/////////////////////////////////////////////////////////////////////////////
-// Name: helpchm.cpp
+// Name: src/msw/helpchm.cpp
// Purpose: Help system: MS HTML Help implementation
// Author: Julian Smart
// Modified by:
// Created: 16/04/2000
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "helpchm.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
-#ifndef WX_PRECOMP
-#include "wx/defs.h"
-#endif
+#if wxUSE_HELP && wxUSE_MS_HTML_HELP
#include "wx/filefn.h"
-
-#if wxUSE_HELP && wxUSE_MS_HTML_HELP && defined(__WIN95__)
#include "wx/msw/helpchm.h"
-#include "wx/dynlib.h"
+#include "wx/dynload.h"
#ifndef WX_PRECOMP
-#include <windows.h>
+ #include "wx/intl.h"
+ #include "wx/app.h"
#endif
-// This is found in the HTML Help Workshop installation,
-// along with htmlhelp.lib.
-#include <htmlhelp.h>
-
-#include <time.h>
-
-#ifdef __WXMSW__
#include "wx/msw/private.h"
-#endif
-
-#include <string.h>
+#include "wx/msw/htmlhelp.h"
+// ----------------------------------------------------------------------------
// utility functions to manage the loading/unloading
// of hhctrl.ocx
+// ----------------------------------------------------------------------------
+
#ifndef UNICODE
-typedef HWND ( WINAPI * HTMLHELP )( HWND, LPCSTR, UINT, DWORD );
-#define HTMLHELP_NAME "HtmlHelpA"
-#else
-typedef HWND ( WINAPI * HTMLHELP )( HWND, LPCWSTR, UINT, DWORD );
-#define HTMLHELP_NAME "HtmlHelpW"
+ typedef HWND ( WINAPI * HTMLHELP )( HWND, LPCSTR, UINT, DWORD );
+ #define HTMLHELP_NAME wxT("HtmlHelpA")
+#else // ANSI
+ typedef HWND ( WINAPI * HTMLHELP )( HWND, LPCWSTR, UINT, DWORD );
+ #define HTMLHELP_NAME wxT("HtmlHelpW")
#endif
-// dll handle/reference count
-static HTMLHELP gs_htmlHelp = 0;
-static wxDllType gs_dllHandle = 0;
-static int gs_dllCount = 0;
-static bool LoadHtmlHelpLibrary()
+HTMLHELP GetHtmlHelpFunction()
{
- if( !gs_dllCount )
+ static HTMLHELP s_htmlHelp = NULL;
+
+ if ( !s_htmlHelp )
{
- gs_dllHandle = wxDllLoader::LoadLibrary( "hhctrl.ocx" );
- if( !gs_dllHandle )
+ static wxDynamicLibrary s_dllHtmlHelp(_T("HHCTRL.OCX"), wxDL_VERBATIM);
+
+ if ( !s_dllHtmlHelp.IsLoaded() )
{
wxLogError(_("MS HTML Help functions are unavailable because the MS HTML Help library is not installed on this machine. Please install it."));
- return FALSE;
}
else
{
- gs_dllCount = 1;
- gs_htmlHelp = (HTMLHELP)wxDllLoader::GetSymbol( gs_dllHandle, HTMLHELP_NAME );
-
- if( !gs_htmlHelp )
+ s_htmlHelp = (HTMLHELP)s_dllHtmlHelp.GetSymbol(HTMLHELP_NAME);
+ if ( !s_htmlHelp )
{
wxLogError(_("Failed to initialize MS HTML Help."));
-
- wxDllLoader::UnloadLibrary(gs_dllHandle);
- gs_dllHandle = 0;
- gs_dllCount = 0;
-
- return FALSE ;
}
}
}
- else
- {
- ++gs_dllCount;
- }
- return TRUE;
+ return s_htmlHelp;
}
-static void UnloadHtmlHelpLibrary()
+// find the window to use in HtmlHelp() call: use the given one by default but
+// fall back to the top level app window and then the desktop if it's NULL
+static HWND GetSuitableHWND(wxWindow *win)
{
- if( gs_dllCount != 0 && !--gs_dllCount )
- {
- wxDllLoader::UnloadLibrary( gs_dllHandle );
- gs_dllHandle = 0;
- gs_htmlHelp = 0;
- }
+ if ( !win && wxTheApp )
+ win = wxTheApp->GetTopWindow();
+
+ return win ? GetHwndOf(win) : ::GetDesktopWindow();
}
-static HWND GetSuitableHWND()
+// wrap the real HtmlHelp() but just return false (and not crash) if it
+// couldn't be loaded
+//
+// it also takes a wxWindow instead of HWND
+static bool
+CallHtmlHelpFunction(wxWindow *win, const wxChar *str, UINT uint, DWORD dword)
{
- if (wxTheApp->GetTopWindow())
- return (HWND) wxTheApp->GetTopWindow()->GetHWND();
- else
- return GetDesktopWindow();
+ HTMLHELP htmlHelp = GetHtmlHelpFunction();
+
+ return htmlHelp && htmlHelp(GetSuitableHWND(win), str, uint, dword);
}
IMPLEMENT_DYNAMIC_CLASS(wxCHMHelpController, wxHelpControllerBase)
bool wxCHMHelpController::Initialize(const wxString& filename)
{
- // warn on failure
- if( !LoadHtmlHelpLibrary() )
- return FALSE;
+ if ( !GetHtmlHelpFunction() )
+ return false;
m_helpFile = filename;
- return TRUE;
+ return true;
}
bool wxCHMHelpController::LoadFile(const wxString& file)
{
if (!file.IsEmpty())
m_helpFile = file;
- return TRUE;
+ return true;
}
bool wxCHMHelpController::DisplayContents()
{
- if (m_helpFile.IsEmpty()) return FALSE;
+ if (m_helpFile.IsEmpty())
+ return false;
wxString str = GetValidFilename(m_helpFile);
- gs_htmlHelp(GetSuitableHWND(), (const wxChar*) str, HH_HELP_FINDER, 0L);
- return TRUE;
+ return CallHtmlHelpFunction(GetParentWindow(), str, HH_DISPLAY_TOPIC, 0L);
}
// Use topic or HTML filename
bool wxCHMHelpController::DisplaySection(const wxString& section)
{
- if (m_helpFile.IsEmpty()) return FALSE;
+ if (m_helpFile.IsEmpty())
+ return false;
wxString str = GetValidFilename(m_helpFile);
// Is this an HTML file or a keyword?
