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typer.cpp
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typer.cpp
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#include <windows.h>
#include "resource.h"
typedef struct {
wchar_t filename[MAX_PATH];
LOGFONT font;
BOOL hasUnsavedChanges;
} DOCUMENT_STATE;
typedef struct {
DOCUMENT_STATE document;
HWND hWnd;
HWND hWndEdit;
HINSTANCE hInstance;
HICON hIcon;
HFONT hFont;
} APP_STATE;
APP_STATE app;
const UINT TYPER_EDIT_ID = 0x573;
const wchar_t* TYPER_WNDCLASS = L"Typer";
const wchar_t* TYPER_CONFIG_FILENAME = L"C:\\typer.ini";
void Typer_UpdateTitlebar() {
const wchar_t* suffixUnchanged = L"";
const wchar_t* suffixChanged = L"*";
enum { BUFSIZE = MAX_PATH * 2 };
wchar_t titleBuffer[BUFSIZE];
ZeroMemory(titleBuffer, BUFSIZE);
wchar_t* filenameOrUntitled = lstrlen(app.document.filename) ? app.document.filename : L"Untitled";
wsprintf(titleBuffer, L"%s%s - Typer", filenameOrUntitled,
app.document.hasUnsavedChanges ? suffixChanged : suffixUnchanged);
SetWindowText(app.hWnd, titleBuffer);
}
void Typer_FilenameChange(const wchar_t* filename) {
lstrcpy(app.document.filename, filename);
Typer_UpdateTitlebar();
}
BOOL Typer_OpenFile(const wchar_t* filename) {
BOOL success = FALSE;
BYTE* fileBuffer = (BYTE*)GlobalAlloc(GMEM_FIXED, 1024 * 1024);
BYTE* filePosition = fileBuffer;
// Open the file handle
HANDLE file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (file != INVALID_HANDLE_VALUE) {
// Read the contents of the file
enum { BUFSIZE = 4096 };
BYTE readBuffer[BUFSIZE];
DWORD bytesRead = 0;
while (ReadFile(file, readBuffer, BUFSIZE, &bytesRead, NULL) && (bytesRead != 0)) {
memcpy(filePosition, readBuffer, bytesRead);
filePosition += bytesRead;
}
*filePosition = 0;
if (filePosition != fileBuffer) {
app.document.hasUnsavedChanges = FALSE;
Typer_FilenameChange(filename);
SetWindowTextA(app.hWndEdit, (char*)fileBuffer);
success = TRUE;
}
CloseHandle(file);
}
GlobalFree(fileBuffer);
return success;
}
BOOL Typer_SaveFile(const wchar_t* filename) {
BOOL success = FALSE;
enum { BUFSIZE = 1024 * 1024 };
char* fileBuffer = (char*)GlobalAlloc(GMEM_FIXED, BUFSIZE);
int length = GetWindowTextA(app.hWndEdit, fileBuffer, BUFSIZE);
if (length != 0) {
HANDLE file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file != INVALID_HANDLE_VALUE) {
DWORD bytesWritten = 0;
if (WriteFile(file, fileBuffer, length, &bytesWritten, NULL)) {
if (bytesWritten == length) {
app.document.hasUnsavedChanges = FALSE;
Typer_FilenameChange(filename);
success = TRUE;
}
}
CloseHandle(file);
}
}
GlobalFree(fileBuffer);
return success;
}
void Typer_ShowSaveAs() {
wchar_t filenameBuffer[MAX_PATH];
ZeroMemory(&filenameBuffer, MAX_PATH * sizeof(wchar_t));
OPENFILENAME ofn = { 0 };
ofn.lStructSize = sizeof(ofn);
ofn.hInstance = app.hInstance;
