зеркало из https://github.com/mozilla/pjs.git
51799: Smarter quote rewrapping, taking into account multiple quote levels, and RFC2646-style citations. r=cmanske
This commit is contained in:
akkana%netscape.com
Родитель
933abfa8da
Коммит
e74c0ae592
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@ -25,8 +25,6 @@
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#include "nsString.h"
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#include "nsWrapUtils.h"
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#include "nsCOMPtr.h"
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// Line breaker stuff
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@ -34,6 +32,11 @@
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#include "nsILineBreakerFactory.h"
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#include "nsLWBrkCIID.h"
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static PRUnichar gt ('>');
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static PRUnichar space (' ');
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static PRUnichar nl ('\n');
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static PRUnichar cr('\r');
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/** Mail citations using the Internet style: > This is a citation
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*/
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@ -75,18 +78,16 @@ nsInternetCiter::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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NS_IMETHODIMP
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nsInternetCiter::GetCiteString(const nsString& aInString, nsString& aOutString)
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{
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PRUnichar newline ('\n'); // Not XP!
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PRUnichar cr('\r');
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PRInt32 i = 0;
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PRInt32 length = aInString.Length();
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aOutString.SetLength(0);
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PRUnichar uch = newline;
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PRUnichar uch = nl;
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// Strip trailing new lines which will otherwise turn up
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// as ugly quoted empty lines.
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while(length > 0 &&
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(aInString[length-1] == cr ||
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aInString[length-1] == newline))
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aInString[length-1] == nl))
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{
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--length;
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}
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@ -94,15 +95,22 @@ nsInternetCiter::GetCiteString(const nsString& aInString, nsString& aOutString)
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// Loop over the string:
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while (i < length)
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{
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if (uch == newline)
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aOutString.AppendWithConversion("> ");
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if (uch == nl)
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{
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aOutString.Append(gt);
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// No space between >: this is ">>> " style quoting, for
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// compatability with RFC 2646 and format=flowed.
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if (aInString[i] != gt)
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aOutString.Append(space);
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}
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uch = aInString[i++];
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aOutString += uch;
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}
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if (uch != newline)
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aOutString += newline;
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if (uch != nl)
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aOutString += nl;
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return NS_OK;
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}
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@ -120,7 +128,6 @@ nsInternetCiter::StripCitesAndLinebreaks(const nsString& aInString,
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PRInt32 length = aInString.Length();
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PRInt32 i = 0;
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PRUnichar gt ('>');
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while (i < length) // loop over lines
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{
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// Clear out cites first, at the beginning of the line:
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@ -164,25 +171,218 @@ nsInternetCiter::StripCites(const nsString& aInString, nsString& aOutString)
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return StripCitesAndLinebreaks(aInString, aOutString, PR_FALSE, 0);
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}
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static void AddCite(nsString& aOutString, PRInt32 citeLevel)
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{
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for (PRInt32 i = 0; i < citeLevel; ++i)
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aOutString.Append(gt);
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if (citeLevel > 0)
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aOutString.Append(space);
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}
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NS_IMETHODIMP
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nsInternetCiter::Rewrap(const nsString& aInString,
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PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
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PRBool aRespectNewlines,
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nsString& aOutString)
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{
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PRInt32 i;
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nsCOMPtr<nsILineBreaker> lineBreaker;
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nsILineBreakerFactory *lf;
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nsresult rv = NS_OK;
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rv = nsServiceManager::GetService(kLWBrkCID,
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NS_GET_IID(nsILineBreakerFactory),
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(nsISupports **)&lf);
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if (NS_SUCCEEDED(rv))
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{
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nsAutoString lbarg;
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rv = lf->GetBreaker(lbarg, getter_AddRefs(lineBreaker));
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nsServiceManager::ReleaseService(kLWBrkCID, lf);
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}
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// First, clean up all the existing newlines/cite marks and save the cite level.
