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/*
*******************************************************************************
*
* © 2016 and later: Unicode, Inc. and others.
* License & terms of use: http://www.unicode.org/copyright.html#License
*
*******************************************************************************
*******************************************************************************
*
* Copyright (C) 1999-2007, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: Layout.cpp
*
* created on: 08/03/2000
* created by: Eric R. Mader
*/
#include <windows.h>
#include <stdio.h>
#include "paragraph.h"
#include "GDIGUISupport.h"
#include "GDIFontMap.h"
#include "UnicodeReader.h"
#include "ScriptCompositeFontInstance.h"
#include "resource.h"
#define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
struct Context
{
le_int32 width;
le_int32 height;
Paragraph *paragraph;
};
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
#define APP_NAME "LayoutSample"
TCHAR szAppName[] = TEXT(APP_NAME);
void PrettyTitle(HWND hwnd, char *fileName)
{
char title[MAX_PATH + 64];
sprintf(title, "%s - %s", APP_NAME, fileName);
SetWindowTextA(hwnd, title);
}
void InitParagraph(HWND hwnd, Context *context)
{
SCROLLINFO si;
if (context->paragraph != NULL) {
// FIXME: does it matter what we put in the ScrollInfo
// if the window's been minimized?
if (context->width > 0 && context->height > 0) {
context->paragraph->breakLines(context->width, context->height);
}
si.cbSize = sizeof si;
si.fMask = SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL;
si.nMin = 0;
si.nMax = context->paragraph->getLineCount() - 1;
si.nPage = context->height / context->paragraph->getLineHeight();
SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
}
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
HWND hwnd;
HACCEL hAccel;
MSG msg;
WNDCLASS wndclass;
LEErrorCode status = LE_NO_ERROR;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = sizeof(LONG);
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = szAppName;
wndclass.lpszClassName = szAppName;
if (!RegisterClass(&wndclass)) {
MessageBox(NULL, TEXT("This demo only runs on Windows 2000!"), szAppName, MB_ICONERROR);
return 0;
}
hAccel = LoadAccelerators(hInstance, szAppName);
hwnd = CreateWindow(szAppName, NULL,
WS_OVERLAPPEDWINDOW | WS_VSCROLL,
CW_USEDEFAULT, CW_USEDEFAULT,
600, 400,
NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0)) {
if (!TranslateAccelerator(hwnd, hAccel, &msg)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
UnregisterClass(szAppName, hInstance);
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
Context *context;
static le_int32 windowCount = 0;
static GDIFontMap *fontMap = NULL;
static GDISurface *surface = NULL;
static GDIGUISupport *guiSupport = new GDIGUISupport();
static ScriptCompositeFontInstance *font = NULL;
switch (message) {
case WM_CREATE:
{
LEErrorCode fontStatus = LE_NO_ERROR;
hdc = GetDC(hwnd);
surface = new GDISurface(hdc);
fontMap = new GDIFontMap(surface, "FontMap.GDI", 24, guiSupport, fontStatus);
font = new ScriptCompositeFontInstance(fontMap);
if (LE_FAILURE(fontStatus)) {
ReleaseDC(hwnd, hdc);
return -1;
}
context = new Context();
context->width = 600;
context->height = 400;
context->paragraph = Paragraph::paragraphFactory("Sample.txt", font, guiSupport);
SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) context);
windowCount += 1;
ReleaseDC(hwnd, hdc);
PrettyTitle(hwnd, "Sample.txt");
return 0;
}
case WM_SIZE:
{
context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
context->width = LOWORD(lParam);
context->height = HIWORD(lParam);
InitParagraph(hwnd, context);
return 0;
}
case WM_VSCROLL:
{
SCROLLINFO si;
le_int32 vertPos;
si.cbSize = sizeof si;
si.fMask = SIF_ALL;
GetScrollInfo(hwnd, SB_VERT, &si);
vertPos = si.nPos;
switch (LOWORD(wParam))
{
case SB_TOP:
si.nPos = si.nMin;
break;
case SB_BOTTOM:
si.nPos = si.nMax;
break;
case SB_LINEUP:
si.nPos -= 1;
break;
case SB_LINEDOWN:
si.nPos += 1;
break;
case SB_PAGEUP:
si.nPos -= si.nPage;
break;
case SB_PAGEDOWN:
si.nPos += si.nPage;
break;
case SB_THUMBTRACK:
si.nPos = si.nTrackPos;
break;
default:
break;
}
si.fMask = SIF_POS;
SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
GetScrollInfo(hwnd, SB_VERT, &si);
context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
if (context->paragraph != NULL && si.nPos != vertPos) {
ScrollWindow(hwnd, 0, context->paragraph->getLineHeight() * (vertPos - si.nPos), NULL, NULL);
UpdateWindow(hwnd);
}
return 0;
}
case WM_PAINT:
{
PAINTSTRUCT ps;
SCROLLINFO si;
le_int32 firstLine, lastLine;
hdc = BeginPaint(hwnd, &ps);
SetBkMode(hdc, TRANSPARENT);
si.cbSize = sizeof si;
si.fMask = SIF_ALL;
GetScrollInfo(hwnd, SB_VERT, &si);
firstLine = si.nPos;
context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
if (context->paragraph != NULL) {
surface->setHDC(hdc);
// NOTE: si.nPos + si.nPage may include a partial line at the bottom
// of the window. We need this because scrolling assumes that the
// partial line has been painted.
lastLine = min (si.nPos + (le_int32) si.nPage, context->paragraph->getLineCount() - 1);
context->paragraph->draw(surface, firstLine, lastLine);
}
EndPaint(hwnd, &ps);
return 0;
}
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDM_FILE_OPEN:
{
OPENFILENAMEA ofn;
char szFileName[MAX_PATH], szTitleName[MAX_PATH];
static char szFilter[] = "Text Files (.txt)\0*.txt\0"
"All Files (*.*)\0*.*\0\0";
ofn.lStructSize = sizeof (OPENFILENAMEA);
ofn.hwndOwner = hwnd;
ofn.hInstance = NULL;
ofn.lpstrFilter = szFilter;
ofn.lpstrCustomFilter = NULL;
ofn.nMaxCustFilter = 0;
ofn.nFilterIndex = 0;
ofn.lpstrFile = szFileName;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrFileTitle = szTitleName;
ofn.nMaxFileTitle = MAX_PATH;
ofn.lpstrInitialDir = NULL;
ofn.lpstrTitle = NULL;
ofn.Flags = OFN_HIDEREADONLY | OFN_PATHMUSTEXIST;
ofn.nFileOffset = 0;
ofn.nFileExtension = 0;
ofn.lpstrDefExt = "txt";
ofn.lCustData = 0L;
ofn.lpfnHook = NULL;
ofn.lpTemplateName = NULL;
szFileName[0] = '\0';
if (GetOpenFileNameA(&ofn)) {
hdc = GetDC(hwnd);
surface->setHDC(hdc);
Paragraph *newParagraph = Paragraph::paragraphFactory(szFileName, font, guiSupport);
if (newParagraph != NULL) {
context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
if (context->paragraph != NULL) {
delete context->paragraph;
}
context->paragraph = newParagraph;
InitParagraph(hwnd, context);
PrettyTitle(hwnd, szTitleName);
InvalidateRect(hwnd, NULL, TRUE);
}
}
//ReleaseDC(hwnd, hdc);
return 0;
}
case IDM_FILE_EXIT:
case IDM_FILE_CLOSE:
SendMessage(hwnd, WM_CLOSE, 0, 0);
return 0;
case IDM_HELP_ABOUTLAYOUTSAMPLE:
MessageBox(hwnd, TEXT("Windows Layout Sample 0.1\n")
TEXT("Copyright (C) 1998-2005 By International Business Machines Corporation and others.\n")
TEXT("Author: Eric Mader"),
szAppName, MB_ICONINFORMATION | MB_OK);
return 0;
}
break;
case WM_DESTROY:
{
context = (Context *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
if (context != NULL && context->paragraph != NULL) {
delete context->paragraph;
}
delete context;
if (--windowCount <= 0) {
delete font;
delete surface;
PostQuitMessage(0);
}
return 0;
}
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
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