Move the Editor to a C++ class

This commit is contained in:
Curle 2021-07-15 06:26:14 +01:00
parent 8774b20356
commit af606752b2
3 changed files with 80 additions and 92 deletions

View File

@ -5,10 +5,6 @@
*** Chroma ***
***********************/
#ifdef __cplusplus
extern "C" {
#endif
/**
* This file contains most of the symbols required to start and run the Chroma Editor.
*
@ -33,40 +29,48 @@ extern "C" {
* - Drop shadow #000000.
*/
// Stores information about a single line.
struct EditorLine {
size_t Line;
size_t Length;
char* Text;
};
// Function pointer for menu-clicked callback.
typedef void (*MenuCallback)(void);
// A single item in the menu.
struct MenuItem {
class Editor
{
public:
// Stores information about a single line.
struct EditorLine
{
size_t Line;
size_t Length;
char *Text;
};
// A single item in the menu.
struct MenuItem
{
size_t ParentID; // 0 for the root menu.
size_t ID;
MenuCallback Callback;
};
};
// The full menu that should be rendered. Can be nested.
typedef struct {
// The full menu that should be rendered. Can be nested.
typedef struct
{
size_t MenuSize;
struct MenuItem* Menu;
struct MenuItem *Menu;
size_t ActiveMenuItem;
} EditorMenu;
} EditorMenu;
struct EditorMessage {
struct EditorMessage
{
size_t TextLength;
char* Text;
char *Text;
size_t MessageWidth;
size_t MessageHeight;
};
};
// Provides all the context for rendering the editor.
struct EditorLayout {
// Provides all the context for rendering the editor.
struct EditorLayout
{
size_t ScreenWidth;
size_t ScreenHeight;
@ -80,48 +84,40 @@ struct EditorLayout {
size_t TextBoxHeight;
bool HasMessage;
struct EditorMessage* CurrentMessage;
};
struct EditorMessage *CurrentMessage;
};
// Given the kernel's keyboard handler ID, so that it may restore it at a later point.
void StartEditor(int KernelCallbackID);
private:
// =========================== Drawing routines =========================== //
// Provides all the context for manipulating state.
typedef struct {
struct EditorLayout Layout;
size_t Length; // How many lines?
size_t Size; // How many characters?
size_t CurrentLine;
size_t CurrentColumn;
struct EditorLine* Lines;
} EditorState;
size_t Length = 0; // How many lines?
size_t Size = 0; // How many characters?
size_t CurrentLine = 0;
size_t CurrentColumn = 0;
struct EditorLine *Lines;
// Draw everything.
void DrawEditor();
void DrawHeader();
void DrawBackground();
void DrawTextArea();
void DrawTextLine();
void DrawText();
void DrawMenus();
void DrawBoxes();
void DrawBoxShadows();
// Given the kernel's keyboard handler ID, so that it may restore it at a later point.
void StartEditor(int KernelCallbackID);
// =========================== State management ===========================
// =========================== Drawing routines =========================== //
// Draw everything.
void DrawEditor(EditorState* currentState);
void DrawHeader();
void DrawBackground();
void DrawTextArea();
void DrawTextLine();
void DrawText();
void DrawMenus();
void DrawBoxes();
void DrawBoxShadows();
// =========================== State management ===========================
EditorState* GetState();
// Text editing.
void GetLine(EditorState* state, size_t line);
void SetLine(EditorState* state, struct EditorLine* line);
void AppendLine(EditorState* state, struct EditorLine* line);
void AppendToLine(EditorState* state, struct EditorLine* line, size_t textLength, char* text);
void RemoveLine(EditorState* state, size_t line);
#ifdef __cplusplus
}
#endif
// Text editing.
void GetLine(size_t line);
void SetLine(struct EditorLine *line);
void AppendLine(struct EditorLine *line);
void AppendToLine(struct EditorLine *line, size_t textLength, char *text);
void RemoveLine(size_t line);
};

View File

@ -13,10 +13,10 @@
*/
static KeyboardCallback KernelHandler;
void StartEditor(int callbackID) {
void Editor::StartEditor(int callbackID) {
KernelHandler = KeyboardCallbacks[callbackID];
struct EditorLayout layout;
EditorLayout layout;
layout.ScreenHeight = PrintInfo.screenHeight;
layout.ScreenWidth = PrintInfo.screenWidth;
layout.HeaderHeight = layout.ScreenHeight / 100 * 3;

View File

@ -36,7 +36,6 @@ char* InternalBuffer;
#ifdef __cplusplus
}
#endif
/**
* C++ code! Scary!
* This is a temporary measure to experiment with the Editor system.
@ -90,10 +89,6 @@ int Main(void) {
return 0;
}
#ifdef __cplusplus
extern "C" {
#endif
void PrintPressedChar(KeyboardData data) {
if(!KernelLoaded) return;
@ -120,7 +115,8 @@ void TrackInternalBuffer(KeyboardData data) {
InternalBuffer[BufferLength] = '\0'; // Null-terminate to make checking easier
if(strcmp(InternalBuffer, "editor")) {
UninstallKBCallback(InternalBufferID);
StartEditor(CharPrinterCallbackID);
Editor editor;
editor.StartEditor(CharPrinterCallbackID);
} else if(strcmp(InternalBuffer, "zero")) {
int returnVal = sharp_entryPoint();
SerialPrintf("Sharp returned %d\r\n", returnVal);
@ -147,7 +143,3 @@ void SomethingWentWrong(const char* Message) {
void Exit(int ExitCode) {
SerialPrintf("Kernel stopped with code %x\r\n", ExitCode);
}
#ifdef __cplusplus
}
#endif