui::Color::from_rgb(0xE8, 0xE8, 0xE8);
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inline constexpr gui::Color SECONDARY_BTN_HOVER = gui::Color::from_rgb(0xDC, 0xDC, 0xDC);
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inline constexpr gui::Color SECONDARY_BTN_BORDER = gui::colors::BORDER;
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inline constexpr gui::Color TEXT_COLOR = gui::colors::TEXT_COLOR;
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inline constexpr gui::Color LABEL_COLOR = gui::Color::from_rgb(0x66, 0x66, 0x66);
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inline constexpr gui::Color ERROR_COLOR = gui::Color::from_rgb(0xC0, 0x33, 0x33);
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inline constexpr gui::Color FIELD_SEL_BG = gui::Color::from_rgb(0xB0, 0xD0, 0xF0);
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inline constexpr int CARD_W = 432;
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inline constexpr int TITLEBAR_H = 30;
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inline constexpr int FOOTER_H = 58;
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inline constexpr int FIELD_H = 34;
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inline constexpr int FIELD_PAD = 10;
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inline constexpr int BTN_H = 30;
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inline constexpr int LABEL_GAP = 4;
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inline constexpr int CONTENT_PAD_X = 24;
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inline constexpr int CONTENT_TOP_PAD = 18;
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inline constexpr int BODY_BOTTOM_PAD = 18;
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inline constexpr int FIELD_GAP = 12;
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inline constexpr int POWER_BTN_W = 104;
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inline constexpr int POWER_BTN_GAP = 8;
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inline constexpr int FOOTER_PAD = 16;
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inline constexpr int PASSWORD_MASK_CODEPOINT = 0x2022;
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struct LoginLayout {
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gui::Rect card;
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gui::Rect titlebar;
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gui::Rect footer;
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gui::Rect username_field;
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gui::Rect display_name_field;
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gui::Rect password_field;
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gui::Rect confirm_field;
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gui::Rect submit_button;
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gui::Rect shutdown_button;
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gui::Rect reboot_button;
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int content_x;
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int content_w;
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int heading_y;
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int subtitle_y;
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int error_y;
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const char* window_title;
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const char* heading;
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const char* subtitle;
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const char* submit_label;
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};
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struct LoginField {
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char* text;
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int* len;
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int max_len;
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bool is_password;
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FieldEditState* edit;
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};
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bool load_login_wallpaper(LoginState* ls);
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LoginField get_field(LoginState* ls, int field);
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void reset_field_edit(FieldEditState* edit);
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void clear_field_selection(FieldEditState* edit);
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void clear_all_field_selections(LoginState* ls);
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void clamp_field_edit(FieldEditState* edit, int len);
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void field_sel_range(const FieldEditState* edit, int* out_s, int* out_e);
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void start_field_selection(FieldEditState* edit);
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void update_field_selection(FieldEditState* edit);
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int copy_slice(char* out, int cap, const char* text, int start, int end);
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int slice_width(const char* text, int start, int end);
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int compute_view_start(const char* text, int len, int max_text_w, int cursor);
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int compute_view_end(const char* text, int len, int max_text_w, int view_start);
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int field_cursor_from_mouse_x(const char* text, int len, int max_text_w,
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int anchor_cursor, int rel_x);
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void delete_field_range(char* buf, int* len, int start, int count);
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void delete_field_selection(char* buf, int* len, FieldEditState* edit);
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int password_mask_advance();
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int password_slice_width(int start, int end);
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int compute_password_view_start(int len, int max_text_w, int cursor);
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int compute_password_view_end(int len, int max_text_w, int view_start);
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int password_cursor_from_mouse_x(int len, int max_text_w, int anchor_cursor, int rel_x);
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LoginLayout layout_login_screen(LoginState* ls);
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void draw_login_screen(LoginState* ls);
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int max_fields(LoginState* ls);
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bool try_first_boot_submit(LoginState* ls);
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bool try_login(LoginState* ls);
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void handle_key(LoginState* ls, const Montauk::KeyEvent& key);
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void handle_mouse(LoginState* ls);
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