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authorMatt A. Tobin <email@mattatobin.com>2019-11-03 00:17:46 -0400
committerMatt A. Tobin <email@mattatobin.com>2019-11-03 00:17:46 -0400
commit302bf1b523012e11b60425d6eee1221ebc2724eb (patch)
treeb191a895f8716efcbe42f454f37597a545a6f421 /mailnews/mime/src/mimethpl.cpp
parent21b3f6247403c06f85e1f45d219f87549862198f (diff)
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Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1
Diffstat (limited to 'mailnews/mime/src/mimethpl.cpp')
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diff --git a/mailnews/mime/src/mimethpl.cpp b/mailnews/mime/src/mimethpl.cpp
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+/* -*- 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;
+}