1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/xpwidgets/nsHTMLFormatConverter.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,255 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsHTMLFormatConverter.h"
1.10 +
1.11 +#include "nsCRT.h"
1.12 +#include "nsISupportsArray.h"
1.13 +#include "nsIComponentManager.h"
1.14 +#include "nsCOMPtr.h"
1.15 +#include "nsXPCOM.h"
1.16 +#include "nsISupportsPrimitives.h"
1.17 +
1.18 +#include "nsITransferable.h" // for mime defs, this is BAD
1.19 +
1.20 +// HTML convertor stuff
1.21 +#include "nsPrimitiveHelpers.h"
1.22 +#include "nsIDocumentEncoder.h"
1.23 +#include "nsContentUtils.h"
1.24 +
1.25 +nsHTMLFormatConverter::nsHTMLFormatConverter()
1.26 +{
1.27 +}
1.28 +
1.29 +nsHTMLFormatConverter::~nsHTMLFormatConverter()
1.30 +{
1.31 +}
1.32 +
1.33 +NS_IMPL_ISUPPORTS(nsHTMLFormatConverter, nsIFormatConverter)
1.34 +
1.35 +//
1.36 +// GetInputDataFlavors
1.37 +//
1.38 +// Creates a new list and returns the list of all the flavors this converter
1.39 +// knows how to import. In this case, it's just HTML.
1.40 +//
1.41 +// Flavors (strings) are wrapped in a primitive object so that JavaScript can
1.42 +// access them easily via XPConnect.
1.43 +//
1.44 +NS_IMETHODIMP
1.45 +nsHTMLFormatConverter::GetInputDataFlavors(nsISupportsArray **_retval)
1.46 +{
1.47 + if ( !_retval )
1.48 + return NS_ERROR_INVALID_ARG;
1.49 +
1.50 + nsresult rv = NS_NewISupportsArray ( _retval ); // addrefs for us
1.51 + if ( NS_SUCCEEDED(rv) )
1.52 + rv = AddFlavorToList ( *_retval, kHTMLMime );
1.53 +
1.54 + return rv;
1.55 +
1.56 +} // GetInputDataFlavors
1.57 +
1.58 +
1.59 +//
1.60 +// GetOutputDataFlavors
1.61 +//
1.62 +// Creates a new list and returns the list of all the flavors this converter
1.63 +// knows how to export (convert). In this case, it's all sorts of things that HTML can be
1.64 +// converted to.
1.65 +//
1.66 +// Flavors (strings) are wrapped in a primitive object so that JavaScript can
1.67 +// access them easily via XPConnect.
1.68 +//
1.69 +NS_IMETHODIMP
1.70 +nsHTMLFormatConverter::GetOutputDataFlavors(nsISupportsArray **_retval)
1.71 +{
1.72 + if ( !_retval )
1.73 + return NS_ERROR_INVALID_ARG;
1.74 +
1.75 + nsresult rv = NS_NewISupportsArray ( _retval ); // addrefs for us
1.76 + if ( NS_SUCCEEDED(rv) ) {
1.77 + rv = AddFlavorToList ( *_retval, kHTMLMime );
1.78 + if ( NS_FAILED(rv) )
1.79 + return rv;
1.80 +#if NOT_NOW
1.81 +// pinkerton
1.82 +// no one uses this flavor right now, so it's just slowing things down. If anyone cares I
1.83 +// can put it back in.
