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Reimplementation of [RTFHandler parseFontTable]

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This commit is contained in:
Javier Amor García
2015-11-09 07:59:13 +01:00
parent f64b324133
commit fa4d3a0e20
1 changed files with 214 additions and 66 deletions
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280
OpenChange/RTFHandler.m
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@@ -29,6 +29,8 @@
#define ADVANCE_N(N) _bytes += (N); _current_pos += (N);
#define REWIND _bytes--; _current_pos--;
#define DEFAULT_CHARSET 1
#define FONTNAME_LEN_MAX 100
//
// Charset definitions. See http://msdn.microsoft.com/en-us/goglobal/bb964654 for all details.
@@ -282,6 +284,7 @@ const unsigned short ansicpg874[256] = {
{
}
return self;
}
@@ -332,6 +335,23 @@ const unsigned short ansicpg874[256] = {
return NSMapGet(fontInfos, key);
}
- (NSString *) description
{
NSMutableString *description;
NSEnumerator *enumerator;
RTFFontInfo *fontInfo;
description = [NSMutableString stringWithFormat: @"Number of fonts: %u\n", [fontInfos count]];
enumerator = [fontInfos objectEnumerator];
while ((fontInfo = [enumerator nextObject]))
{
[description appendString: [fontInfo description]];
[description appendString: @"\n"];
}
return description;
}
@end
//
@@ -455,6 +475,87 @@ const unsigned short ansicpg874[256] = {
return start+1;
}
- (const char *) parseControlWordAndSetLenIn: (unsigned int *) len
setHasIntArgumentIn: (BOOL *) hasArg
setIntArgumentIn: (int *) arg
{
const char *start;
const char *end = NULL;
const char *startArg = NULL;
const char *endArg = NULL;
ADVANCE;
start = _bytes;
/*
A control word is defined by:
\<ASCII Letter Sequence><Delimiter>
*/
while (isalpha(*_bytes))
{
end = _bytes;
ADVANCE;
}
if (end == NULL)
{
return NULL;
}
/*
The <Delimiter> can be one of the following:
- A space. This serves only to delimit a control word and is
ignored in subsequent processing.
- A numeric digit or an ASCII minus sign (-), which indicates
that a numeric parameter is associated with the control word.
Only this case requires to include it in the control word.
- Any character other than a letter or a digit
*/
if (*_bytes == '-' || isdigit(*_bytes))
{
startArg = _bytes;
endArg = _bytes;
ADVANCE;
while (isdigit(*_bytes))
{
endArg = _bytes;
ADVANCE;
}
}
*hasArg = NO;
*arg = 0;
if (startArg)
{
NSString *s;
unsigned int argLength = endArg - startArg + 1;
// the next guard is to protect against a single '-'
if (argLength > 1 || (*startArg != '-'))
{
s = [[NSString alloc] initWithBytesNoCopy: (void *) startArg
length: argLength
encoding: NSASCIIStringEncoding
freeWhenDone: NO];
[s autorelease];
*hasArg = YES;
*arg = [s intValue]; // Warning: it does not detect conversion errors
}
}
/* In other cases, the delimiting character terminates the control
word and is not part of the control word. */
*len = end - start + 1;
return start;
}
//
// {\colortbl\red0\green0\blue0;\red128\green0\blue0;\red255\green0\blue0;}
@@ -531,107 +632,154 @@ const unsigned short ansicpg874[256] = {
//
- (RTFFontTable *) parseFontTable
{
NSMutableString *fontName;
RTFFontTable *fontTable;
RTFFontInfo *fontInfo;
unsigned int count;
unsigned int level;
fontTable = [[[RTFFontTable alloc] init] autorelease];
fontName = nil;
fontInfo = nil;
count = 0;
level = 0;
do
{
if (*_bytes == '{')
{
if (fontTable)
if (fontTable && level == 1)
{
fontInfo = [[[RTFFontInfo alloc] init] autorelease];
fontName = [[[NSMutableString alloc] init] autorelease];
}
ADVANCE;
count++;
level++;
}
else if (*_bytes == '}')
{
if (fontTable) //&& ![NSAllMapTableValues(fontTable->fontInfos) containsObject: fontInfo])
if (fontTable && level == 2) //&& ![NSAllMapTableValues(fontTable->fontInfos) containsObject: fontInfo])