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nsAutoString inString;
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PRInt32 citeLevel;
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StripCitesAndLinebreaks(aInString, inString, !aRespectNewlines, &citeLevel);
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aOutString.SetLength(0);
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nsAutoString citeString;
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for (i=0; i<citeLevel; ++i)
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citeString.AppendWithConversion("> ");
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// Loop over lines in the input string, rewrapping each one.
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PRUint32 length = aInString.Length();
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PRUint32 posInString = 0;
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PRUint32 outStringCol = 0;
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PRUint32 citeLevel = 0;
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const PRUnichar* unicodeStr = aInString.GetUnicode();
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while (posInString < length)
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{
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#ifdef DEBUG_wrapping
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nsAutoString debug (Substring(aInString, posInString, length-posInString));
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printf("Outer loop: '%s'\n", debug.ToNewCString());
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#endif
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return nsWrapUtils::Rewrap(inString, aWrapCol, aFirstLineOffset,
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aRespectNewlines, citeString,
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aOutString);
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// Get the new cite level here since we're at the beginning of a line
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PRUint32 newCiteLevel = 0;
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while (posInString < length && aInString[posInString] == gt)
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{
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++newCiteLevel;
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++posInString;
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while (posInString < length && aInString[posInString] == space)
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++posInString;
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}
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if (posInString >= length)
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break;
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// Special case: if this is a blank line, maintain a blank line
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// (retain the original paragraph breaks)
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if (aInString[posInString] == nl)
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{
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if (aOutString.Length() > 0 && aOutString[aOutString.Length()-1] != nl)
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aOutString.Append(nl);
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AddCite(aOutString, newCiteLevel);
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aOutString.Append(nl);
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++posInString;
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outStringCol = 0;
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continue;
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}
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// If the cite level has changed, then start a new line with the
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// new cite level (but if we're at the beginning of the string,
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// don't bother).
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if (newCiteLevel != citeLevel && posInString > newCiteLevel+1
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&& outStringCol != 0)
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{
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//aOutString.Append(nl);
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//AddCite(aOutString, citeLevel);
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aOutString.Append(nl);
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outStringCol = 0;
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}
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citeLevel = newCiteLevel;
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// Prepend the quote level to the out string if appropriate
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if (outStringCol == 0)
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{
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AddCite(aOutString, citeLevel);
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outStringCol = citeLevel;
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}
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// If it's not a cite, and we're not at the beginning of a line in
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// the output string, add a space to separate new text from the
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// previous text.
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else if (outStringCol > 0)
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{
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#ifdef DEBUG_wrapping
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printf("Appending space; citeLevel=%d, outStringCol=%d\n", citeLevel,
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outStringCol);
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#endif
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aOutString.Append(space);
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++outStringCol;
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}
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// find the next newline -- don't want to go farther than that
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PRUint32 nextNewline = aInString.FindChar(nl, PR_FALSE, posInString);
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if (nextNewline < 0) nextNewline = length;
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// For now, don't wrap unquoted lines at all.
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// This is because the plaintext edit window has already wrapped them
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// by the time we get them for rewrap, yet when we call the line
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// breaker, it will refuse to break backwards, and we'll end up
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// with a line that's too long and gets displayed as a lone word
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// on a line by itself. Need special logic to detect this case
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// and break it ourselves without resorting to the line breaker.
