1 files changed, 165 insertions, 0 deletions
diff --git a/mailnews/mime/src/mimethpl.cpp b/mailnews/mime/src/mimethpl.cpp
new file mode 100644
index 000000000..9d01229f9
--- /dev/null
+++ b/mailnews/mime/src/mimethpl.cpp
@@ -0,0 +1,165 @@
+/* -*- Mode: C; tab-width: 4; 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/. */
+
+/* TODO:
+  - If you Save As File .html with this mode, you get a total mess.
+  - Print is untested (crashes in all modes).
+*/
+/* If you fix a bug here, check, if the same is also in mimethsa, because that
+   class is based on this class. */
+
+#include "mimethpl.h"
+#include "prlog.h"
+#include "msgCore.h"
+#include "mimemoz2.h"
+#include "nsStringGlue.h"
+#include "nsIDocumentEncoder.h" // for output flags
+
+#define MIME_SUPERCLASS mimeInlineTextPlainClass
+/* I should use the Flowed class as base (because our HTML->TXT converter
+   can generate flowed, and we tell it to) - this would get a bit nicer
+   rendering. However, that class is more picky about line endings
+   and I currently don't feel like splitting up the generated plaintext
+   into separate lines again. So, I just throw the whole message at once
+   at the TextPlain_parse_line function - it happens to work *g*. */
+MimeDefClass(MimeInlineTextHTMLAsPlaintext, MimeInlineTextHTMLAsPlaintextClass,
+       mimeInlineTextHTMLAsPlaintextClass, &MIME_SUPERCLASS);
+
+static int MimeInlineTextHTMLAsPlaintext_parse_line (const char *, int32_t,
+                                                     MimeObject *);
+static int MimeInlineTextHTMLAsPlaintext_parse_begin (MimeObject *obj);
+static int MimeInlineTextHTMLAsPlaintext_parse_eof (MimeObject *, bool);
+static void MimeInlineTextHTMLAsPlaintext_finalize (MimeObject *obj);
+
+static int
+MimeInlineTextHTMLAsPlaintextClassInitialize(MimeInlineTextHTMLAsPlaintextClass *clazz)
+{
+  MimeObjectClass *oclass = (MimeObjectClass *) clazz;
+  NS_ASSERTION(!oclass->class_initialized, "problem with superclass");
+  oclass->parse_line  = MimeInlineTextHTMLAsPlaintext_parse_line;
+  oclass->parse_begin = MimeInlineTextHTMLAsPlaintext_parse_begin;
+  oclass->parse_eof   = MimeInlineTextHTMLAsPlaintext_parse_eof;
+  oclass->finalize    = MimeInlineTextHTMLAsPlaintext_finalize;
+
+  return 0;
+}
+
+static int
+MimeInlineTextHTMLAsPlaintext_parse_begin (MimeObject *obj)
+{
+  MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
+                                       (MimeInlineTextHTMLAsPlaintext *) obj;
+  textHTMLPlain->complete_buffer = new nsString();
+     // Let's just hope that libmime won't have the idea to call begin twice...
+  return ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_begin(obj);
+}
+
+static int
+MimeInlineTextHTMLAsPlaintext_parse_eof (MimeObject *obj, bool abort_p)
+{
+  if (obj->closed_p)
+    return 0;
+
+  // This is a hack. We need to call parse_eof() of the super class to flush out any buffered data.
+  // We can't call it yet for our direct super class, because it would "close" the output
+  // (write tags such as </pre> and </div>). We'll do that after parsing the buffer.
+  int status = ((MimeObjectClass*)&MIME_SUPERCLASS)->superclass->parse_eof(obj, abort_p);
+  if (status < 0)
+    return status;
+
+  MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
+                                       (MimeInlineTextHTMLAsPlaintext *) obj;
+
+  if (!textHTMLPlain || !textHTMLPlain->complete_buffer)
+    return 0;
+
+  nsString& cb = *(textHTMLPlain->complete_buffer);
+
+  // could be empty, e.g., if part isn't actually being displayed
+  if (cb.Length())
+  {
+    nsString asPlaintext;
+    uint32_t flags = nsIDocumentEncoder::OutputFormatted
+      | nsIDocumentEncoder::OutputWrap
+      | nsIDocumentEncoder::OutputFormatFlowed
+      | nsIDocumentEncoder::OutputLFLineBreak
+      | nsIDocumentEncoder::OutputNoScriptContent
+      | nsIDocumentEncoder::OutputNoFramesContent
+      | nsIDocumentEncoder::OutputBodyOnly;
+    HTML2Plaintext(cb, asPlaintext, flags, 80);
+
+    NS_ConvertUTF16toUTF8 resultCStr(asPlaintext);
+    // TODO parse each line independently
+    status = ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_line(
+                               resultCStr.BeginWriting(),
+                               resultCStr.Length(),
+                               obj);
+    cb.Truncate();
+  }
+
+  if (status < 0)
+    return status;
+
+  // Second part of the flush hack. Pretend obj wasn't closed yet, so that our super class
+  // gets a chance to write the closing.
+  bool save_closed_p = obj->closed_p;
+  obj->closed_p = false;
+  status = ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_eof(obj, abort_p);
+  // Restore closed_p.
+  obj->closed_p = save_closed_p;
+  return status;
+}
+
+void
+MimeInlineTextHTMLAsPlaintext_finalize (MimeObject *obj)
+{
+  MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
+                                        (MimeInlineTextHTMLAsPlaintext *) obj;
+  if (textHTMLPlain && textHTMLPlain->complete_buffer)
+  {
+    // If there's content in the buffer, make sure that we output it.
+    // don't care about return codes
+    obj->clazz->parse_eof(obj, false);
+
+    delete textHTMLPlain->complete_buffer;
+    textHTMLPlain->complete_buffer = NULL;
+      /* It is important to zero the pointer, so we can reliably check for
+         the validity of it in the other functions. See above. */
+  }
+  ((MimeObjectClass*)&MIME_SUPERCLASS)->finalize (obj);
+}
+
+static int
+MimeInlineTextHTMLAsPlaintext_parse_line (const char *line, int32_t length,
+                                          MimeObject *obj)
+{
+  MimeInlineTextHTMLAsPlaintext *textHTMLPlain =
+                                       (MimeInlineTextHTMLAsPlaintext *) obj;
+
+  if (!textHTMLPlain || !(textHTMLPlain->complete_buffer))
+  {
+#if DEBUG
+printf("Can't output: %s\n", line);
+#endif
+    return -1;
+  }
+
+  /*
+    To convert HTML->TXT syncronously, I need the full source at once,
+    not line by line (how do you convert "<li>foo\n" to plaintext?).
+    parse_decoded_buffer claims to give me that, but in fact also gives
+    me single lines.
+    It might be theoretically possible to drive this asyncronously, but
+    I don't know, which odd circumstances might arise and how libmime
+    will behave then. It's not worth the trouble for me to figure this all out.
+   */
+  nsCString linestr(line, length);
+  NS_ConvertUTF8toUTF16 line_ucs2(linestr.get());
+  if (length && line_ucs2.IsEmpty())
+    CopyASCIItoUTF16 (linestr, line_ucs2);
+  (textHTMLPlain->complete_buffer)->Append(line_ucs2);
+
+  return 0;
+}