{
ASSIGN(fontInfo->name, fontName);
[fontTable addFontInfo: fontInfo atIndex: fontInfo->index];
}
ADVANCE;
count--;
level--;
}
else if (*_bytes == '\\')
{
const char *cw;
unsigned int len;
NSString *s;
BOOL hasArg;
int arg;
cw = [self parseControlWord: &len];
// Skip our control word
if (strncmp((const char*)cw, "fonttbl", len) == 0)
cw = [self parseControlWordAndSetLenIn: &len
setHasIntArgumentIn: &hasArg
setIntArgumentIn: &arg];
if (level != 2)
continue;
else if (cw == NULL)
continue;
// We must at least parse <fontnum><fontfamily><fcharset>
s = [[NSString alloc] initWithBytesNoCopy: (void *)cw+1
length: len-1
encoding: NSASCIIStringEncoding
freeWhenDone: NO];
[s autorelease];
// If we got a fontnum, let's parse all three fields at once)
if (isdigit(*(cw+1)))
if (len == 1)
{
fontInfo->index = [s intValue];
// We now parse <fontfamily><fcharset>
cw = [self parseControlWord: &len];
if (len == 0) // Possibly parsing a space
cw = [self parseControlWord: &len];
fontInfo->family = [[NSString alloc] initWithBytesNoCopy: (void *)cw+1
length: len-1
encoding: NSASCIIStringEncoding
freeWhenDone: NO];
cw = [self parseControlWord: &len];
if (len == 0) // Possibly parsing a space
cw = [self parseControlWord: &len];
fontInfo->charset = [[NSString alloc] initWithBytesNoCopy: (void *)cw+1
length: len-1
encoding: NSASCIIStringEncoding
freeWhenDone: NO];
// We now skip everything until we find our final group closer ('}')
int cc = 1;
do
if (strncmp((const char*) cw, "f", len) == 0)
{
if (*_bytes == '{')
cc++;
if (*_bytes == '}')
cc--;
ADVANCE;
if (hasArg)
fontInfo->index = arg;
}
while (cc != 0);
// move back our buffer;
REWIND;
}
}
else
else if (len == 4)
{
if (strncmp((const char*) cw, "fnil", len) == 0)
{
fontInfo->family = @"nil";
}
else if (strncmp((const char*) cw, "fprq", len) == 0)
{
if (hasArg)
fontInfo->pitch = arg;
}
}
else if (len == 5)
{
if (strncmp((const char*) cw, "fbidi", len) == 0)
{
fontInfo->family = @"bidi";
}
else if (strncmp((const char*) cw, "ftech", len) == 0)
{
fontInfo->family = @"tech";
}
}
else if (len == 6)
{
if (strncmp((const char*) cw, "froman", len) == 0)
{
fontInfo->family = @"roman";
}
else if (strncmp((const char*) cw, "fswiss", len) == 0)
{
fontInfo->family = @"swiss";
}
else if (strncmp((const char*) cw, "fdecor", len) == 0)
{
fontInfo->family = @"decor";
}
}
else if (len == 7)
{
if (strncmp((const char*) cw, "fmodern", len) == 0)
{
fontInfo->family = @"modern";
}
}
else if (len == 8)
{
if (strncmp((const char* ) cw, "fcharset", len) == 0)
{
if (hasArg)
fontInfo->charset = [[NSString alloc] initWithFormat: @"%i", arg];
}
else if (strncmp((const char*) cw, "fscript", len) == 0)
{
fontInfo->family = @"fscript";
}
}
}
else // no char
{
if (isalnum(*_bytes))
[fontName appendFormat: @"%c", *_bytes];
if (level == 2 && isalnum(*_bytes))
{
// we assume this is the fontname
unsigned int fontnameLen;
const char *delim = strpbrk(_bytes, ";{}\\");
if (delim == NULL)
{
// no delimiter found, we skip to next characters
ADVANCE;
continue;
}
fontnameLen = delim - _bytes;
// only valid if the delimiter is a correct ';'
if (*delim == ';')
{
// there is no explicit limit length but we took 100
// as protection
if (delim && fontnameLen <= FONTNAME_LEN_MAX)
{
fontInfo->name = [[NSString alloc] initWithBytesNoCopy: (char *) _bytes
length: fontnameLen
encoding: NSASCIIStringEncoding
freeWhenDone: NO];
ADVANCE_N(fontnameLen);
}
}
else {
// advance just before the special character
ADVANCE_N(fontnameLen - 1);
}
}
ADVANCE;
}
} while (count != 0);
}
} while (level > 0);
return fontTable;
}
@@ -791,7 +939,7 @@ const unsigned short ansicpg874[256] = {
REWIND;
}
else if (strncmp(cw, "stylesheet", 10) == 0)
{
{
_bytes = cw-2;
_current_pos -= 12; // Length: {\stylesheet
[self parseStyleSheet];