Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 184 insertions, 0 deletions

diff --git a/widget/nsHTMLFormatConverter.cpp b/widget/nsHTMLFormatConverter.cpp
new file mode 100644
index 0000000000..4898fd2c8b
--- /dev/null
+++ b/widget/nsHTMLFormatConverter.cpp
@@ -0,0 +1,184 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsHTMLFormatConverter.h"
+
+#include "nsArray.h"
+#include "nsCRT.h"
+#include "nsCOMPtr.h"
+#include "nsITransferable.h"
+#include "nsLiteralString.h"
+#include "nsXPCOM.h"
+#include "nsISupportsPrimitives.h"
+
+// HTML convertor stuff
+#include "nsPrimitiveHelpers.h"
+#include "nsIDocumentEncoder.h"
+#include "nsContentUtils.h"
+
+nsHTMLFormatConverter::nsHTMLFormatConverter() = default;
+
+nsHTMLFormatConverter::~nsHTMLFormatConverter() = default;
+
+NS_IMPL_ISUPPORTS(nsHTMLFormatConverter, nsIFormatConverter)
+
+//
+// GetInputDataFlavors
+//
+// Creates a new list and returns the list of all the flavors this converter
+// knows how to import. In this case, it's just HTML.
+//
+NS_IMETHODIMP
+nsHTMLFormatConverter::GetInputDataFlavors(nsTArray<nsCString>& aFlavors) {
+  aFlavors.AppendElement(nsLiteralCString(kHTMLMime));
+  return NS_OK;
+}
+
+//
+// GetOutputDataFlavors
+//
+// Creates a new list and returns the list of all the flavors this converter
+// knows how to export (convert). In this case, it's all sorts of things that
+// HTML can be converted to.
+//
+NS_IMETHODIMP
+nsHTMLFormatConverter::GetOutputDataFlavors(nsTArray<nsCString>& aFlavors) {
+  aFlavors.AppendElement(nsLiteralCString(kHTMLMime));
+  aFlavors.AppendElement(nsLiteralCString(kTextMime));
+  return NS_OK;
+}
+
+//
+// CanConvert
+//
+// Determines if we support the given conversion. Currently, this method only
+// converts from HTML to others.
+//
+NS_IMETHODIMP
+nsHTMLFormatConverter::CanConvert(const char* aFromDataFlavor,
+                                  const char* aToDataFlavor, bool* _retval) {
+  if (!_retval) return NS_ERROR_INVALID_ARG;
+
+  *_retval = false;
+  if (!nsCRT::strcmp(aFromDataFlavor, kHTMLMime)) {
+    if (!nsCRT::strcmp(aToDataFlavor, kHTMLMime)) {
+      *_retval = true;
+    } else if (!nsCRT::strcmp(aToDataFlavor, kTextMime)) {
+      *_retval = true;
+    }
+#if NOT_NOW
+    // pinkerton
+    // no one uses this flavor right now, so it's just slowing things down. If
+    // anyone cares I can put it back in.
+    else if (toFlavor.Equals(kAOLMailMime))
+      *_retval = true;
+#endif
+  }
+  return NS_OK;
+
+}  // CanConvert
+
+//
+// Convert
+//
+// Convert data from one flavor to another. The data is wrapped in primitive
+// objects so that it is accessible from JS. Currently, this only accepts HTML
+// input, so anything else is invalid.
+//
+// XXX This method copies the data WAAAAY too many time for my liking. Grrrrrr.
+// Mostly it's because
+// XXX we _must_ put things into nsStrings so that the parser will accept it.
+// Lame lame lame lame. We
+// XXX also can't just get raw unicode out of the nsString, so we have to
+// allocate heap to get
+// XXX unicode out of the string. Lame lame lame.
+//
+NS_IMETHODIMP
+nsHTMLFormatConverter::Convert(const char* aFromDataFlavor,
+                               nsISupports* aFromData,
+                               const char* aToDataFlavor,
+                               nsISupports** aToData) {
+  if (!aToData) return NS_ERROR_INVALID_ARG;
+
+  nsresult rv = NS_OK;
+  *aToData = nullptr;
+
+  if (!nsCRT::strcmp(aFromDataFlavor, kHTMLMime)) {
+    nsAutoCString toFlavor(aToDataFlavor);
+
+    // HTML on clipboard is going to always be double byte so it will be in a
+    // primitive class of nsISupportsString. Also, since the data is in two byte
+    // chunks the length represents the length in 1-byte chars, so we need to
+    // divide by two.
+    nsCOMPtr<nsISupportsString> dataWrapper0(do_QueryInterface(aFromData));
+    if (!dataWrapper0) {
+      return NS_ERROR_INVALID_ARG;
+    }
+
+    nsAutoString dataStr;
+    dataWrapper0->GetData(dataStr);  // COPY #1
+    // note: conversion to text/plain is done inside the clipboard. we do not
+    // need to worry about it here.
+    if (toFlavor.Equals(kHTMLMime) || toFlavor.Equals(kTextMime)) {
+      nsresult res;
+      if (toFlavor.Equals(kHTMLMime)) {
+        int32_t dataLen = dataStr.Length() * 2;
+        nsPrimitiveHelpers::CreatePrimitiveForData(toFlavor, dataStr.get(),
+                                                   dataLen, aToData);
+      } else {
+        nsAutoString outStr;
+        res = ConvertFromHTMLToUnicode(dataStr, outStr);
+        if (NS_SUCCEEDED(res)) {
+          int32_t dataLen = outStr.Length() * 2;
+          nsPrimitiveHelpers::CreatePrimitiveForData(toFlavor, outStr.get(),
+                                                     dataLen, aToData);
+        }
+      }
+    }  // else if HTML or Unicode
+    else if (toFlavor.Equals(kAOLMailMime)) {
+      nsAutoString outStr;
+      if (NS_SUCCEEDED(ConvertFromHTMLToAOLMail(dataStr, outStr))) {
+        int32_t dataLen = outStr.Length() * 2;
+        nsPrimitiveHelpers::CreatePrimitiveForData(toFlavor, outStr.get(),
+                                                   dataLen, aToData);
+      }
+    }  // else if AOL mail
+    else {
+      rv = NS_ERROR_FAILURE;
+    }
+  }  // if we got html mime
+  else
+    rv = NS_ERROR_FAILURE;
+
+  return rv;
+
+}  // Convert
+
+//
+// ConvertFromHTMLToUnicode
+//
+// Takes HTML and converts it to plain text but in unicode.
+//
+NS_IMETHODIMP
+nsHTMLFormatConverter::ConvertFromHTMLToUnicode(const nsAutoString& aFromStr,
+                                                nsAutoString& aToStr) {
+  return nsContentUtils::ConvertToPlainText(
+      aFromStr, aToStr,
+      nsIDocumentEncoder::OutputSelectionOnly |
+          nsIDocumentEncoder::OutputAbsoluteLinks |
+          nsIDocumentEncoder::OutputNoScriptContent |
+          nsIDocumentEncoder::OutputNoFramesContent,
+      0);
+}  // ConvertFromHTMLToUnicode
+
+NS_IMETHODIMP
+nsHTMLFormatConverter::ConvertFromHTMLToAOLMail(const nsAutoString& aFromStr,
+                                                nsAutoString& aToStr) {
+  aToStr.AssignLiteral("<HTML>");
+  aToStr.Append(aFromStr);
+  aToStr.AppendLiteral("</HTML>");
+
+  return NS_OK;
+}