ofn.hwndOwner = app.hWnd;
ofn.lpstrTitle = L"Save As";
ofn.lpstrFilter = L"Text Files (*.txt)\0*.txt\0All Files (*.*)\0*.*\0";
ofn.lpstrFile = filenameBuffer;
ofn.nMaxFile = MAX_PATH;
if (GetSaveFileName(&ofn)) {
Typer_SaveFile(filenameBuffer);
}
}
void Typer_SaveOrPrompt() {
if (lstrlen(app.document.filename) == 0) {
Typer_ShowSaveAs();
} else {
Typer_SaveFile(app.document.filename);
}
}
LRESULT CALLBACK Typer_WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
switch (msg) {
case WM_CREATE: {
app.hWndEdit = CreateWindowEx(WS_EX_CLIENTEDGE, L"EDIT", L"", WS_CHILD | ES_MULTILINE,
0, 0, 0, 0, hWnd, (HMENU)TYPER_EDIT_ID, app.hInstance, NULL);
app.hWnd = hWnd;
app.hFont = CreateFontIndirect(&app.document.font);
SendMessage(app.hWndEdit, WM_SETFONT, (WPARAM)app.hFont, TRUE);
Typer_UpdateTitlebar();
ShowWindow(app.hWndEdit, SW_SHOW);
ShowWindow(hWnd, SW_SHOW);
InvalidateRect(hWnd, NULL, TRUE);
break;
}
case WM_SIZE: {
RECT rect;
int width;
int height;
GetClientRect(hWnd, &rect);
width = rect.right - rect.left;
height = rect.bottom - rect.top;
MoveWindow(app.hWndEdit, 0, 0, width, height, FALSE);
break;
}
case WM_COMMAND: {
UINT id = LOWORD(wParam);
switch (id) {
case TYPER_EDIT_ID: {
UINT notification = HIWORD(wParam);
if (notification == EN_CHANGE) {
app.document.hasUnsavedChanges = TRUE;
Typer_UpdateTitlebar();
}
break;
}
case ID_TYPER_FILE_OPEN: {
wchar_t filenameBuffer[MAX_PATH];
ZeroMemory(&filenameBuffer, MAX_PATH * sizeof(wchar_t));
OPENFILENAME ofn = { 0 };
ofn.lStructSize = sizeof(ofn);
ofn.hInstance = app.hInstance;
ofn.hwndOwner = hWnd;
ofn.lpstrTitle = L"Open File";
ofn.lpstrFilter = L"Text Files (*.txt)\0*.txt\0All Files (*.*)\0*.*\0";
ofn.lpstrFile = filenameBuffer;
ofn.nMaxFile = MAX_PATH;
if (GetOpenFileName(&ofn)) {
Typer_OpenFile(filenameBuffer);
}
break;
}
case ID_TYPER_FILE_SAVE: {
// Check to see if app.document.filename is valid
Typer_SaveOrPrompt();
break;
}
case ID_TYPER_FILE_SAVE_AS: {
Typer_ShowSaveAs();
break;
}
case ID_TYPER_FORMAT_FONT: {
LOGFONT logfont = { 0 };
CHOOSEFONT cf = { 0 };
cf.lStructSize = sizeof(CHOOSEFONT);
cf.hwndOwner = hWnd;
cf.lpLogFont = &logfont;
cf.hInstance = app.hInstance;
cf.nFontType = SCREEN_FONTTYPE;
cf.Flags = CF_SCREENFONTS;
if (ChooseFont(&cf)) {
if (app.hFont != NULL) {
DeleteObject(app.hFont);
}
app.hFont = CreateFontIndirect(&logfont);
memcpy(&app.document.font, &logfont, sizeof(LOGFONT));
SendMessage(app.hWndEdit, WM_SETFONT, (WPARAM)app.hFont, TRUE);
}
break;
}
case ID_HELP_ABOUT: {
wchar_t* aboutText = L"Typer Version 0.2\r\nby @rogerclark\r\ngreetz to EFnet #winprog & Twitch chat";
MessageBox(NULL, aboutText, L"About", MB_OK);
break;
}
case ID_FILE_EXIT: {
DestroyWindow(hWnd);
break;
}
}
break;
}
case WM_CLOSE: {
BOOL shouldClose = FALSE;
if (app.document.hasUnsavedChanges) {
