Annotation of parser3/src/include/pa_stylesheet_connection.h, revision 1.29
1.1 parser 1: /** @file
1.7 parser 2: Parser: Stylesheet connection decl.
1.1 parser 3:
1.25 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.26 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 parser 6: */
7:
8: #ifndef PA_STYLESHEET_CONNECTION_H
9: #define PA_STYLESHEET_CONNECTION_H
1.29 ! paf 10:
! 11: static const char* IDENT_STYLESHEET_CONNECTION_H="$Id: zzz $";
1.1 parser 12:
1.22 paf 13: #include "libxslt/xslt.h"
1.18 paf 14: #include "libxslt/xsltInternals.h"
15:
1.1 parser 16: #include "pa_pool.h"
1.14 parser 17: #include "pa_stylesheet_manager.h"
1.1 parser 18: #include "pa_exception.h"
19: #include "pa_common.h"
1.9 parser 20:
1.1 parser 21: // defines
22:
23: #define STYLESHEET_FILENAME_STAMP_SUFFIX ".stamp"
24:
25: /** Connection with stylesheet:
26: remembers time and can figure out that it needs recompilation
27: */
28: class Stylesheet_connection : public Pooled {
29:
1.19 paf 30: friend class Stylesheet_connection_ptr;
31:
1.1 parser 32: public:
33:
34: Stylesheet_connection(Pool& pool, const String& afile_spec) : Pooled(pool),
35: ffile_spec(afile_spec),
36: prev_disk_time(0),
1.3 parser 37: fservices_pool(0),
1.19 paf 38: fstylesheet(0),
39: time_used(0), used(0) {
1.1 parser 40: }
41:
42: const String& file_spec() { return ffile_spec; }
43:
44: void set_services(Pool *aservices_pool) {
45: fservices_pool=aservices_pool;
46: }
47: bool expired(time_t older_dies) {
1.19 paf 48: return !used && time_used<older_dies;
1.1 parser 49: }
1.15 paf 50: time_t get_time_used() { return time_used; }
1.1 parser 51:
52: void disconnect() {
1.18 paf 53: xsltFreeStylesheet(fstylesheet); fstylesheet=0;
1.1 parser 54: }
55:
56: bool connected() { return fstylesheet!=0; }
57:
1.18 paf 58: xsltStylesheet *stylesheet(bool nocache) {
1.6 parser 59: time_t new_disk_time=get_new_disk_time();
60: if(nocache || new_disk_time)
1.1 parser 61: load(new_disk_time);
1.18 paf 62: return fstylesheet;
1.1 parser 63: }
64:
65: private:
66:
1.19 paf 67: /// return to cache
68: void close() {
69: stylesheet_manager->close_connection(ffile_spec, *this);
70: }
71:
72: private:
73:
1.1 parser 74: time_t get_new_disk_time() {
75: time_t now_disk_time=get_disk_time();
76: return now_disk_time>prev_disk_time?now_disk_time:0;
77: }
78:
79: void load(time_t new_disk_time) {
80: Pool& pool=*fservices_pool;
81:
1.24 paf 82: xsltStylesheet *nstylesheet=
83: xsltParseStylesheetFile(BAD_CAST ffile_spec.cstr(String::UL_FILE_SPEC));
1.28 paf 84: if(xmlHaveGenericErrors()) {
1.20 paf 85: GdomeException exc=0;
1.28 paf 86: throw Exception(&ffile_spec, exc);
87: }
88: if(!nstylesheet)
89: throw Exception("file.missing",
1.18 paf 90: &ffile_spec,
1.28 paf 91: "stylesheet failed to load");
1.1 parser 92:
1.18 paf 93: xsltFreeStylesheet(fstylesheet);
94: fstylesheet=nstylesheet;
1.1 parser 95: prev_disk_time=new_disk_time;
96: }
97:
98: time_t get_disk_time() {
99: size_t size;
100: time_t atime, mtime, ctime;
1.27 paf 101: String stamp_file_spec(ffile_spec);
1.1 parser 102: stamp_file_spec << STYLESHEET_FILENAME_STAMP_SUFFIX;
1.3 parser 103: // {file_spec}.stamp modification time OR {file_spec}
104: const String& stat_file_spec=file_readable(stamp_file_spec)?stamp_file_spec:ffile_spec;
1.14 parser 105: file_stat(stat_file_spec,
1.1 parser 106: size,
107: atime, mtime, ctime,
1.14 parser 108: true/*exception on error*/);
1.1 parser 109: return mtime;
110: }
111:
1.19 paf 112: private: // connection usage methods
113:
114: void use() {
115: time_used=time(0); // they started to use at this time
116: used++;
117: }
118: void unuse() {
119: used--;
120: if(!used)
121: close();
122: }
123:
124: private: // connection usage data
125:
126: int used;
127:
1.1 parser 128: private:
129:
130: const String& ffile_spec;
1.18 paf 131: xsltStylesheet *fstylesheet;
1.1 parser 132: time_t time_used;
133: time_t prev_disk_time;
134:
135: private:
136:
137: Pool *fservices_pool;
1.14 parser 138:
139: private:
140: void *malloc(size_t size) { return fservices_pool->malloc(size); }
141: void *calloc(size_t size) { return fservices_pool->calloc(size); }
1.19 paf 142: };
143:
144: /// Auto-object used to track Stylesheet_connection usage
145: class Stylesheet_connection_ptr {
146: Stylesheet_connection *fconnection;
147: public:
148: explicit Stylesheet_connection_ptr(Stylesheet_connection *aconnection) :
149: fconnection(aconnection) {
150: fconnection->use();
151: }
152: ~Stylesheet_connection_ptr() {
153: fconnection->unuse();
154: }
155: Stylesheet_connection* operator->() {
156: return fconnection;
157: }
158:
159: // copying
160: Stylesheet_connection_ptr(const Stylesheet_connection_ptr& src) : fconnection(src.fconnection) {
161: fconnection->use();
162: }
163: Stylesheet_connection_ptr& operator =(const Stylesheet_connection_ptr& src) {
164: // may do without this=src check
165: fconnection->unuse();
166: fconnection=src.fconnection;
167: fconnection->use();
168:
169: return *this;
170: }
1.1 parser 171: };
172:
173: #endif
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to pa_stylesheet_connection.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / include