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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+/* -*- 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/. */
+
+/**
+ Description: Currently only functions to enhance plain text with HTML tags. See mozITXTToHTMLConv. Stream conversion is defunct.
+*/
+
+#ifndef _mozTXTToHTMLConv_h__
+#define _mozTXTToHTMLConv_h__
+
+#include "mozITXTToHTMLConv.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+
+class nsIIOService;
+
+class mozTXTToHTMLConv : public mozITXTToHTMLConv
+{
+
+ virtual ~mozTXTToHTMLConv();
+
+//////////////////////////////////////////////////////////
+public:
+//////////////////////////////////////////////////////////
+
+ mozTXTToHTMLConv();
+ NS_DECL_ISUPPORTS
+
+ NS_DECL_MOZITXTTOHTMLCONV
+ NS_DECL_NSIREQUESTOBSERVER
+ NS_DECL_NSISTREAMLISTENER
+ NS_DECL_NSISTREAMCONVERTER
+
+/**
+ see mozITXTToHTMLConv::ScanTXT
+ */
+ void ScanTXT(const char16_t * aInString, int32_t aInStringLength, uint32_t whattodo, nsString& aOutString);
+
+/**
+ see mozITXTToHTMLConv::ScanHTML. We will modify aInString potentially...
+ */
+ void ScanHTML(nsString& aInString, uint32_t whattodo, nsString &aOutString);
+
+/**
+ see mozITXTToHTMLConv::CiteLevelTXT
+ */
+ int32_t CiteLevelTXT(const char16_t * line,uint32_t& logLineStart);
+
+
+//////////////////////////////////////////////////////////
+protected:
+//////////////////////////////////////////////////////////
+ nsCOMPtr<nsIIOService> mIOService; // for performance reasons, cache the netwerk service...
+/**
+ Completes<ul>
+ <li>Case 1: mailto: "mozilla@bucksch.org" -> "mailto:mozilla@bucksch.org"
+ <li>Case 2: http: "www.mozilla.org" -> "http://www.mozilla.org"
+ <li>Case 3: ftp: "ftp.mozilla.org" -> "ftp://www.mozilla.org"
+ </ul>
+ It does no check, if the resulting URL is valid.
+ @param text (in): abbreviated URL
+ @param pos (in): position of "@" (case 1) or first "." (case 2 and 3)
+ @return Completed URL at success and empty string at failure
+ */
+ void CompleteAbbreviatedURL(const char16_t * aInString, int32_t aInLength,
+ const uint32_t pos, nsString& aOutString);
+
+
+//////////////////////////////////////////////////////////
+private:
+//////////////////////////////////////////////////////////
+
+ enum LIMTYPE
+ {
+ LT_IGNORE, // limitation not checked
+ LT_DELIMITER, // not alphanumeric and not rep[0]. End of text is also ok.
+ LT_ALPHA, // alpha char
+ LT_DIGIT
+ };
+
+/**
+ @param text (in): the string to search through.<p>
+ If before = IGNORE,<br>
+ rep is compared starting at 1. char of text (text[0]),<br>
+ else starting at 2. char of text (text[1]).
+ Chars after "after"-delimiter are ignored.
+ @param rep (in): the string to look for
+ @param aRepLen (in): the number of bytes in the string to look for
+ @param before (in): limitation before rep
+ @param after (in): limitation after rep
+ @return true, if rep is found and limitation spec is met or rep is empty
+*/
+ bool ItMatchesDelimited(const char16_t * aInString, int32_t aInLength,
+ const char16_t * rep, int32_t aRepLen, LIMTYPE before, LIMTYPE after);
+
+/**
+ @param see ItMatchesDelimited
+ @return Number of ItMatchesDelimited in text
+*/
+ uint32_t NumberOfMatches(const char16_t * aInString, int32_t aInStringLength,
+ const char16_t* rep, int32_t aRepLen, LIMTYPE before, LIMTYPE after);
+
+/**
+ Currently only changes "<", ">" and "&". All others stay as they are.<p>
+ "Char" in function name to avoid side effects with nsString(ch)
+ constructors.
+ @param ch (in)
+ @param aStringToAppendto (out) - the string to append the escaped
+ string to.