1.84 + rv = AddFlavorToList ( *_retval, kAOLMailMime );
1.85 + if ( NS_FAILED(rv) )
1.86 + return rv;
1.87 +#endif
1.88 + rv = AddFlavorToList ( *_retval, kUnicodeMime );
1.89 + if ( NS_FAILED(rv) )
1.90 + return rv;
1.91 + }
1.92 + return rv;
1.93 +
1.94 +} // GetOutputDataFlavors
1.95 +
1.96 +
1.97 +//
1.98 +// AddFlavorToList
1.99 +//
1.100 +// Convenience routine for adding a flavor wrapped in an nsISupportsCString object
1.101 +// to a list
1.102 +//
1.103 +nsresult
1.104 +nsHTMLFormatConverter :: AddFlavorToList ( nsISupportsArray* inList, const char* inFlavor )
1.105 +{
1.106 + nsresult rv;
1.107 +
1.108 + nsCOMPtr<nsISupportsCString> dataFlavor =
1.109 + do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
1.110 + if ( dataFlavor ) {
1.111 + dataFlavor->SetData ( nsDependentCString(inFlavor) );
1.112 + // add to list as an nsISupports so the correct interface gets the addref
1.113 + // in AppendElement()
1.114 + nsCOMPtr<nsISupports> genericFlavor ( do_QueryInterface(dataFlavor) );
1.115 + inList->AppendElement ( genericFlavor);
1.116 + }
1.117 + return rv;
1.118 +
1.119 +} // AddFlavorToList
1.120 +
1.121 +
1.122 +//
1.123 +// CanConvert
1.124 +//
1.125 +// Determines if we support the given conversion. Currently, this method only
1.126 +// converts from HTML to others.
1.127 +//
1.128 +NS_IMETHODIMP
1.129 +nsHTMLFormatConverter::CanConvert(const char *aFromDataFlavor, const char *aToDataFlavor, bool *_retval)
1.130 +{
1.131 + if ( !_retval )
1.132 + return NS_ERROR_INVALID_ARG;
1.133 +
1.134 + *_retval = false;
1.135 + if ( !nsCRT::strcmp(aFromDataFlavor, kHTMLMime) ) {
1.136 + if ( !nsCRT::strcmp(aToDataFlavor, kHTMLMime) )
1.137 + *_retval = true;
1.138 + else if ( !nsCRT::strcmp(aToDataFlavor, kUnicodeMime) )
1.139 + *_retval = true;
1.140 +#if NOT_NOW
1.141 +// pinkerton
1.142 +// no one uses this flavor right now, so it's just slowing things down. If anyone cares I
1.143 +// can put it back in.
1.144 + else if ( toFlavor.Equals(kAOLMailMime) )
1.145 + *_retval = true;
1.146 +#endif
1.147 + }
1.148 + return NS_OK;
1.149 +
1.150 +} // CanConvert
1.151 +
1.152 +
1.153 +
1.154 +//
1.155 +// Convert
1.156 +//
1.157 +// Convert data from one flavor to another. The data is wrapped in primitive objects so that it is
1.158 +// accessible from JS. Currently, this only accepts HTML input, so anything else is invalid.
1.159 +//
1.160 +//XXX This method copies the data WAAAAY too many time for my liking. Grrrrrr. Mostly it's because
1.161 +//XXX we _must_ put things into nsStrings so that the parser will accept it. Lame lame lame lame. We
1.162 +//XXX also can't just get raw unicode out of the nsString, so we have to allocate heap to get
1.163 +//XXX unicode out of the string. Lame lame lame.
1.164 +//
1.165 +NS_IMETHODIMP
1.166 +nsHTMLFormatConverter::Convert(const char *aFromDataFlavor, nsISupports *aFromData, uint32_t aDataLen,
1.167 + const char *aToDataFlavor, nsISupports **aToData, uint32_t *aDataToLen)
1.168 +{
1.169 + if ( !aToData || !aDataToLen )
1.170 + return NS_ERROR_INVALID_ARG;
1.171 +
1.172 + nsresult rv = NS_OK;
1.173 + *aToData = nullptr;
1.174 + *aDataToLen = 0;
1.175 +
1.176 + if ( !nsCRT::strcmp(aFromDataFlavor, kHTMLMime) ) {
1.177 + nsAutoCString toFlavor ( aToDataFlavor );
1.178 +
1.179 + // HTML on clipboard is going to always be double byte so it will be in a primitive
1.180 + // class of nsISupportsString. Also, since the data is in two byte chunks the
1.181 + // length represents the length in 1-byte chars, so we need to divide by two.