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if (citeLevel == 0)
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{
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#ifdef DEBUG_wrapping
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nsAutoString debug (Substring(aInString, posInString,
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nextNewline-posInString));
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printf("Unquoted: appending '%s'\n", debug.ToNewCString());
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#endif
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aOutString.Append(Substring(aInString, posInString,
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nextNewline-posInString));
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outStringCol += nextNewline - posInString;
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if (nextNewline != length)
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{
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#ifdef DEBUG_wrapping
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printf("unquoted: appending a newline\n");
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#endif
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aOutString.Append(nl);
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outStringCol = 0;
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}
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posInString = nextNewline+1;
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continue;
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}
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// Otherwise we have to use the line breaker and loop
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// over this line of the input string to get all of it:
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while (posInString < nextNewline)
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{
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#ifdef DEBUG_wrapping
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nsAutoString debug (Substring(aInString, posInString, nextNewline-posInString));
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printf("Inner loop: '%s'\n", debug.ToNewCString());
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#endif
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// If this is a short line, just append it and continue:
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if (outStringCol + nextNewline - posInString <= aWrapCol-citeLevel-1)
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{
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// If this short line is the final one in the in string,
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// then we need to include the final newline, if any:
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if (nextNewline+1 == length && aInString[nextNewline-1] == nl)
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++nextNewline;
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#ifdef DEBUG_wrapping
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nsAutoString debug (Substring(aInString, posInString, nextNewline - posInString));
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printf("Short line: '%s'\n", debug.ToNewCString());
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#endif
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aOutString += Substring(aInString,
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posInString, nextNewline - posInString);
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outStringCol += nextNewline - posInString;
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posInString = nextNewline + 1;
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continue;
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}
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PRInt32 eol = posInString + aWrapCol - citeLevel - 1 - outStringCol;
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// eol is the prospective end of line ...
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// first look backwards from there for a place to break.
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PRUint32 breakPt;
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PRBool needMore;
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rv = NS_ERROR_BASE;
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if (lineBreaker)
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{
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rv = lineBreaker->Prev(unicodeStr + posInString, length - posInString,
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eol - posInString, &breakPt, &needMore);
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if (NS_FAILED(rv) || needMore)
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{
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// if we couldn't find a breakpoint looking backwards,
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// try looking forwards:
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rv = lineBreaker->Next(unicodeStr + posInString,
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length - posInString,
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eol - posInString, &breakPt, &needMore);
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if (needMore) rv = NS_ERROR_BASE;
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}
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}
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// If rv is okay, then breakPt is the place to break.
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// If we get out here and rv is set, something went wrong with line
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// breaker. Just break the line, hard.
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if (NS_FAILED(rv))
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{
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#ifdef DEBUG_akkana
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printf("nsInternetCiter: LineBreaker not working -- breaking hard\n");
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#endif
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breakPt = eol;
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}
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#ifdef DEBUG_wrapping
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printf("breakPt = %d\n", breakPt);
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#endif
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aOutString += Substring(aInString, posInString, breakPt);
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posInString += breakPt;
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outStringCol += breakPt;
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// Add a newline and the quote level to the out string
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if (posInString < length) // not for the last line, though
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{
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aOutString.Append(nl);
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AddCite(aOutString, citeLevel);
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outStringCol = citeLevel + (citeLevel ? 1 : 0);
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}
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} // end inner loop within one line of aInString
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#ifdef DEBUG_wrapping
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printf("---------\nEnd inner loop: out string is now '%s'\n-----------\n",
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aOutString.ToNewCString());
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#endif
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} // end outer loop over lines of aInString
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return NS_OK;
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}
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@ -25,8 +25,6 @@
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#include "nsString.h"
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#include "nsWrapUtils.h"
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#include "nsCOMPtr.h"
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// Line breaker stuff
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@ -34,6 +32,11 @@
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#include "nsILineBreakerFactory.h"
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#include "nsLWBrkCIID.h"
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static PRUnichar gt ('>');
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static PRUnichar space (' ');
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static PRUnichar nl ('\n');
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static PRUnichar cr('\r');
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/** Mail citations using the Internet style: > This is a citation
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*/
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@ -75,18 +78,16 @@ nsInternetCiter::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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NS_IMETHODIMP
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nsInternetCiter::GetCiteString(const nsString& aInString, nsString& aOutString)
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{
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PRUnichar newline ('\n'); // Not XP!