+ @param inAttribute (in) - will escape quotes, too (which is
+ only needed for attribute values)
+*/
+ void EscapeChar(const char16_t ch, nsString& aStringToAppendto,
+ bool inAttribute);
+
+/**
+ See EscapeChar. Escapes the string in place.
+*/
+ void EscapeStr(nsString& aInString, bool inAttribute);
+
+/**
+ Currently only reverts "<", ">" and "&". All others stay as they are.<p>
+ @param aInString (in) HTML string
+ @param aStartPos (in) start index into the buffer
+ @param aLength (in) length of the buffer
+ @param aOutString (out) unescaped buffer
+*/
+ void UnescapeStr(const char16_t * aInString, int32_t aStartPos,
+ int32_t aLength, nsString& aOutString);
+
+/**
+ <em>Note</em>: I use different strategies to pass context between the
+ functions (full text and pos vs. cutted text and col0, glphyTextLen vs.
+ replaceBefore/-After). It makes some sense, but is hard to understand
+ (maintain) :-(.
+*/
+
+/**
+ <p><em>Note:</em> replaceBefore + replaceAfter + 1 (for char at pos) chars
+ in text should be replaced by outputHTML.</p>
+ <p><em>Note:</em> This function should be able to process a URL on multiple
+ lines, but currently, ScanForURLs is called for every line, so it can't.</p>
+ @param text (in): includes possibly a URL
+ @param pos (in): position in text, where either ":", "." or "@" are found
+ @param whathasbeendone (in): What the calling ScanTXT did/has to do with the
+ (not-linkified) text, i.e. usually the "whattodo" parameter.
+ (Needed to calculate replaceBefore.) NOT what will be done with
+ the content of the link.
+ @param outputHTML (out): URL with HTML-a tag
+ @param replaceBefore (out): Number of chars of URL before pos
+ @param replaceAfter (out): Number of chars of URL after pos
+ @return URL found
+*/
+ bool FindURL(const char16_t * aInString, int32_t aInLength, const uint32_t pos,
+ const uint32_t whathasbeendone,
+ nsString& outputHTML, int32_t& replaceBefore, int32_t& replaceAfter);
+
+ enum modetype {
+ unknown,
+ RFC1738, /* Check, if RFC1738, APPENDIX compliant,
+ like "<URL:http://www.mozilla.org>". */
+ RFC2396E, /* RFC2396, APPENDIX E allows anglebrackets (like
+ "<http://www.mozilla.org>") (without "URL:") or
+ quotation marks(like ""http://www.mozilla.org"").
+ Also allow email addresses without scheme,
+ e.g. "<mozilla@bucksch.org>" */
+ freetext, /* assume heading scheme
+ with "[a-zA-Z][a-zA-Z0-9+\-\.]*:" like "news:"
+ (see RFC2396, Section 3.1).
+ Certain characters (see code) or any whitespace
+ (including linebreaks) end the URL.
+ Other certain (punctation) characters (see code)
+ at the end are stripped off. */
+ abbreviated /* Similar to freetext, but without scheme, e.g.
+ "www.mozilla.org", "ftp.mozilla.org" and
+ "mozilla@bucksch.org". */
+ /* RFC1738 and RFC2396E type URLs may use multiple lines,
+ whitespace is stripped. Special characters like ")" stay intact.*/
+ };
+
+/**
+ * @param text (in), pos (in): see FindURL
+ * @param check (in): Start must be conform with this mode
+ * @param start (out): Position in text, where URL (including brackets or
+ * similar) starts
+ * @return |check|-conform start has been found
+ */
+ bool FindURLStart(const char16_t * aInString, int32_t aInLength, const uint32_t pos,
+ const modetype check, uint32_t& start);
+
+/**
+ * @param text (in), pos (in): see FindURL
+ * @param check (in): End must be conform with this mode
+ * @param start (in): see FindURLStart
+ * @param end (out): Similar to |start| param of FindURLStart
+ * @return |check|-conform end has been found
+ */
+ bool FindURLEnd(const char16_t * aInString, int32_t aInStringLength, const uint32_t pos,
+ const modetype check, const uint32_t start, uint32_t& end);
+
+/**
+ * @param text (in), pos (in), whathasbeendone (in): see FindURL
+ * @param check (in): Current mode
+ * @param start (in), end (in): see FindURLEnd
+ * @param txtURL (out): Guessed (raw) URL.
