moz_main.c.svn-base

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MozWinProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    pdfmoz_t *moz = (pdfmoz_t*) GetWindowLongPtr(hwnd, GWLP_USERDATA);
    char buf[256];

    int x = (signed short) LOWORD(lParam);
    int y = (signed short) HIWORD(lParam);
    int i, h;

    SCROLLINFO si;
    PAINTSTRUCT ps;
    HDC hdc;
    RECT rc;
    RECT pad;
    WORD sendmsg;
    float zoom;

    GetClientRect(hwnd, &rc);
    h = rc.bottom - rc.top;

    if (strlen(moz->error))
    {
	if (msg == WM_PAINT)
	{
	    hdc = BeginPaint(hwnd, &ps);
	    FillRect(hdc, &rc, GetStockBrush(WHITE_BRUSH));
	    rc.top += 10;
	    rc.bottom -= 10;
	    rc.left += 10;
	    rc.right -= 10;
	    DrawText(hdc, moz->error, strlen(moz->error), &rc, 0);
		// DT_SINGLELINE|DT_CENTER|DT_VCENTER);
	    EndPaint(hwnd, &ps);
	}
	if (msg == WM_MOUSEMOVE)
	{
	    SetCursor(moz->arrow);
	}
	return 0;
    }

    switch (msg)
    {

    case WM_PAINT:
	GetClientRect(moz->hwnd, &rc);

	si.cbSize = sizeof(si);
	si.fMask = SIF_ALL;
	GetScrollInfo(hwnd, SB_VERT, &si);

	decodescroll(moz, si.nPos);

	/* evict out-of-range images and pages */
	for (i = 0; i < moz->pagecount; i++)
	{
	    if (i < moz->scrollpage - 2 || i > moz->scrollpage + 6)
	    {
		if (moz->pages[i].page)
		{
		    pdf_droppage(moz->pages[i].page);
		    moz->pages[i].page = nil;
		}
	    }
	    if (i < moz->scrollpage - 1 || i > moz->scrollpage + 3)
	    {
		if (moz->pages[i].image)
		{
		    fz_droppixmap(moz->pages[i].image);
		    moz->pages[i].image = nil;
		}
	    }
	}

	i = moz->scrollpage;

	pdfmoz_loadpage(moz, i);
	if (moz->error[0]) return 0;

	pdfmoz_drawpage(moz, i);
	if (moz->error[0]) return 0;

	y = -moz->scrollyofs;
	while (y < h && i < moz->pagecount)
	{
	    pdfmoz_loadpage(moz, i);
	    if (moz->error[0]) return 0;
	    pdfmoz_drawpage(moz, i);
	    if (moz->error[0]) return 0;
	    y += moz->pages[i].image->h;
	    i ++;
	}

	hdc = BeginPaint(hwnd, &ps);

	pad.left = rc.left;
	pad.right = rc.right;

	i = moz->scrollpage;
	y = -moz->scrollyofs;
	while (y < h && i < moz->pagecount)
	{
	    drawimage(hdc, moz, moz->pages[i].image, y);
	    y += moz->pages[i].image->h;
	    i ++;

	    pad.top = y;
	    pad.bottom = y + PAD;
	    FillRect(hdc, &pad, moz->graybrush);
	    y += PAD;
	}

	if (y < h)
	{
	    pad.top = y;
	    pad.bottom = h;
	    FillRect(hdc, &pad, moz->graybrush);
	}

	EndPaint(hwnd, &ps);

	return 0;

    case WM_SIZE:
	ShowScrollBar(moz->hwnd, SB_VERT, TRUE);
	GetClientRect(moz->hwnd, &rc);

	si.cbSize = sizeof(si);
	si.fMask = SIF_POS | SIF_RANGE | SIF_PAGE;
	si.nPos = 0;
	si.nMin = 0;
	si.nMax = 0;
	// si.nPage = MAX(30, rc.bottom - rc.top - 30);
	si.nPage = rc.bottom - rc.top;

	for (i = 0; i < moz->pagecount; i++)
	{
	    zoom = (rc.right - rc.left) / (float) moz->pages[i].w;
	    moz->pages[i].px = zoom * moz->pages[i].h + PAD;

	    if (moz->scrollpage == i)
	    {
		si.nPos = si.nMax;
		if (moz->pages[i].image)
		{
		    si.nPos +=
			moz->pages[i].px *
			moz->scrollyofs /
			moz->pages[i].image->h + 1;
		}
	    }

	    if (moz->pages[i].image)
	    {
		fz_droppixmap(moz->pages[i].image);
		moz->pages[i].image = nil;
	    }

	    si.nMax += moz->pages[i].px;
	}

	si.nMax --;

	SetScrollInfo(moz->hwnd, SB_VERT, &si, TRUE);

	break;

    case WM_MOUSEMOVE:
	pdfmoz_onmouse(moz, x, y, 0);
	break;

    case WM_LBUTTONDOWN:
	SetFocus(hwnd);
	pdfmoz_onmouse(moz, x, y, 1);
	break;

    case WM_VSCROLL:

	si.cbSize = sizeof(si);
	si.fMask = SIF_ALL;
	GetScrollInfo(hwnd, SB_VERT, &si);

	switch (LOWORD(wParam))
	{
	case SB_BOTTOM: si.nPos = si.nMax; break;
	case SB_TOP: si.nPos = 0; break;
	case SB_LINEUP: si.nPos -= 50; break;
	case SB_LINEDOWN: si.nPos += 50; 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;
	case SB_THUMBPOSITION: si.nPos = si.nTrackPos; break;
	}

	si.fMask = SIF_POS;
	si.nPos = MAX(0, MIN(si.nPos, si.nMax));
	SetScrollInfo(hwnd, SB_VERT, &si, TRUE);

	InvalidateRect(moz->hwnd, NULL, FALSE);

	decodescroll(moz, si.nPos);
	sprintf(buf, "Page %d of %d", moz->scrollpage + 1, moz->pagecount);
	NPN_Status(moz->inst, buf);

	return 0;

    case WM_MOUSEWHEEL:
	if ((signed short)HIWORD(wParam) > 0)
	    SendMessage(hwnd, WM_VSCROLL, MAKELONG(SB_LINEUP, 0), 0);
	else
	    SendMessage(hwnd, WM_VSCROLL, MAKELONG(SB_LINEDOWN, 0), 0);
	break;

    case WM_KEYDOWN:
	sendmsg = 0xFFFF;

	switch (wParam)
	{
	case VK_UP: sendmsg = SB_LINEUP; break;
	case VK_PRIOR: sendmsg = SB_PAGEUP; break;
	case ' ':
	case VK_NEXT: sendmsg = SB_PAGEDOWN; break;
	case '\r':
	case VK_DOWN: sendmsg = SB_LINEDOWN; break;
	case VK_HOME: sendmsg = SB_TOP; break;
	case VK_END: sendmsg = SB_BOTTOM; break;
	}

	if (sendmsg != 0xFFFF)
	    SendMessage(hwnd, WM_VSCROLL, MAKELONG(sendmsg, 0), 0);

	/* ick! someone eats events instead of bubbling... not my fault! */

	break;

    default:
	break;

    }

    return moz->winproc(hwnd, msg, wParam, lParam);
}

NPError
NPP_New(NPMIMEType mime, NPP inst, uint16 mode,
	int16 argc, char *argn[], char *argv[], NPSavedData *saved)
{
    pdfmoz_t *moz;

    //MSG("NPP_New");

    moz = fz_malloc(sizeof(pdfmoz_t));
    if (!moz)
	return NPERR_OUT_OF_MEMORY_ERROR;

    memset(moz, 0, sizeof(pdfmoz_t));

    sprintf(moz->error, "MuPDF is loading the file...");

    moz->inst = inst;

    moz->arrow = LoadCursor(NULL, IDC_ARROW);
    moz->hand = LoadCursor(NULL, IDC_HAND);
    moz->wait = LoadCursor(NULL, IDC_WAIT);

    moz->dibinf = fz_malloc(sizeof(BITMAPINFO) + 12);
    if (!moz->dibinf)
	return NPERR_OUT_OF_MEMORY_ERROR;