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PRUnichar cr('\r');
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PRInt32 i = 0;
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PRInt32 length = aInString.Length();
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aOutString.SetLength(0);
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PRUnichar uch = newline;
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PRUnichar uch = nl;
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// Strip trailing new lines which will otherwise turn up
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// as ugly quoted empty lines.
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while(length > 0 &&
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(aInString[length-1] == cr ||
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aInString[length-1] == newline))
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aInString[length-1] == nl))
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{
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--length;
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}
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@ -94,15 +95,22 @@ nsInternetCiter::GetCiteString(const nsString& aInString, nsString& aOutString)
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// Loop over the string:
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while (i < length)
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{
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if (uch == newline)
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aOutString.AppendWithConversion("> ");
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if (uch == nl)
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{
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aOutString.Append(gt);
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// No space between >: this is ">>> " style quoting, for
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// compatability with RFC 2646 and format=flowed.
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if (aInString[i] != gt)
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aOutString.Append(space);
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}
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uch = aInString[i++];
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aOutString += uch;
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}
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if (uch != newline)
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aOutString += newline;
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if (uch != nl)
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aOutString += nl;
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return NS_OK;
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}
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@ -120,7 +128,6 @@ nsInternetCiter::StripCitesAndLinebreaks(const nsString& aInString,
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PRInt32 length = aInString.Length();
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PRInt32 i = 0;
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PRUnichar gt ('>');
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while (i < length) // loop over lines
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{
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// Clear out cites first, at the beginning of the line:
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|
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@ -164,25 +171,218 @@ nsInternetCiter::StripCites(const nsString& aInString, nsString& aOutString)
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return StripCitesAndLinebreaks(aInString, aOutString, PR_FALSE, 0);
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}
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static void AddCite(nsString& aOutString, PRInt32 citeLevel)
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{
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for (PRInt32 i = 0; i < citeLevel; ++i)
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aOutString.Append(gt);
|
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if (citeLevel > 0)
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aOutString.Append(space);
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}
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NS_IMETHODIMP
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nsInternetCiter::Rewrap(const nsString& aInString,
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PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
|
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PRBool aRespectNewlines,
|
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nsString& aOutString)
|
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{
|
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PRInt32 i;
|
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nsCOMPtr<nsILineBreaker> lineBreaker;
|
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nsILineBreakerFactory *lf;
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nsresult rv = NS_OK;
|
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rv = nsServiceManager::GetService(kLWBrkCID,
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NS_GET_IID(nsILineBreakerFactory),
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(nsISupports **)&lf);
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if (NS_SUCCEEDED(rv))
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{
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nsAutoString lbarg;
|
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rv = lf->GetBreaker(lbarg, getter_AddRefs(lineBreaker));
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nsServiceManager::ReleaseService(kLWBrkCID, lf);
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}
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// First, clean up all the existing newlines/cite marks and save the cite level.
|
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nsAutoString inString;
|
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PRInt32 citeLevel;
|
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StripCitesAndLinebreaks(aInString, inString, !aRespectNewlines, &citeLevel);
|
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aOutString.SetLength(0);
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|
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nsAutoString citeString;
|
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for (i=0; i<citeLevel; ++i)
|
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citeString.AppendWithConversion("> ");
|
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// Loop over lines in the input string, rewrapping each one.