+ * Without whitespace, but not completed.
+ * @param desc (out): Link as shown to the user, but already escaped.
+ * Should be placed between the <a> and </a> tags.
+ * @param replaceBefore(out), replaceAfter (out): see FindURL
+ */
+ void CalculateURLBoundaries(const char16_t * aInString, int32_t aInStringLength,
+ const uint32_t pos, const uint32_t whathasbeendone,
+ const modetype check, const uint32_t start, const uint32_t end,
+ nsString& txtURL, nsString& desc,
+ int32_t& replaceBefore, int32_t& replaceAfter);
+
+/**
+ * @param txtURL (in), desc (in): see CalculateURLBoundaries
+ * @param outputHTML (out): see FindURL
+ * @return A valid URL could be found (and creation of HTML successful)
+ */
+ bool CheckURLAndCreateHTML(
+ const nsString& txtURL, const nsString& desc, const modetype mode,
+ nsString& outputHTML);
+
+/**
+ @param text (in): line of text possibly with tagTXT.<p>
+ if col0 is true,
+ starting with tagTXT<br>
+ else
+ starting one char before tagTXT
+ @param col0 (in): tagTXT is on the beginning of the line (or paragraph).
+ open must be 0 then.
+ @param tagTXT (in): Tag in plaintext to search for, e.g. "*"
+ @param aTagTxtLen (in): length of tagTXT.
+ @param tagHTML (in): HTML-Tag to replace tagTXT with,
+ without "<" and ">", e.g. "strong"
+ @param attributeHTML (in): HTML-attribute to add to opening tagHTML,
+ e.g. "class=txt_star"
+ @param aOutString: string to APPEND the converted html into
+ @param open (in/out): Number of currently open tags of type tagHTML
+ @return Conversion succeeded
+*/
+ bool StructPhraseHit(const char16_t * aInString, int32_t aInStringLength, bool col0,
+ const char16_t* tagTXT,
+ int32_t aTagTxtLen,
+ const char* tagHTML, const char* attributeHTML,
+ nsString& aOutputString, uint32_t& openTags);
+
+/**
+ @param text (in), col0 (in): see GlyphHit
+ @param tagTXT (in): Smily, see also StructPhraseHit
+ @param imageName (in): the basename of the file that contains the image for this smilie
+ @param outputHTML (out): new string containing the html for the smily
+ @param glyphTextLen (out): see GlyphHit
+*/
+ bool
+ SmilyHit(const char16_t * aInString, int32_t aLength, bool col0,
+ const char* tagTXT, const char* imageName,
+ nsString& outputHTML, int32_t& glyphTextLen);
+
+/**
+ Checks, if we can replace some chars at the start of line with prettier HTML
+ code.<p>
+ If success is reported, replace the first glyphTextLen chars with outputHTML
+
+ @param text (in): line of text possibly with Glyph.<p>
+ If col0 is true,
+ starting with Glyph <br><!-- (br not part of text) -->
+ else
+ starting one char before Glyph
+ @param col0 (in): text starts at the beginning of the line (or paragraph)
+ @param aOutString (out): APPENDS html for the glyph to this string
+ @param glyphTextLen (out): Length of original text to replace
+ @return see StructPhraseHit
+*/
+ bool GlyphHit(const char16_t * aInString, int32_t aInLength, bool col0,
+ nsString& aOutString, int32_t& glyphTextLen);
+
+/**
+ Check if a given url should be linkified.
+ @param aURL (in): url to be checked on.
+*/
+ bool ShouldLinkify(const nsCString& aURL);
+};
+
+// It's said, that Win32 and Mac don't like static const members
+const int32_t mozTXTToHTMLConv_lastMode = 4;
+ // Needed (only) by mozTXTToHTMLConv::FindURL
+const int32_t mozTXTToHTMLConv_numberOfModes = 4; // dito; unknown not counted
+
+#endif