UINT result = MessageBox(hWnd, L"The file has unsaved changes. Do you want to save?",
L"Typer", MB_YESNOCANCEL | MB_ICONWARNING);
if (result == IDYES) {
Typer_SaveOrPrompt();
shouldClose = TRUE;
} else if (result == IDNO) {
shouldClose = TRUE;
} else if (result == IDCANCEL) {
shouldClose = FALSE;
}
} else {
shouldClose = TRUE;
}
// if shouldClose is TRUE, then DefWindowProc will call DestroyWindow()
if (shouldClose == FALSE) {
return 0;
}
break;
}
case WM_DESTROY: {
if (app.hFont != NULL) {
DeleteObject(app.hFont);
}
PostQuitMessage(0);
break;
}
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}
BOOL Typer_RegisterClass(HINSTANCE instance) {
WNDCLASSEX wc = { 0 };
ZeroMemory(&wc, sizeof(WNDCLASSEX));
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = Typer_WndProc;
wc.hInstance = instance;
wc.lpszClassName = TYPER_WNDCLASS;
wc.lpszMenuName = MAKEINTRESOURCE(IDM_TYPER);
wc.hIcon = LoadIcon(instance, MAKEINTRESOURCE(IDI_TYPER));
return (RegisterClassEx(&wc) != 0);
}
BOOL WritePrivateProfileInt(const wchar_t* section, const wchar_t* keyname, LONG value, const wchar_t* inifile) {
wchar_t valueString[32] = { 0 };
wsprintf(valueString, L"%d", value);
return WritePrivateProfileString(section, keyname, valueString, inifile);
}
const wchar_t* TYPER_CONFIG_KEY_FONT = L"Font";
void Typer_SaveSettings() {
WritePrivateProfileString(TYPER_CONFIG_KEY_FONT, L"FaceName", app.document.font.lfFaceName, TYPER_CONFIG_FILENAME);
WritePrivateProfileInt(TYPER_CONFIG_KEY_FONT, L"Weight", app.document.font.lfWeight, TYPER_CONFIG_FILENAME);
WritePrivateProfileInt(TYPER_CONFIG_KEY_FONT, L"Height", app.document.font.lfHeight, TYPER_CONFIG_FILENAME);
WritePrivateProfileInt(TYPER_CONFIG_KEY_FONT, L"Italic", app.document.font.lfItalic, TYPER_CONFIG_FILENAME);
}
void Typer_LoadSettings() {
GetPrivateProfileString(TYPER_CONFIG_KEY_FONT, L"FaceName", L"Courier New", app.document.font.lfFaceName, LF_FACESIZE, TYPER_CONFIG_FILENAME);
app.document.font.lfWeight = GetPrivateProfileInt(TYPER_CONFIG_KEY_FONT, L"Weight", 400, TYPER_CONFIG_FILENAME);
app.document.font.lfHeight = (INT)GetPrivateProfileInt(TYPER_CONFIG_KEY_FONT, L"Height", -27, TYPER_CONFIG_FILENAME);
app.document.font.lfItalic = GetPrivateProfileInt(TYPER_CONFIG_KEY_FONT, L"Italic", 0, TYPER_CONFIG_FILENAME);
}
int WINAPI WinMain(HINSTANCE instance, HINSTANCE prevInstance, PSTR cmdLine, int show) {
if (!Typer_RegisterClass(instance)) {
MessageBox(NULL, L"Couldn't register window class!", L"Error", MB_OK | MB_ICONERROR);
}
ZeroMemory(&app, sizeof(APP_STATE));
app.hInstance = instance;
Typer_LoadSettings();
app.hWnd = CreateWindowEx(0, TYPER_WNDCLASS, L"Typer", WS_OVERLAPPEDWINDOW, 0, 0, 960, 540, NULL, NULL, instance, NULL);
MSG msg = { 0 };
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
Typer_SaveSettings();
return 0;
}