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lightning-sunbird  0.9+nobinonly
nsSVGNumber.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is the Mozilla SVG project.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Crocodile Clips Ltd..
00019  * Portions created by the Initial Developer are Copyright (C) 2002
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "nsSVGNumber.h"
00040 #include "nsTextFormatter.h"
00041 #include "prdtoa.h"
00042 #include "nsSVGValue.h"
00043 #include "nsISVGValueUtils.h"
00044 #include "nsContentUtils.h"
00045 
00047 // nsSVGNumber class
00048 
00049 class nsSVGNumber : public nsIDOMSVGNumber,
00050                     public nsSVGValue
00051 {
00052 protected:
00053   friend nsresult NS_NewSVGNumber(nsIDOMSVGNumber** result,
00054                                   float val);
00055   nsSVGNumber(float val);
00056   
00057 public:
00058   // nsISupports interface:
00059   NS_DECL_ISUPPORTS
00060 
00061   // nsIDOMSVGNumber interface:
00062   NS_DECL_NSIDOMSVGNUMBER
00063 
00064   // nsISVGValue interface:
00065   NS_IMETHOD SetValueString(const nsAString& aValue);
00066   NS_IMETHOD GetValueString(nsAString& aValue);
00067   
00068 protected:
00069   float mValue;
00070 };
00071 
00072 //----------------------------------------------------------------------
00073 // implementation:
00074 
00075 nsresult
00076 NS_NewSVGNumber(nsIDOMSVGNumber** result, float val)
00077 {
00078   *result = new nsSVGNumber(val);
00079   if (!*result) return NS_ERROR_OUT_OF_MEMORY;
00080   NS_ADDREF(*result);
00081   return NS_OK;
00082 }
00083 
00084 nsSVGNumber::nsSVGNumber(float val)
00085     : mValue(val)
00086 {
00087 }
00088 
00089 //----------------------------------------------------------------------
00090 // nsISupports methods:
00091 
00092 NS_IMPL_ADDREF(nsSVGNumber)
00093 NS_IMPL_RELEASE(nsSVGNumber)
00094 
00095 NS_INTERFACE_MAP_BEGIN(nsSVGNumber)
00096   NS_INTERFACE_MAP_ENTRY(nsISVGValue)
00097   NS_INTERFACE_MAP_ENTRY(nsIDOMSVGNumber)
00098   NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(SVGNumber)
00099   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsISVGValue)
00100 NS_INTERFACE_MAP_END
00101 
00102 //----------------------------------------------------------------------
00103 // nsISVGValue methods:
00104 
00105 NS_IMETHODIMP
00106 nsSVGNumber::GetValueString(nsAString& aValue)
00107 {
00108   aValue.Truncate();
00109 
00110   PRUnichar buf[24];
00111   nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(PRUnichar),
00112                             NS_LITERAL_STRING("%g").get(),
00113                             (double)mValue);
00114   aValue.Append(buf);
00115   
00116   return NS_OK;
00117 }
00118 
00119 NS_IMETHODIMP
00120 nsSVGNumber::SetValueString(const nsAString& aValue)
00121 {
00122   nsresult rv = NS_OK;
00123   WillModify();
00124   
00125   char *str = ToNewCString(aValue);
00126 
00127   if (*str) {
00128     char *rest;
00129     double value = PR_strtod(str, &rest);
00130     if (rest && rest!=str) {
00131       if (*rest=='%') {
00132         rv = SetValue(float(value/100.0));
00133         rest++;
00134       } else {
00135         rv = SetValue(float(value));
00136       }
00137       // skip trailing spaces
00138       while (*rest && isspace(*rest))
00139         ++rest;
00140 
00141       // check to see if there is trailing stuff...
00142       if (*rest != '\0') {
00143         rv = NS_ERROR_FAILURE;
00144         NS_ERROR("trailing data in number value");
00145       }
00146     } else {
00147       rv = NS_ERROR_FAILURE;
00148       // no number
00149     }
00150   }
00151   nsMemory::Free(str);
00152   DidModify();
00153   return rv;
00154 }
00155 
00156 //----------------------------------------------------------------------
00157 
00158 //----------------------------------------------------------------------
00159 // nsIDOMSVGNumber methods:
00160 
00161 /* attribute float value; */
00162 NS_IMETHODIMP nsSVGNumber::GetValue(float *aValue)
00163 {
00164   *aValue = mValue;
00165   return NS_OK;
00166 }
00167 NS_IMETHODIMP nsSVGNumber::SetValue(float aValue)
00168 {
00169   WillModify();
00170   mValue = aValue;
00171   DidModify();
00172   return NS_OK;
00173 }