|
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PRUint32 length = aInString.Length();
|
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PRUint32 posInString = 0;
|
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PRUint32 outStringCol = 0;
|
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PRUint32 citeLevel = 0;
|
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const PRUnichar* unicodeStr = aInString.GetUnicode();
|
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while (posInString < length)
|
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{
|
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#ifdef DEBUG_wrapping
|
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nsAutoString debug (Substring(aInString, posInString, length-posInString));
|
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printf("Outer loop: '%s'\n", debug.ToNewCString());
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#endif
|
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|
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return nsWrapUtils::Rewrap(inString, aWrapCol, aFirstLineOffset,
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||||
aRespectNewlines, citeString,
|
||||
aOutString);
|
||||
// Get the new cite level here since we're at the beginning of a line
|
||||
PRUint32 newCiteLevel = 0;
|
||||
while (posInString < length && aInString[posInString] == gt)
|
||||
{
|
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++newCiteLevel;
|
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++posInString;
|
||||
while (posInString < length && aInString[posInString] == space)
|
||||
++posInString;
|
||||
}
|
||||
if (posInString >= length)
|
||||
break;
|
||||
|
||||
// Special case: if this is a blank line, maintain a blank line
|
||||
// (retain the original paragraph breaks)
|
||||
if (aInString[posInString] == nl)
|
||||
{
|
||||
if (aOutString.Length() > 0 && aOutString[aOutString.Length()-1] != nl)
|
||||
aOutString.Append(nl);
|
||||
AddCite(aOutString, newCiteLevel);
|
||||
aOutString.Append(nl);
|
||||
|
||||
++posInString;
|
||||
outStringCol = 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
// If the cite level has changed, then start a new line with the
|
||||
// new cite level (but if we're at the beginning of the string,
|
||||
// don't bother).
|
||||
if (newCiteLevel != citeLevel && posInString > newCiteLevel+1
|
||||
&& outStringCol != 0)
|
||||
{
|
||||
//aOutString.Append(nl);
|
||||
//AddCite(aOutString, citeLevel);
|
||||
aOutString.Append(nl);
|
||||
outStringCol = 0;
|
||||
}
|
||||
citeLevel = newCiteLevel;
|
||||
|
||||
// Prepend the quote level to the out string if appropriate
|
||||
if (outStringCol == 0)
|
||||
{
|
||||
AddCite(aOutString, citeLevel);
|
||||
outStringCol = citeLevel;
|
||||
}
|
||||
// If it's not a cite, and we're not at the beginning of a line in
|
||||
// the output string, add a space to separate new text from the
|
||||
// previous text.
|
||||
else if (outStringCol > 0)
|
||||
{
|
||||
#ifdef DEBUG_wrapping
|
||||
printf("Appending space; citeLevel=%d, outStringCol=%d\n", citeLevel,
|
||||
outStringCol);
|
||||
#endif
|
||||
aOutString.Append(space);
|
||||
++outStringCol;
|
||||
}
|
||||
|
||||
// find the next newline -- don't want to go farther than that
|
||||
PRUint32 nextNewline = aInString.FindChar(nl, PR_FALSE, posInString);
|
||||
if (nextNewline < 0) nextNewline = length;
|
||||
|
||||
// For now, don't wrap unquoted lines at all.
|
||||
// This is because the plaintext edit window has already wrapped them
|
||||
// by the time we get them for rewrap, yet when we call the line
|
||||
// breaker, it will refuse to break backwards, and we'll end up
|
||||
// with a line that's too long and gets displayed as a lone word
|
||||
// on a line by itself. Need special logic to detect this case
|
||||
// and break it ourselves without resorting to the line breaker.