- bool isFilename = (section.Find(wxT(".htm")) != -1);
+ if ( section.Find(wxT(".htm")) != wxNOT_FOUND )
+ {
+ // interpret as a file name
+ return CallHtmlHelpFunction(GetParentWindow(), str, HH_DISPLAY_TOPIC,
+ wxPtrToUInt(section.c_str()));
+ }
- if (isFilename)
- gs_htmlHelp(GetSuitableHWND(), (const wxChar*) str, HH_DISPLAY_TOPIC, (DWORD) (const wxChar*) section);
- else
- KeywordSearch(section);
- return TRUE;
+ return KeywordSearch(section);
}
// Use context number
bool wxCHMHelpController::DisplaySection(int section)
{
- if (m_helpFile.IsEmpty()) return FALSE;
+ if (m_helpFile.IsEmpty())
+ return false;
wxString str = GetValidFilename(m_helpFile);
- gs_htmlHelp(GetSuitableHWND(), (const wxChar*) str, HH_HELP_CONTEXT, (DWORD)section);
- return TRUE;
+ return CallHtmlHelpFunction(GetParentWindow(), str, HH_HELP_CONTEXT,
+ (DWORD)section);
}
bool wxCHMHelpController::DisplayContextPopup(int contextId)
{
- if (m_helpFile.IsEmpty()) return FALSE;
+ if (m_helpFile.IsEmpty()) return false;
wxString str = GetValidFilename(m_helpFile);
popup.pszFont = NULL;
popup.pszText = NULL;
- gs_htmlHelp(GetSuitableHWND(), (const wxChar*) str, HH_DISPLAY_TEXT_POPUP, (DWORD) & popup);
- return TRUE;
+ return CallHtmlHelpFunction(GetParentWindow(), str, HH_DISPLAY_TEXT_POPUP,
+ wxPtrToUInt(&popup));
}
-bool wxCHMHelpController::DisplayTextPopup(const wxString& text, const wxPoint& pos)
+bool
+wxCHMHelpController::DisplayTextPopup(const wxString& text, const wxPoint& pos)
+{
+ return ShowContextHelpPopup(text, pos, GetParentWindow());
+}
+
+/* static */
+bool wxCHMHelpController::ShowContextHelpPopup(const wxString& text,
+ const wxPoint& pos,
+ wxWindow *window)
{
HH_POPUP popup;
popup.cbStruct = sizeof(popup);
popup.pszFont = NULL;
popup.pszText = (const wxChar*) text;
- gs_htmlHelp(GetSuitableHWND(), NULL, HH_DISPLAY_TEXT_POPUP, (DWORD) & popup);
- return TRUE;
+ return CallHtmlHelpFunction(window, NULL, HH_DISPLAY_TEXT_POPUP,
+ wxPtrToUInt(&popup));
}
bool wxCHMHelpController::DisplayBlock(long block)
return DisplaySection(block);
}
-bool wxCHMHelpController::KeywordSearch(const wxString& k)
+bool wxCHMHelpController::KeywordSearch(const wxString& k,
+ wxHelpSearchMode WXUNUSED(mode))
{
- if (m_helpFile.IsEmpty()) return FALSE;
+ if (m_helpFile.IsEmpty())
+ return false;
wxString str = GetValidFilename(m_helpFile);
link.pszWindow = NULL ;
link.fIndexOnFail = TRUE ;
- gs_htmlHelp(GetSuitableHWND(), (const wxChar*) str, HH_KEYWORD_LOOKUP, (DWORD)& link);
- return TRUE;
+ return CallHtmlHelpFunction(GetParentWindow(), str, HH_KEYWORD_LOOKUP,
+ wxPtrToUInt(&link));
}
bool wxCHMHelpController::Quit()
{
- gs_htmlHelp(GetSuitableHWND(), 0, HH_CLOSE_ALL, 0L);
- UnloadHtmlHelpLibrary();
-
- return TRUE;
+ return CallHtmlHelpFunction(GetParentWindow(), NULL, HH_CLOSE_ALL, 0L);
}
// Append extension if necessary.
projects / wxWidgets.git / blobdiff