|
|
| version 1.32.2.4, 2003/03/06 15:32:37 | version 1.39.14.1, 2005/08/05 13:03:00 |
|---|---|
| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: Stylesheet connection decl. | Parser: Stylesheet connection decl. |
| Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| */ | */ |
| #ifndef PA_STYLESHEET_CONNECTION_H | #ifndef PA_STYLESHEET_CONNECTION_H |
| #define PA_STYLESHEET_CONNECTION_H | #define PA_STYLESHEET_CONNECTION_H |
| static const char* IDENT_STYLESHEET_CONNECTION_H="$Date$"; | static const char * const IDENT_STYLESHEET_CONNECTION_H="$Date$"; |
| #include "libxslt/xslt.h" | #include "libxslt/xslt.h" |
| #include "libxslt/xsltInternals.h" | #include "libxslt/xsltInternals.h" |
| #include "pa_pool.h" | |
| #include "pa_stylesheet_manager.h" | #include "pa_xml_exception.h" |
| #include "pa_exception.h" | |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_globals.h" | #include "pa_globals.h" |
| #include "pa_xml_io.h" | |
| // defines | // defines |
| #define STYLESHEET_FILENAME_STAMP_SUFFIX ".stamp" | |
| /** Connection with stylesheet: | /** Connection with stylesheet: |
| remembers time and can figure out that it needs recompilation | remembers time and can figure out that it needs recompilation |
| */ | */ |
| class Stylesheet_connection: public PA_Object { | class Stylesheet_connection: public PA_Object { |
| friend class Stylesheet_connection_ptr; | |
| private: | private: |
| StringPtr ffile_spec; | String::Body ffile_spec; |
| xsltStylesheet *fstylesheet; | xsltStylesheet *fstylesheet; |
| HashStringBool* dependencies; | |
| time_t time_used; | time_t time_used; |
| time_t prev_disk_time; | time_t prev_disk_time; |
| public: | public: |
| Stylesheet_connection(StringPtr afile_spec): | Stylesheet_connection(String::Body afile_spec): |
| ffile_spec(afile_spec), | ffile_spec(afile_spec), |
| prev_disk_time(0), | |
| fstylesheet(0), | fstylesheet(0), |
| time_used(0) {} | dependencies(0), |
| time_used(0), | |
| prev_disk_time(0), | |
| used(0) | |
| {} | |
| StringPtr file_spec() { return ffile_spec; } | String::Body file_spec() { return ffile_spec; } |
| bool uncachable() { | |
| return !dependencies/*means they were external*/; | |
| } | |
| bool expired(time_t older_dies) { | bool expired(time_t older_dies) { |
| return references()==1/*!used*/ && time_used<older_dies; | return uncachable() || !used && time_used<older_dies; |
| } | } |
| time_t get_time_used() { return time_used; } | time_t get_time_used() { return time_used; } |
| Line 55 public: | Line 64 public: |
| bool connected() { return fstylesheet!=0; } | bool connected() { return fstylesheet!=0; } |
| xsltStylesheet *stylesheet(bool nocache) { | xsltStylesheet *stylesheet() { |
| time_t new_disk_time=get_new_disk_time(); | time_t new_disk_time=0; |
| if(nocache || new_disk_time) | if(uncachable() || (new_disk_time=get_new_disk_time())) |
| load(new_disk_time); | load(new_disk_time); |
| return fstylesheet; | return fstylesheet; |
| } | } |
| Line 65 public: | Line 74 public: |
| private: | private: |
| /// return to cache | /// return to cache |
| void close() { | void close(); |
| stylesheet_manager.close_connection(ffile_spec, *this); | |
| } | |
| private: | private: |
| Line 76 private: | Line 83 private: |
| return now_disk_time>prev_disk_time?now_disk_time:0; | return now_disk_time>prev_disk_time?now_disk_time:0; |
| } | } |
| void load(time_t new_disk_time) { | void load(time_t new_disk_time); |
| int saved=xmlDoValidityCheckingDefaultValue;// | time_t get_disk_time(); |
| xmlDoValidityCheckingDefaultValue=0;// | |
| xsltStylesheet *nstylesheet= | |
| xsltParseStylesheetFile(BAD_CAST ffile_spec->cstr(String::UL_FILE_SPEC).get()); | |
| xmlDoValidityCheckingDefaultValue = saved;// | |
| if(xmlHaveGenericErrors()) { | |
| GdomeException exc=0; | |
| throw Exception(ffile_spec, exc); | |
| } | |
| if(!nstylesheet) | |
| throw Exception("file.missing", | |
| ffile_spec, | |
| "stylesheet failed to load"); | |
| xsltFreeStylesheet(fstylesheet); | |
| fstylesheet=nstylesheet; | |
| prev_disk_time=new_disk_time; | |
| } | |
| time_t get_disk_time() { | |
| size_t size; | |
| time_t atime, mtime, ctime; | |
| StringPtr stamp_file_spec(ffile_spec); | |
| *stamp_file_spec << STYLESHEET_FILENAME_STAMP_SUFFIX; | |
| // {file_spec}.stamp modification time OR {file_spec} | |
| StringPtr stat_file_spec=file_readable(stamp_file_spec)?stamp_file_spec:ffile_spec; | |
| file_stat(stat_file_spec, | |
| size, | |
| atime, mtime, ctime, | |
| true/*exception on error*/); | |
| return mtime; | |
| } | |
| void touch() { | private: // connection usage methods |
| int used; | |
| void use() { | |
| time_used=time(0); // they started to use at this time | time_used=time(0); // they started to use at this time |
| used++; | |
| } | |
| void unuse() { | |
| used--; | |
| if(!used) | |
| close(); | |
| } | } |
| }; | }; |
| DECLARE_OBJECT_PTR(Stylesheet_connection); | /// Auto-object used to track Stylesheet_connection usage |
| class Stylesheet_connection_ptr { | |
| Stylesheet_connection *fconnection; | |
| public: | |
| explicit Stylesheet_connection_ptr(Stylesheet_connection *aconnection) : | |
| fconnection(aconnection) { | |
| fconnection->use(); | |
| } | |
| ~Stylesheet_connection_ptr() { | |
| fconnection->unuse(); | |
| } | |
| Stylesheet_connection* operator->() { | |
| return fconnection; | |
| } | |
| /* Stylesheet_connection& operator*() { | |
| return *fconnection; | |
| }*/ | |
| // copying | |
| Stylesheet_connection_ptr(const Stylesheet_connection_ptr& src) : fconnection(src.fconnection) { | |
| fconnection->use(); | |
| } | |
| Stylesheet_connection_ptr& operator =(const Stylesheet_connection_ptr& src) { | |
| // may do without this=src check | |
| fconnection->unuse(); | |
| fconnection=src.fconnection; | |
| fconnection->use(); | |
| return *this; | |
| } | |
| }; | |
| #endif | #endif |