|
||||
if (citeLevel == 0)
|
||||
{
|
||||
#ifdef DEBUG_wrapping
|
||||
nsAutoString debug (Substring(aInString, posInString,
|
||||
nextNewline-posInString));
|
||||
printf("Unquoted: appending '%s'\n", debug.ToNewCString());
|
||||
#endif
|
||||
aOutString.Append(Substring(aInString, posInString,
|
||||
nextNewline-posInString));
|
||||
outStringCol += nextNewline - posInString;
|
||||
if (nextNewline != length)
|
||||
{
|
||||
#ifdef DEBUG_wrapping
|
||||
printf("unquoted: appending a newline\n");
|
||||
#endif
|
||||
aOutString.Append(nl);
|
||||
outStringCol = 0;
|
||||
}
|
||||
posInString = nextNewline+1;
|
||||
continue;
|
||||
}
|
||||
|
||||
// Otherwise we have to use the line breaker and loop
|
||||
// over this line of the input string to get all of it:
|
||||
while (posInString < nextNewline)
|
||||
{
|
||||
#ifdef DEBUG_wrapping
|
||||
nsAutoString debug (Substring(aInString, posInString, nextNewline-posInString));
|
||||
printf("Inner loop: '%s'\n", debug.ToNewCString());
|
||||
#endif
|
||||
|
||||
// If this is a short line, just append it and continue:
|
||||
if (outStringCol + nextNewline - posInString <= aWrapCol-citeLevel-1)
|
||||
{
|
||||
// If this short line is the final one in the in string,
|
||||
// then we need to include the final newline, if any:
|
||||
if (nextNewline+1 == length && aInString[nextNewline-1] == nl)
|
||||
++nextNewline;
|
||||
#ifdef DEBUG_wrapping
|
||||
nsAutoString debug (Substring(aInString, posInString, nextNewline - posInString));
|
||||
printf("Short line: '%s'\n", debug.ToNewCString());
|
||||
#endif
|
||||
aOutString += Substring(aInString,
|
||||
posInString, nextNewline - posInString);
|
||||
outStringCol += nextNewline - posInString;
|
||||
posInString = nextNewline + 1;
|
||||
continue;
|
||||
}
|
||||
|
||||
PRInt32 eol = posInString + aWrapCol - citeLevel - 1 - outStringCol;
|
||||
// eol is the prospective end of line ...
|
||||
// first look backwards from there for a place to break.
|
||||
PRUint32 breakPt;
|
||||
PRBool needMore;
|
||||
rv = NS_ERROR_BASE;
|
||||
if (lineBreaker)
|
||||
{
|
||||
rv = lineBreaker->Prev(unicodeStr + posInString, length - posInString,
|
||||
eol - posInString, &breakPt, &needMore);
|
||||
if (NS_FAILED(rv) || needMore)
|
||||
{
|
||||
// if we couldn't find a breakpoint looking backwards,
|
||||
// try looking forwards:
|
||||
rv = lineBreaker->Next(unicodeStr + posInString,
|
||||
length - posInString,
|
||||
eol - posInString, &breakPt, &needMore);
|
||||
if (needMore) rv = NS_ERROR_BASE;
|
||||
}
|
||||
}
|
||||
// If rv is okay, then breakPt is the place to break.
|
||||
// If we get out here and rv is set, something went wrong with line
|
||||
// breaker. Just break the line, hard.
|
||||
if (NS_FAILED(rv))
|
||||
{
|
||||
#ifdef DEBUG_akkana
|
||||
printf("nsInternetCiter: LineBreaker not working -- breaking hard\n");
|
||||
#endif
|
||||
breakPt = eol;
|
||||
}
|
||||
#ifdef DEBUG_wrapping
|
||||
printf("breakPt = %d\n", breakPt);
|
||||
#endif
|
||||
|
||||
aOutString += Substring(aInString, posInString, breakPt);
|
||||
posInString += breakPt;
|
||||
outStringCol += breakPt;
|
||||
|
||||
// Add a newline and the quote level to the out string
|
||||
if (posInString < length) // not for the last line, though
|
||||
{
|
||||
aOutString.Append(nl);
|
||||
AddCite(aOutString, citeLevel);
|
||||
outStringCol = citeLevel + (citeLevel ? 1 : 0);
|
||||
}
|
||||
} // end inner loop within one line of aInString
|
||||
#ifdef DEBUG_wrapping
|
||||
printf("---------\nEnd inner loop: out string is now '%s'\n-----------\n",
|
||||
aOutString.ToNewCString());
|
||||
#endif
|
||||
} // end outer loop over lines of aInString
|
||||
|
||||
return NS_OK;
|
||||
}
|
||||
|
||||
|
|
|
|||
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