1.182 + nsCOMPtr<nsISupportsString> dataWrapper0 ( do_QueryInterface(aFromData) );
1.183 + if (!dataWrapper0) {
1.184 + return NS_ERROR_INVALID_ARG;
1.185 + }
1.186 +
1.187 + nsAutoString dataStr;
1.188 + dataWrapper0->GetData ( dataStr ); //еее COPY #1
1.189 + // note: conversion to text/plain is done inside the clipboard. we do not need to worry
1.190 + // about it here.
1.191 + if ( toFlavor.Equals(kHTMLMime) || toFlavor.Equals(kUnicodeMime) ) {
1.192 + nsresult res;
1.193 + if (toFlavor.Equals(kHTMLMime)) {
1.194 + int32_t dataLen = dataStr.Length() * 2;
1.195 + nsPrimitiveHelpers::CreatePrimitiveForData ( toFlavor.get(), dataStr.get(), dataLen, aToData );
1.196 + if ( *aToData )
1.197 + *aDataToLen = dataLen;
1.198 + } else {
1.199 + nsAutoString outStr;
1.200 + res = ConvertFromHTMLToUnicode(dataStr, outStr);
1.201 + if (NS_SUCCEEDED(res)) {
1.202 + int32_t dataLen = outStr.Length() * 2;
1.203 + nsPrimitiveHelpers::CreatePrimitiveForData ( toFlavor.get(), outStr.get(), dataLen, aToData );
1.204 + if ( *aToData )
1.205 + *aDataToLen = dataLen;
1.206 + }
1.207 + }
1.208 + } // else if HTML or Unicode
1.209 + else if ( toFlavor.Equals(kAOLMailMime) ) {
1.210 + nsAutoString outStr;
1.211 + if ( NS_SUCCEEDED(ConvertFromHTMLToAOLMail(dataStr, outStr)) ) {
1.212 + int32_t dataLen = outStr.Length() * 2;
1.213 + nsPrimitiveHelpers::CreatePrimitiveForData ( toFlavor.get(), outStr.get(), dataLen, aToData );
1.214 + if ( *aToData )
1.215 + *aDataToLen = dataLen;
1.216 + }
1.217 + } // else if AOL mail
1.218 + else {
1.219 + rv = NS_ERROR_FAILURE;
1.220 + }
1.221 + } // if we got html mime
1.222 + else
1.223 + rv = NS_ERROR_FAILURE;
1.224 +
1.225 + return rv;
1.226 +
1.227 +} // Convert
1.228 +
1.229 +
1.230 +//
1.231 +// ConvertFromHTMLToUnicode
1.232 +//
1.233 +// Takes HTML and converts it to plain text but in unicode.
1.234 +//
1.235 +NS_IMETHODIMP
1.236 +nsHTMLFormatConverter::ConvertFromHTMLToUnicode(const nsAutoString & aFromStr, nsAutoString & aToStr)
1.237 +{
1.238 + return nsContentUtils::ConvertToPlainText(aFromStr,
1.239 + aToStr,
1.240 + nsIDocumentEncoder::OutputSelectionOnly |
1.241 + nsIDocumentEncoder::OutputAbsoluteLinks |
1.242 + nsIDocumentEncoder::OutputNoScriptContent |
1.243 + nsIDocumentEncoder::OutputNoFramesContent,
1.244 + 0);
1.245 +} // ConvertFromHTMLToUnicode
1.246 +
1.247 +
1.248 +NS_IMETHODIMP
1.249 +nsHTMLFormatConverter::ConvertFromHTMLToAOLMail(const nsAutoString & aFromStr,
1.250 + nsAutoString & aToStr)
1.251 +{
1.252 + aToStr.AssignLiteral("<HTML>");
1.253 + aToStr.Append(aFromStr);
1.254 + aToStr.AppendLiteral("</HTML>");
1.255 +
1.256 + return NS_OK;
1.257 +}
1.258 +
