bug 78273, r=ftang/jbetak, sr=blizzard

for the embedding API add "get font list". Used to fill the font pref panel

gfx/src/nsFontList.cpp

@@ -0,0 +1,161 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Mozilla Communicator client code,
+ * released March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are
+ * Copyright (C) 2001 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ *     Brian Stell <bstell@netscape.com>
+ */
+
+/*
+ * Implementation of nsIFontList
+ */
+
+#include "nsCOMPtr.h"
+#include "nsFontList.h"
+#include "nsGfxCIID.h"
+#include "nsLocalString.h"
+#include "nsIFontEnumerator.h"
+#include "nsISimpleEnumerator.h"
+#include "nsISupportsPrimitives.h"
+#include "nsMemory.h"
+#include "nsReadableUtils.h"
+#include "nsXPIDLString.h"
+
+static NS_DEFINE_IID(kCFontEnumerator, NS_FONT_ENUMERATOR_CID);
+
+nsFontList::nsFontList()
+{
+    NS_INIT_REFCNT();
+}
+
+nsFontList::~nsFontList()
+{
+}
+
+NS_IMPL_ISUPPORTS1(nsFontList,nsIFontList)
+
+/* font list enumerator */
+class
+nsFontListEnumerator : public nsISimpleEnumerator
+{
+  public:
+    nsFontListEnumerator();
+    virtual ~nsFontListEnumerator();
+
+    // nsISupports interface
+    NS_DECL_ISUPPORTS
+
+    // nsISimpleEnumerator interface
+    NS_DECL_NSISIMPLEENUMERATOR
+
+    NS_IMETHOD Init(const PRUnichar *aLangGroup, const PRUnichar *aFontType);
+
+
+  protected:
+    PRUnichar **mFonts;
+    PRUint32 mCount;
+    PRUint32 mIndex;
+};
+
+nsFontListEnumerator::nsFontListEnumerator() :
+  mFonts(nsnull), mCount(0), mIndex(0)
+{
+    NS_INIT_REFCNT();
+}
+
+nsFontListEnumerator::~nsFontListEnumerator()
+{
+  if (mFonts) {
+    PRUint32 i;
+    for (i=0; i<mCount; i++) {
+      nsMemory::Free(mFonts[i]);
+    }
+    nsMemory::Free(mFonts);
+  }
+}
+
+NS_IMPL_ISUPPORTS1(nsFontListEnumerator, nsISimpleEnumerator)
+
+NS_IMETHODIMP
+nsFontListEnumerator::Init(const PRUnichar *aLangGroup, 
+                           const PRUnichar *aFontType)
+{
+  nsresult rv;
+  nsCOMPtr<nsIFontEnumerator> fontEnumerator;
+
+  fontEnumerator = do_CreateInstance(kCFontEnumerator, &rv);
+  if (NS_FAILED(rv))
+    return rv;
+ 
+  nsXPIDLCString langGroup;
+  langGroup = ToNewUTF8String(nsLocalString(aLangGroup));
+  nsXPIDLCString fontType;
+  fontType = ToNewUTF8String(nsLocalString(aFontType));
+  rv = fontEnumerator->EnumerateFonts(langGroup.get(), fontType.get(), 
+                                        &mCount, &mFonts);
+  return rv;
+}
+
+NS_IMETHODIMP
+nsFontListEnumerator::HasMoreElements(PRBool *result)
+{
+  *result = (mIndex < mCount);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsFontListEnumerator::GetNext(nsISupports **aFont)
+{
+  NS_ENSURE_ARG_POINTER(aFont);
+  *aFont = nsnull;
+  if (mIndex >= mCount) {
+    return NS_ERROR_UNEXPECTED;
+  }
+  PRUnichar *fontName = mFonts[mIndex++];
+  nsCOMPtr<nsISupportsWString> fontNameWrapper;
+  nsresult rv;
+  rv = nsComponentManager::CreateInstance(NS_SUPPORTS_WSTRING_CONTRACTID, nsnull, 
+                    NS_GET_IID(nsISupportsWString), getter_AddRefs(fontNameWrapper));
+  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_TRUE(fontNameWrapper, NS_ERROR_OUT_OF_MEMORY);
+  fontNameWrapper->SetData(NS_CONST_CAST(PRUnichar*, fontName));
+  *aFont = NS_STATIC_CAST(nsISupports*, fontNameWrapper);
+  NS_ADDREF(*aFont);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsFontList::AvailableFonts(const PRUnichar *aLangGroup, 
+                           const PRUnichar *aFontType, 
+                           nsISimpleEnumerator **aFontEnumerator)
+{
+  NS_ENSURE_ARG(aLangGroup);
+  NS_ENSURE_ARG(aFontType);
+  NS_ENSURE_ARG_POINTER(aFontEnumerator);
+  nsCOMPtr<nsFontListEnumerator> fontListEnum = new nsFontListEnumerator();
+  NS_ENSURE_TRUE(fontListEnum.get(), NS_ERROR_OUT_OF_MEMORY);
+
+  nsresult rv = fontListEnum->Init(aLangGroup, aFontType);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  *aFontEnumerator = NS_STATIC_CAST(nsISimpleEnumerator*, fontListEnum);
+  NS_ADDREF(*aFontEnumerator);
+  return NS_OK;
+}
+

gfx/src/nsFontList.h

@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Mozilla Communicator client code, 
+ * released March 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications 
+ * Corporation.  Portions created by Netscape are
+ * Copyright (C) 2001 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ *     Brian Stell <bstell@netscape.com>
+ */
+
+/*
+ * Implementation of nsIFontList
+ */
+
+#ifndef _nsFontList_H_
+#define _nsFontList_H_
+
+#include "nsIFontList.h"
+
+#define NS_FONTLIST_CONTRACTID "@mozilla.org/gfx/fontlist;1"
+
+
+class nsFontList : public nsIFontList
+{
+public:
+  NS_DEFINE_STATIC_CID_ACCESSOR(NS_IFONTLIST_IID)
+    
+  nsFontList();
+  virtual ~nsFontList();
+
+  // nsISupports
+  NS_DECL_ISUPPORTS
+
+  // nsIFontList
+  NS_DECL_NSIFONTLIST
+
+protected:
+
+};
+
+#endif /* _nsFontList_H_ */