127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
#pragma once
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/************************
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*** Team Kitty, 2021 ***
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*** Chroma ***
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***********************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* This file contains most of the symbols required to start and run the Chroma Editor.
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*
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* The Editor uses a six-stage drawing system:
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* - Background
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* - Bars
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* - Text Area
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* - Text
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* - Effects
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*
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* The dimensions are derived dynamically from the Print Info settings.
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*
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* The layout is as such:
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* - 3% horizontal header, #BBBBBB.
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* - Primary text, #000084.
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* - Secondary text, #000000.
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* - 97% background, #000084.
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* - 15% optional banner, #00AAAA.
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* - 80% text area, #BBBBBB.
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* - Menus #FFFFFF.
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* - Buttons #BBBBBB.
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* - Drop shadow #000000.
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*/
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// Stores information about a single line.
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struct EditorLine {
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size_t Line;
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size_t Length;
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char* Text;
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};
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// Function pointer for menu-clicked callback.
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typedef void (*MenuCallback)(void);
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// A single item in the menu.
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struct MenuItem {
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size_t ParentID; // 0 for the root menu.
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size_t ID;
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MenuCallback Callback;
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};
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// The full menu that should be rendered. Can be nested.
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typedef struct {
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size_t MenuSize;
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struct MenuItem* Menu;
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size_t ActiveMenuItem;
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} EditorMenu;
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struct EditorMessage {
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size_t TextLength;
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char* Text;
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size_t MessageWidth;
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size_t MessageHeight;
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};
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// Provides all the context for rendering the editor.
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struct EditorLayout {
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size_t ScreenWidth;
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size_t ScreenHeight;
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size_t HeaderHeight;
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EditorMenu Menu;
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size_t TextBoxX;
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size_t TextBoxY;
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size_t TextBoxWidth;
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size_t TextBoxHeight;
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bool HasMessage;
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struct EditorMessage* CurrentMessage;
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};
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// Provides all the context for manipulating state.
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typedef struct {
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struct EditorLayout Layout;
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size_t Length; // How many lines?
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size_t Size; // How many characters?
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size_t CurrentLine;
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size_t CurrentColumn;
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struct EditorLine* Lines;
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} EditorState;
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// Given the kernel's keyboard handler ID, so that it may restore it at a later point.
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void StartEditor(int KernelCallbackID);
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// =========================== Drawing routines =========================== //
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// Draw everything.
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void DrawEditor(EditorState* currentState);
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void DrawHeader();
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void DrawBackground();
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void DrawTextArea();
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void DrawTextLine();
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void DrawText();
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void DrawMenus();
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void DrawBoxes();
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void DrawBoxShadows();
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// =========================== State management ===========================
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EditorState* GetState();
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// Text editing.
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void GetLine(EditorState* state, size_t line);
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void SetLine(EditorState* state, struct EditorLine* line);
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void AppendLine(EditorState* state, struct EditorLine* line);
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void AppendToLine(EditorState* state, struct EditorLine* line, size_t textLength, char* text);
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void RemoveLine(EditorState* state, size_t line);
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#ifdef __cplusplus
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}
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#endif |