no real changes, just refactor/simplify the code to remove duplication and unnecessary casts

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52214 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/helpchm.h

@@ -9,8 +9,8 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifndef _WX_HELPCHM_H_
-#define _WX_HELPCHM_H_
+#ifndef _WX_MSW_HELPCHM_H_
+#define _WX_MSW_HELPCHM_H_
 
 #if wxUSE_MS_HTML_HELP
 
@@ -45,10 +45,41 @@ public:
                                      wxWindow *window);
 
 protected:
-    // Append extension if necessary.
-    wxString GetValidFilename(const wxString& file) const;
+    // get the name of the CHM file we use from our m_helpFile
+    wxString GetValidFilename() const;
+
+    // Call HtmlHelp() with the provided parameters (both overloads do the same
+    // thing but allow to avoid casts in the calling code) and return false
+    // (but don't crash) if HTML help is unavailable
+    static bool CallHtmlHelp(wxWindow *win, const wxChar *str,
+                             unsigned cmd, WXWPARAM param);
+    static bool CallHtmlHelp(wxWindow *win, const wxChar *str,
+                             unsigned cmd, const void *param = NULL)
+    {
+        return CallHtmlHelp(win, str, cmd, wx_reinterpret_cast(WPARAM, param));
+    }
+
+    // even simpler wrappers using GetParentWindow() and GetValidFilename() as
+    // the first 2 HtmlHelp() parameters
+    bool CallHtmlHelp(unsigned cmd, WXWPARAM param)
+    {
+        return CallHtmlHelp(GetParentWindow(), GetValidFilename().wx_str(),
+                            cmd, param);
+    }
+
+    bool CallHtmlHelp(unsigned cmd, const void *param = NULL)
+    {
+        return CallHtmlHelp(cmd, wx_reinterpret_cast(WXWPARAM, param));
+    }
+
+    // wrapper around CallHtmlHelp(HH_DISPLAY_TEXT_POPUP): only one of text and
+    // contextId parameters can be non-NULL/non-zero
+    static bool DoDisplayTextPopup(const wxChar *text,
+                                   const wxPoint& pos,
+                                   int contextId,
+                                   wxWindow *window);
+
 
-protected:
     wxString m_helpFile;
 
     DECLARE_CLASS(wxCHMHelpController)
@@ -56,5 +87,4 @@ protected:
 
 #endif // wxUSE_MS_HTML_HELP
 
-#endif
-// _WX_HELPCHM_H_
+#endif // _WX_MSW_HELPCHM_H_