winhelp.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

                        DeleteObject(hBitmap);
                    }
                    break;
                }
            }
        }

        EndPaint(hWnd, &ps);
        break;

    case WM_MOUSEMOVE:
        win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);

        if (WINHELP_IsOverLink(win, wParam, lParam))
            SetCursor(win->hHandCur); /* set to hand pointer cursor to indicate a link */
        else
            SetCursor(win->hArrowCur); /* set to hand pointer cursor to indicate a link */

        break;

    case WM_LBUTTONDOWN:
        win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);

        hPopupWnd = Globals.hPopupWnd;
        Globals.hPopupWnd = 0;

        part = WINHELP_IsOverLink(win, wParam, lParam);
        if (part)
        {
            HLPFILE*            hlpfile;
            HLPFILE_WINDOWINFO* wi;

            mouse.x = (short)LOWORD(lParam);
            mouse.y = (short)HIWORD(lParam);

            if (part->link) switch (part->link->cookie)
            {
            case hlp_link_link:
                hlpfile = WINHELP_LookupHelpFile(part->link->lpszString);
                if (part->link->window == -1)
                    wi = win->info;
                else if ((part->link->window >= 0) && (part->link->window < hlpfile->numWindows))
                    wi = &hlpfile->windows[part->link->window];
                else
                {
                    WINE_WARN("link to window %d/%d\n", part->link->window, hlpfile->numWindows);
                    break;
                }
                WINHELP_CreateHelpWindowByHash(hlpfile, part->link->lHash, wi,
                                               SW_NORMAL);
                break;
            case hlp_link_popup:
                hlpfile = WINHELP_LookupHelpFile(part->link->lpszString);
                if (hlpfile) WINHELP_CreateHelpWindowByHash(hlpfile, part->link->lHash, 
                                               WINHELP_GetPopupWindowInfo(hlpfile, hWnd, &mouse),
                                               SW_NORMAL);
                break;
            case hlp_link_macro:
                MACRO_ExecuteMacro(part->link->lpszString);
                break;
            default:
                WINE_FIXME("Unknown link cookie %d\n", part->link->cookie);
            }
        }

        if (hPopupWnd)
            DestroyWindow(hPopupWnd);
        break;

    case WM_NCDESTROY:
        win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);

        if (hWnd == Globals.hPopupWnd) Globals.hPopupWnd = 0;

        bExit = (Globals.wVersion >= 4 && !lstrcmpi(win->lpszName, "main"));
        DeleteObject(win->hBrush);

        WINHELP_DeleteWindow(win);

        if (bExit) MACRO_Exit();

        if (!Globals.win_list)
            PostQuitMessage(0);
        break;
    }

    return DefWindowProc(hWnd, msg, wParam, lParam);
}

/******************************************************************
 *		WINHELP_HistoryWndProc
 *
 *
 */
static LRESULT CALLBACK WINHELP_HistoryWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    WINHELP_WINDOW*     win;
    PAINTSTRUCT         ps;
    HDC                 hDc;
    TEXTMETRIC          tm;
    unsigned int        i;
    RECT                r;

    switch (msg)
    {
    case WM_NCCREATE:
        win = (WINHELP_WINDOW*)((LPCREATESTRUCT)lParam)->lpCreateParams;
        SetWindowLong(hWnd, 0, (LONG)win);
        win->hHistoryWnd = hWnd;
        break;
    case WM_CREATE:
        win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);
        hDc = GetDC(hWnd);
        GetTextMetrics(hDc, &tm);
        GetWindowRect(hWnd, &r);

        r.right = r.left + 30 * tm.tmAveCharWidth;
        r.bottom = r.top + (sizeof(win->history) / sizeof(win->history[0])) * tm.tmHeight;
        AdjustWindowRect(&r, GetWindowLong(hWnd, GWL_STYLE), FALSE);
        if (r.left < 0) {r.right -= r.left; r.left = 0;}
        if (r.top < 0) {r.bottom -= r.top; r.top = 0;}

