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Code Issues Releases Wiki Activity

Re-desined textToHtml() according to the state transition diagram.

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This commit is contained in:
Koji Arai 2013-05-11 08:44:17 +09:00
parent 6c4461cd13
commit 4dcf50d127
2 changed files with 105 additions and 79 deletions
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157
src/com/fsck/k9/helper/HtmlConverter.java
View File

@ -211,87 +211,54 @@ public class HtmlConverter {
}
StringReader reader = new StringReader(text);
StringBuilder buff = new StringBuilder(text.length() + TEXT_TO_HTML_EXTRA_BUFFER_LENGTH);
boolean isStartOfLine = false; // Are we currently at the start of a line?
boolean isStartOfLine = true; // Are we currently at the start of a line?
int spaces = 0;
int quoteDepth = 0; // Number of DIVs deep we are.
int quotesThisLine = 0; // How deep we should be quoting for this line.
try {
int c;
while ((c = reader.read()) != -1) {
switch (c) {
case '\n':
case '&':
case '<':
case '\r':
if (isStartOfLine) {
while (spaces-- > 0) {
buff.append(' ');
}
}
else {
spaces = 0;
}
break;
}
switch (c) {
case '\n':
// pine treats <br> as two newlines, but <br/> as one newline. Use <br/> so our messages aren't
// doublespaced.
buff.append(HTML_NEWLINE);
isStartOfLine = true;
quotesThisLine = 0;
break;
case '&':
buff.append("&amp;");
break;
case '<':
buff.append("&lt;");
break;
case '>':
spaces = 0;
if (isStartOfLine) {
quotesThisLine++;
} else {
// We use a token here which can't occur in htmlified text because &gt; is valid
// within links (where > is not), and linkifying links will include it if we
// do it here. We'll make another pass and change this back to &gt; after
// the linkification is done.
buff.append("<gt>");
}
break;
case '\r':
break;
case ' ':
if (isStartOfLine) {
if (isStartOfLine) {
switch (c) {
case ' ':
spaces++;
}
else {
buff.append((char)c);
}
break;
default:
if (isStartOfLine) {
// Not a quote character and not a space. Content is starting now.
isStartOfLine = false;
// Add/remove blockquotes by comparing this line's quotes to the previous line's quotes.
if (quotesThisLine > quoteDepth) {
for (int i = quoteDepth; i < quotesThisLine; i++) {
buff.append(HTML_BLOCKQUOTE_START.replace(HTML_BLOCKQUOTE_COLOR_TOKEN, getQuoteColor(i + 1)));
}
} else if (quotesThisLine < quoteDepth) {
for (int i = quoteDepth; i > quotesThisLine; i--) {
buff.append(HTML_BLOCKQUOTE_END);
}
}
break;
case '>':
quotesThisLine++;
spaces = 0;
break;
case '\n':
appendbq(buff, quotesThisLine, quoteDepth);
quoteDepth = quotesThisLine;
while (spaces-- > 0) {
buff.append(' ');
}
appendsp(buff, spaces);
spaces = 0;
appendchar(buff, c);
isStartOfLine = true;
quotesThisLine = 0;
break;
default:
isStartOfLine = false;
appendbq(buff, quotesThisLine, quoteDepth);
quoteDepth = quotesThisLine;
appendsp(buff, spaces);
spaces = 0;
appendchar(buff, c);
isStartOfLine = false;
break;
}
buff.append((char)c);
}//switch
}
else {
appendchar(buff, c);
if (c == '\n') {
isStartOfLine = true;
quotesThisLine = 0;
}
}
}
} catch (IOException e) {
//Should never happen
@ -335,6 +302,54 @@ public class HtmlConverter {
return text;
}
private static void appendchar(StringBuilder buff, int c) {
switch (c) {
case '&':
buff.append("&amp;");
break;
case '<':
buff.append("&lt;");
break;
case '>':
// We use a token here which can't occur in htmlified text because &gt; is valid
// within links (where > is not), and linkifying links will include it if we
// do it here. We'll make another pass and change this back to &gt; after
// the linkification is done.
buff.append("<gt>");
break;
case '\r':
break;
case '\n':
// pine treats <br> as two newlines, but <br/> as one newline. Use <br/> so our messages aren't
// doublespaced.
buff.append(HTML_NEWLINE);
break;
default:
buff.append((char)c);
break;
}
}
private static void appendsp(StringBuilder buff, int spaces) {
while (spaces > 0) {
buff.append(' ');
spaces--;
}
}
private static void appendbq(StringBuilder buff, int quotesThisLine, int quoteDepth) {
// Add/remove blockquotes by comparing this line's quotes to the previous line's quotes.
if (quotesThisLine > quoteDepth) {
for (int i = quoteDepth; i < quotesThisLine; i++) {
buff.append(HTML_BLOCKQUOTE_START.replace(HTML_BLOCKQUOTE_COLOR_TOKEN, getQuoteColor(i + 1)));
}
} else if (quotesThisLine < quoteDepth) {
for (int i = quoteDepth; i > quotesThisLine; i--) {
buff.append(HTML_BLOCKQUOTE_END);
}
}
}
protected static final String QUOTE_COLOR_DEFAULT = "#ccc";
protected static final String QUOTE_COLOR_LEVEL_1 = "#729fcf";
protected static final String QUOTE_COLOR_LEVEL_2 = "#ad7fa8";

27
tests/src/com/fsck/k9/helper/HtmlConverterTest.java
View File

@ -36,7 +36,8 @@ public class HtmlConverterTest extends TestCase {
+ "<blockquote class=\"gmail_quote\" style=\"margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #ad7fa8; padding-left: 1ex;\">"
+ "A man, a plan...<br />"
+ "</blockquote>"
+ " Too easy!</blockquote>"
+ " Too easy!<br />"
+ "</blockquote>"
+ "<br />"
+ "Nice job :)<br />"
+ "<blockquote class=\"gmail_quote\" style=\"margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;\">"
@ -137,23 +138,33 @@ public class HtmlConverterTest extends TestCase {
public void testPreserveSpacesAtFirst() {
String message = "foo\n"
+ " bar\n"
+ " baz\n"
+ " \n"
+ " &\n"
+ " \r\n"
+ " <\n"
+ " >\n";
+ " baz\n";
String result = HtmlConverter.textToHtml(message);
writeToFile(result);
assertEquals("<pre class=\"k9mail\">"
+ "foo<br />"
+ " bar<br />"
+ " baz<br />"
+ "</pre>", result);
}
public void testPreserveSpacesAtFirstForSpecialCharacters() {
String message =
" \n"
+ " &\n"
+ " \r\n"
+ " <\n"
+ " > \n";
String result = HtmlConverter.textToHtml(message);
writeToFile(result);
assertEquals("<pre class=\"k9mail\">"
+ " <br />"
+ " &amp;<br />"
+ " <br />"
+ " &lt;<br />"
+ " &gt;<br />"
+ "<blockquote class=\"gmail_quote\" style=\"margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;\">"
+ " <br />"
+ "</blockquote>"
+ "</pre>", result);
}
}