    moz->dibinf->bmiHeader.biSize = sizeof(moz->dibinf->bmiHeader);
    moz->dibinf->bmiHeader.biPlanes = 1;
    moz->dibinf->bmiHeader.biBitCount = 24;
    moz->dibinf->bmiHeader.biCompression = BI_RGB;
    moz->dibinf->bmiHeader.biXPelsPerMeter = 2834;
    moz->dibinf->bmiHeader.biYPelsPerMeter = 2834;
    moz->dibinf->bmiHeader.biClrUsed = 0;
    moz->dibinf->bmiHeader.biClrImportant = 0;
    moz->dibinf->bmiHeader.biClrUsed = 0;

    moz->graybrush = CreateSolidBrush(RGB(0x70,0x70,0x70));

    inst->pdata = moz;

    return NPERR_NO_ERROR;
}

NPError
NPP_Destroy(NPP inst, NPSavedData **saved)
{
    pdfmoz_t *moz = inst->pdata;
    int i;

    //MSG("NPP_Destroy");

    inst->pdata = NULL;

    DeleteObject(moz->graybrush);

    DestroyCursor(moz->arrow);
    DestroyCursor(moz->hand);
    DestroyCursor(moz->wait);

    fz_free(moz->dibinf);

    for (i = 0; i < moz->pagecount; i++)
    {
	if (moz->pages[i].obj)
	    fz_dropobj(moz->pages[i].obj);
	if (moz->pages[i].page)
	    pdf_droppage(moz->pages[i].page);
	if (moz->pages[i].image)
	    fz_droppixmap(moz->pages[i].image);
    }

    fz_free(moz->pages);

    if (moz->xref)
    {
	if (moz->xref->store)
	{
	    pdf_dropstore(moz->xref->store);
	    moz->xref->store = nil;
	}

	pdf_closexref(moz->xref);
    }

    fz_free(moz);

    return NPERR_NO_ERROR;
}

NPError
NPP_SetWindow(NPP inst, NPWindow *npwin)
{
    pdfmoz_t *moz = inst->pdata;

    if (moz->hwnd != npwin->window)
    {
	moz->hwnd = npwin->window;
	SetWindowLongPtr(moz->hwnd, GWLP_USERDATA, (LONG_PTR)moz);
	moz->winproc = (WNDPROC)
	    SetWindowLongPtr(moz->hwnd, GWLP_WNDPROC, (LONG_PTR)MozWinProc);
    }

    SetFocus(moz->hwnd);

    return NPERR_NO_ERROR;
}

NPError
NPP_NewStream(NPP inst, NPMIMEType type,
	NPStream* stream, NPBool seekable,
	uint16* stype)
{
    //MSG("NPP_NewStream");
    *stype = NP_ASFILE;
    return NPERR_NO_ERROR;
}

NPError
NPP_DestroyStream(NPP inst, NPStream* stream, NPReason reason)
{
    //MSG("NPP_DestroyStream");
    return NPERR_NO_ERROR;
}

int32
NPP_WriteReady(NPP inst, NPStream* stream)
{
    //MSG("NPP_WriteReady");
    return 2147483647;
}

int32
NPP_Write(NPP inst, NPStream* stream, int32 offset, int32 len, void* buffer)
{
    //MSG("NPP_Write");
    return len;
}

void
NPP_StreamAsFile(NPP inst, NPStream* stream, const char* fname)
{
    pdfmoz_t *moz = inst->pdata;
    //MSG("NPP_StreamAsFile");
    pdfmoz_open(moz, (char*)fname);
}

void
NPP_Print(NPP inst, NPPrint* platformPrint)
{
    MSG("Sorry, printing is not supported.");
}

int16
NPP_HandleEvent(NPP inst, void* event)
{
    MSG("handle event\n");
    return 0;
}

void
NPP_URLNotify(NPP inst, const char* url,
	NPReason reason, void* notifyData)
{
    MSG("notify url\n");
}

NPError
NPP_GetValue(void* inst, NPPVariable variable, void *value)
{
    return NPERR_NO_ERROR;
}

NPError
NPP_SetValue(void* inst, NPNVariable variable, void *value)
{
    return NPERR_NO_ERROR;
}

void* NPP_GetJavaClass(void)
{
    return 0;
}

NPError
NPP_Initialize(void)
{
    //	MSG("NPP_Initialize");
    return NPERR_NO_ERROR;
}

void
NPP_Shutdown(void)
{
    //	MSG("NPP_Shutdown");
}