        MoveWindow(hWnd, r.left, r.top, r.right, r.bottom, TRUE);
        ReleaseDC(hWnd, hDc);
        break;
    case WM_LBUTTONDOWN:
        win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);
        hDc = GetDC(hWnd);
        GetTextMetrics(hDc, &tm);
        i = HIWORD(lParam) / tm.tmHeight;
        if (i < win->histIndex)
            WINHELP_CreateHelpWindow(win->history[i], win->info, SW_SHOW);
        ReleaseDC(hWnd, hDc);
        break;
    case WM_PAINT:
        hDc = BeginPaint(hWnd, &ps);
        win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);
        GetTextMetrics(hDc, &tm);

        for (i = 0; i < win->histIndex; i++)
        {
            TextOut(hDc, 0, i * tm.tmHeight, win->history[i]->lpszTitle, 
                    strlen(win->history[i]->lpszTitle));
        }
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY:
        win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);
        if (hWnd == win->hHistoryWnd)
            win->hHistoryWnd = 0;
        break;
    }
    return DefWindowProc(hWnd, msg, wParam, lParam);
}

/***********************************************************************
 *
 *           WINHELP_ShadowWndProc
 */
static LRESULT CALLBACK WINHELP_ShadowWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    WINHELP_CheckPopup(msg);
    return DefWindowProc(hWnd, msg, wParam, lParam);
}

/***********************************************************************
 *
 *           SetupText
 */
static void WINHELP_SetupText(HWND hWnd)
{
    HDC  hDc = GetDC(hWnd);
    RECT rect;
    SIZE newsize;

    ShowScrollBar(hWnd, SB_VERT, FALSE);
    if (!WINHELP_SplitLines(hWnd, NULL))
    {
        ShowScrollBar(hWnd, SB_VERT, TRUE);
        GetClientRect(hWnd, &rect);

        WINHELP_SplitLines(hWnd, &newsize);
        SetScrollRange(hWnd, SB_VERT, 0, rect.top + newsize.cy - rect.bottom, TRUE);
    }
    else
    {
        SetScrollPos(hWnd, SB_VERT, 0, FALSE);
        SetScrollRange(hWnd, SB_VERT, 0, 0, FALSE);
    }

    ReleaseDC(hWnd, hDc);
}

/***********************************************************************
 *
 *           WINHELP_AppendText
 */
static BOOL WINHELP_AppendText(WINHELP_LINE ***linep, WINHELP_LINE_PART ***partp,
			       LPSIZE space, LPSIZE textsize,
			       INT *line_ascent, INT ascent,
			       LPCSTR text, UINT textlen,
			       HFONT font, COLORREF color, HLPFILE_LINK *link,
                               unsigned underline)
{
    WINHELP_LINE      *line;
    WINHELP_LINE_PART *part;
    LPSTR ptr;

    if (!*partp) /* New line */
    {
        *line_ascent  = ascent;

        line = HeapAlloc(GetProcessHeap(), 0,
                         sizeof(WINHELP_LINE) + textlen);
        if (!line) return FALSE;

        line->next    = 0;
        part          = &line->first_part;
        ptr           = (char*)line + sizeof(WINHELP_LINE);

        line->rect.top    = (**linep ? (**linep)->rect.bottom : 0) + space->cy;
        line->rect.bottom = line->rect.top;
        line->rect.left   = space->cx;
        line->rect.right  = space->cx;

        if (**linep) *linep = &(**linep)->next;
        **linep = line;
        space->cy = 0;
    }
    else /* Same line */
    {
        line = **linep;

        if (*line_ascent < ascent)
	{
            WINHELP_LINE_PART *p;
            for (p = &line->first_part; p; p = p->next)
	    {
                p->rect.top    += ascent - *line_ascent;
                p->rect.bottom += ascent - *line_ascent;
	    }
            line->rect.bottom += ascent - *line_ascent;
            *line_ascent = ascent;
	}

        part = HeapAlloc(GetProcessHeap(), 0,
                         sizeof(WINHELP_LINE_PART) + textlen);
        if (!part) return FALSE;
        **partp = part;
        ptr     = (char*)part + sizeof(WINHELP_LINE_PART);
    }

    memcpy(ptr, text, textlen);
    part->cookie            = hlp_line_part_text;
    part->rect.left         = line->rect.right + (*partp ? space->cx : 0);
    part->rect.right        = part->rect.left + textsize->cx;
    line->rect.right        = part->rect.right;
    part->rect.top          =
        ((*partp) ? line->rect.top : line->rect.bottom) + *line_ascent - ascent;
    part->rect.bottom       = part->rect.top + textsize->cy;
    line->rect.bottom       = max(line->rect.bottom, part->rect.bottom);
    part->u.text.lpsText    = ptr;
    part->u.text.wTextLen   = textlen;
    part->u.text.hFont      = font;
    part->u.text.color      = color;
    part->u.text.wUnderline = underline;

    WINE_TRACE("Appended text '%*.*s'[%d] @ (%d,%d-%d,%d)\n",
               part->u.text.wTextLen,
               part->u.text.wTextLen,
               part->u.text.lpsText,
               part->u.text.wTextLen,
               part->rect.left, part->rect.top, part->rect.right, part->rect.bottom);

    part->link = link;
    if (link) link->wRefCount++;

    part->next          = 0;
    *partp              = &part->next;

    space->cx = 0;

    return TRUE;
}

/***********************************************************************
 *
 *           WINHELP_AppendGfxObject
 */
static WINHELP_LINE_PART* WINHELP_AppendGfxObject(WINHELP_LINE ***linep, WINHELP_LINE_PART ***partp,
                                                  LPSIZE space, LPSIZE gfxSize,
                                                  HLPFILE_LINK *link, unsigned pos)
{
    WINHELP_LINE      *line;
    WINHELP_LINE_PART *part;
    LPSTR              ptr;

    if (!*partp || pos == 1) /* New line */
    {
        line = HeapAlloc(GetProcessHeap(), 0, sizeof(WINHELP_LINE));
        if (!line) return NULL;

        line->next    = NULL;
        part          = &line->first_part;

        line->rect.top    = (**linep ? (**linep)->rect.bottom : 0) + space->cy;
        line->rect.bottom = line->rect.top;
        line->rect.left   = space->cx;
        line->rect.right  = space->cx;

        if (**linep) *linep = &(**linep)->next;
        **linep = line;
        space->cy = 0;
        ptr = (char*)line + sizeof(WINHELP_LINE);
    }
    else /* Same line */
    {
        if (pos == 2) WINE_FIXME("Left alignment not handled\n");
        line = **linep;

        part = HeapAlloc(GetProcessHeap(), 0, sizeof(WINHELP_LINE_PART));
        if (!part) return NULL;
        **partp = part;
        ptr = (char*)part + sizeof(WINHELP_LINE_PART);
    }

    /* part->cookie should be set by caller (image or metafile) */
    part->rect.left       = line->rect.right + (*partp ? space->cx : 0);
    part->rect.right      = part->rect.left + gfxSize->cx;
    line->rect.right      = part->rect.right;
    part->rect.top        = (*partp) ? line->rect.top : line->rect.bottom;
    part->rect.bottom     = part->rect.top + gfxSize->cy;
    line->rect.bottom     = max(line->rect.bottom, part->rect.bottom);

    WINE_TRACE("Appended gfx @ (%d,%d-%d,%d)\n",
               part->rect.left, part->rect.top, part->rect.right, part->rect.bottom);

    part->link = link;
    if (link) link->wRefCount++;

    part->next            = NULL;
    *partp                = &part->next;

    space->cx = 0;

    return part;
}


/***********************************************************************
 *
 *           WINHELP_SplitLines
 */
static BOOL WINHELP_SplitLines(HWND hWnd, LPSIZE newsize)
{
    WINHELP_WINDOW     *win = (WINHELP_WINDOW*) GetWindowLong(hWnd, 0);
    HLPFILE_PARAGRAPH  *p;
    WINHELP_LINE      **line = &win->first_line;
    WINHELP_LINE_PART **part = 0;
    INT                 line_ascent = 0;
    SIZE                space;
    RECT                rect;
    HDC                 hDc;

    if (newsize) newsize->cx = newsize->cy = 0;

    if (!win->page) return TRUE;

    WINHELP_DeleteLines(win);

    GetClientRect(hWnd, &rect);

    rect.top    += INTERNAL_BORDER_WIDTH;
    rect.left   += INTERNAL_BORDER_WIDTH;
    rect.right  -= INTERNAL_BORDER_WIDTH;
    rect.bottom -= INTERNAL_BORDER_WIDTH;

    space.cy = rect.top;
    space.cx = rect.left;

    hDc = GetDC(hWnd);

    for (p = win->page->first_paragraph; p; p = p->next)
    {
        switch (p->cookie)
        {
        case para_normal_text: