Initial checkin; MimeDatabase class used to handle all actual mime
database access. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@785 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Tyler Dauwalder
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// MimeDatabase.h
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#ifndef _MIME_DATABASE_H
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#define _MIME_DATABASE_H
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#include <Messenger.h>
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#include <StorageDefs.h>
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#include <string>
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#include <set>
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class BNode;
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namespace BPrivate {
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class MimeDatabase {
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public:
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MimeDatabase(const char *databaseDir = kDefaultDatabaseDir);
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~MimeDatabase();
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status_t InitCheck();
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/* These functions are for managing data in the meta mime file*/
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status_t Install(const char *type);
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status_t Delete(const char *type);
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bool IsInstalled(const char *type) const;
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// status_t GetIcon(BBitmap *icon, icon_size size) const;
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// status_t GetPreferredApp(char *signature, app_verb verb = B_OPEN) const;
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// status_t GetAttrInfo(BMessage *info) const;
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// status_t GetFileExtensions(BMessage *extensions) const;
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status_t GetShortDescription(const char *type, char *description) const;
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status_t GetLongDescription(const char *type, char *description) const;
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// status_t GetSupportingApps(BMessage *signatures) const;
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// status_t SetIcon(const BBitmap *icon, icon_size size);
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// status_t SetPreferredApp(const char *signature, app_verb verb = B_OPEN);
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// status_t SetAttrInfo(const BMessage *info);
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// status_t SetFileExtensions(const BMessage *extensions);
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status_t SetShortDescription(const char *type, const char *description);
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status_t SetLongDescription(const char *type, const char *description);
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// static status_t GetInstalledSupertypes(BMessage *super_types);
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// static status_t GetInstalledTypes(BMessage *types);
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// static status_t GetInstalledTypes(const char *super_type,
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// BMessage *subtypes);
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// static status_t GetWildcardApps(BMessage *wild_ones);
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// static bool IsValid(const char *mimeType);
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//
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// status_t GetAppHint(entry_ref *ref) const;
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// status_t SetAppHint(const entry_ref *ref);
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/* for application signatures only.*/
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// status_t GetIconForType(const char *type, BBitmap *icon,
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// icon_size which) const;
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// status_t SetIconForType(const char *type, const BBitmap *icon,
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// icon_size which);
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/* sniffer rule manipulation */
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// status_t GetSnifferRule(BString *result) const;
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// status_t SetSnifferRule(const char *);
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// static status_t CheckSnifferRule(const char *rule, BString *parseError);
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/* calls to ask the sniffer to identify the MIME type of a file or data in
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memory */
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// static status_t GuessMimeType(const entry_ref *file, BMimeType *result);
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// static status_t GuessMimeType(const void *buffer, int32 length,
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// BMimeType *result);
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// static status_t GuessMimeType(const char *filename, BMimeType *result);
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status_t StartWatching(BMessenger target);
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status_t StopWatching(BMessenger target);
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static const char* kDefaultDatabaseDir;
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private:
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ssize_t ReadMimeAttr(const char *type, const char *attr, void *data,
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size_t len, type_code datatype) const;
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status_t WriteMimeAttr(const char *type, const char *attr, const void *data,
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size_t len, type_code datatype);
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status_t OpenType(const char *type, BNode *result) const;
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status_t OpenOrCreateType(const char *type, BNode *result);
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inline std::string TypeToFilename(const char *type) const;
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status_t SendMonitorUpdate(int32 which, const char *type, const char *extraType, bool largeIcon);
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status_t SendMonitorUpdate(int32 which, const char *type, const char *extraType);
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status_t SendMonitorUpdate(int32 which, const char *type, bool largeIcon);
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status_t SendMonitorUpdate(int32 which, const char *type);
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status_t SendMonitorUpdate(BMessage &msg);
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std::string fDatabaseDir;
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status_t fCStatus;
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std::set<BMessenger> fMonitorSet;
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};
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} // namespace BPrivate
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#endif // _MIME_DATABASE_H
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@@ -0,0 +1,471 @@
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// MimeDatabase.cpp
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#include <Application.h>
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#include <Directory.h>
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#include <Entry.h>
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#include <Message.h>
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#include <MimeType.h>
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#include <Node.h>
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#include <TypeConstants.h>
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#include <ctype.h> // For tolower()
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#include <stdio.h>
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#include <string>
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#include <iostream>
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#include "MimeDatabase.h"
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//#define DBG(x) x
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#define DBG(x)
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#define OUT printf
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namespace BPrivate {
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//const char* MimeDatabase::kDefaultDatabaseDir = "/boot/home/config/settings/beos_mime";
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const char* MimeDatabase::kDefaultDatabaseDir = "/boot/home/config/settings/obos_mime";
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//! Converts every character in \c str to lowercase and returns the result
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std::string
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to_lower(const char *str) {
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if (str) {
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std::string result = "";
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for (uint i = 0; i < strlen(str); i++)
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result += tolower(str[i]);
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return result;
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} else
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return "(null)";
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}
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/*!
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\class MimeDatabase
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\brief MimeDatabase is the master of the MIME data base.
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All write and non-atomic read accesses are carried out by this class.
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\note No error checking (other than checks for NULL pointers) is performed
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by this class on the mime type strings passed to it. It's assumed
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that this sort of checking has been done beforehand.
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*/
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// constructor
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/*! \brief Creates and initializes a MimeDatabase.
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*/
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MimeDatabase::MimeDatabase(const char *databaseDir)
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: fDatabaseDir(databaseDir)
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, fCStatus(B_NO_INIT)
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{
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// Do some really minor error checking
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BEntry entry(fDatabaseDir.c_str());
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fCStatus = entry.Exists() ? B_OK : B_BAD_VALUE;
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}
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// destructor
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/*! \brief Frees all resources associated with this object.
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*/
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MimeDatabase::~MimeDatabase()
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{
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}
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// InitCheck
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/*! \brief Returns the initialization status of the object.
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\return
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- B_OK: success
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- "error code": failure
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*/
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status_t
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MimeDatabase::InitCheck()
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{
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return fCStatus;
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}
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// Install
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/*! \brief Installs the given type in the database
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\note The R5 version of this call returned an unreliable result if the
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MIME type was already installed. Ours simply returns B_OK.
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\param type Pointer to a NULL-terminated string containing the MIME type of interest
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\param decsription Pointer to a NULL-terminated string containing the new long description
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\return
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- B_OK: success
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- "error code": failure
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*/
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status_t
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MimeDatabase::Install(const char *type)
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{
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BEntry entry;
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status_t err = (type ? B_OK : B_BAD_VALUE);
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if (!err)
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err = entry.SetTo(TypeToFilename(type).c_str());
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if (!err) {
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if (entry.Exists())
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err = B_FILE_EXISTS;
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else {
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BNode node;
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err = OpenOrCreateType(type, &node);
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}
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}
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return err;
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}
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// Delete
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/*! \brief Removes the given type from the database
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\param type Pointer to a NULL-terminated string containing the MIME type of interest
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\return
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- B_OK: success
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- "error code": failure
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*/
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status_t
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MimeDatabase::Delete(const char *type)
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{
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BEntry entry;
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status_t err = (type ? B_OK : B_BAD_VALUE);
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if (!err)
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err = entry.SetTo(TypeToFilename(type).c_str());
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if (!err)
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err = entry.Remove();
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return err;
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}
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bool
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MimeDatabase::IsInstalled(const char *type) const {
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BNode node;
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return OpenType(type, &node) == B_OK;
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}
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// GetShortDescription
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//! Fetches the short description for the given MIME type.
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/*! The string pointed to by \c description must be long enough to
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hold the short description; a length of \c B_MIME_TYPE_LENGTH+1 is
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recommended.
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\param type The MIME type of interest
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\param description Pointer to a pre-allocated string into which the short
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description is copied. If the function fails, the contents
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of the string are undefined.
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\return
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- \c B_OK: Success
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- \c B_ENTRY_NOT_FOUND: No short description exists for the given type
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- "error code": Failure
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*/
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status_t
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MimeDatabase::GetShortDescription(const char *type, char *description) const {
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/// DBG(OUT("MimeDatabase::GetShortDescription()\n"));
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ssize_t err = ReadMimeAttr(type, "META:S:DESC", description, B_MIME_TYPE_LENGTH, B_RAW_TYPE);
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return err >= 0 ? B_OK : err ;
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}
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// GetLongDescription
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//! Fetches the long description for the given MIME type.
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/*! The string pointed to by \c description must be long enough to
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hold the long description; a length of \c B_MIME_TYPE_LENGTH+1 is
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recommended.
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\param type The MIME type of interest
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\param description Pointer to a pre-allocated string into which the long
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description is copied. If the function fails, the contents
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of the string are undefined.
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\return
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- \c B_OK: Success
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- \c B_ENTRY_NOT_FOUND: No long description exists for the given type
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- "error code": Failure
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*/
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status_t
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MimeDatabase::GetLongDescription(const char *type, char *description) const {
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// DBG(OUT("MimeDatabase::GetLongDescription()\n"));
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ssize_t err = ReadMimeAttr(type, "META:L:DESC", description, B_MIME_TYPE_LENGTH, B_RAW_TYPE);
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return err >= 0 ? B_OK : err ;
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}
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// SetShortDescription
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/*! \brief Sets the short description for the given MIME type
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\param type Pointer to a NULL-terminated string containing the MIME type of interest
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\param decsription Pointer to a NULL-terminated string containing the new short description
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*/
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status_t
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MimeDatabase::SetShortDescription(const char *type, const char *description)
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{
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DBG(OUT("MimeDatabase::SetShortDescription()\n"));
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status_t err = (type && description && strlen(description) < B_MIME_TYPE_LENGTH) ? B_OK : B_BAD_VALUE;
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if (!err)
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WriteMimeAttr(type, "META:S:DESC", description, strlen(description)+1, B_RAW_TYPE);
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if (!err)
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err = SendMonitorUpdate(B_SHORT_DESCRIPTION_CHANGED, type);
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return err;
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}
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// SetLongDescription
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/*! \brief Sets the long description for the given MIME type
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\param type Pointer to a NULL-terminated string containing the MIME type of interest
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\param decsription Pointer to a NULL-terminated string containing the new long description
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*/
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status_t
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MimeDatabase::SetLongDescription(const char *type, const char *description)
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{
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DBG(OUT("MimeDatabase::SetLongDescription()\n"));
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status_t err = (type && description && strlen(description) < B_MIME_TYPE_LENGTH) ? B_OK : B_BAD_VALUE;
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if (!err)
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WriteMimeAttr(type, "META:L:DESC", description, strlen(description)+1, B_RAW_TYPE);
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if (!err)
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err = SendMonitorUpdate(B_SHORT_DESCRIPTION_CHANGED, type);
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return err;
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}
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status_t
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MimeDatabase::StartWatching(BMessenger target)
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{
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DBG(OUT("MimeDatabase::StartWatching()\n"));
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status_t err = target.IsValid() ? B_OK : B_BAD_VALUE;
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if (!err)
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fMonitorSet.insert(target);
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return err;
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}
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status_t
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MimeDatabase::StopWatching(BMessenger target)
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{
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DBG(OUT("MimeDatabase::StopWatching()\n"));
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status_t err = fMonitorSet.find(target) != fMonitorSet.end() ? B_OK : B_BAD_VALUE;
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if (!err)
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||||||
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fMonitorSet.erase(target);
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return err;
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}
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||||||
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// ReadMimeAttr
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/*! \brief Reads up to \c len bytes of the given data from the given attribute
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for the given MIME type.
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||||||
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If no entry for the given type exists in the database, the function fails,
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and the contents of \c data are undefined.
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\param type The MIME type
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\param attr The attribute name
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\param data Pointer to a memory buffer into which the data should be copied
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||||||
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\param len The maximum number of bytes to read
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||||||
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\param datatype The expected data type
|
||||||
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\return If successful, the number of bytes read is returned, otherwise, an
|
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error code is returned.
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||||||
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*/
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ssize_t
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||||||
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MimeDatabase::ReadMimeAttr(const char *type, const char *attr, void *data,
|
||||||
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size_t len, type_code datatype) const
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||||||
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{
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BNode node;
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||||||
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ssize_t err = (type && attr && data ? B_OK : B_BAD_VALUE);
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||||||
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if (!err)
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||||||
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err = OpenType(type, &node);
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if (!err)
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||||||
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err = node.ReadAttr(attr, datatype, 0, data, len);
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return err;
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||||||
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}
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||||||
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||||||
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|
||||||
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// WriteMimeAttr
|
||||||
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/*! \brief Writes \c len bytes of the given data to the given attribute
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for the given MIME type.
|
||||||
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|
||||||
|
If no entry for the given type exists in the database, it is created.
|
||||||
|
|
||||||
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\param type The MIME type
|
||||||
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\param attr The attribute name
|
||||||
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\param data Pointer to the data to write
|
||||||
|
\param len The number of bytes to write
|
||||||
|
\param datatype The data type of the given data
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::WriteMimeAttr(const char *type, const char *attr, const void *data,
|
||||||
|
size_t len, type_code datatype)
|
||||||
|
{
|
||||||
|
BNode node;
|
||||||
|
status_t err = (type && attr && data ? B_OK : B_BAD_VALUE);
|
||||||
|
if (!err)
|
||||||
|
err = OpenOrCreateType(type, &node);
|
||||||
|
if (!err) {
|
||||||
|
ssize_t bytes = node.WriteAttr(attr, datatype, 0, data, len);
|
||||||
|
if (bytes < B_OK)
|
||||||
|
err = bytes;
|
||||||
|
else
|
||||||
|
err = (bytes != len ? B_FILE_ERROR : B_OK);
|
||||||
|
}
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
// OpenType
|
||||||
|
/*! \brief Opens a BNode on the given type, failing if the type has no
|
||||||
|
corresponding file in the database.
|
||||||
|
\param type The MIME type to open
|
||||||
|
\param result Pointer to a pre-allocated BNode into which
|
||||||
|
is opened on the given MIME type
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::OpenType(const char *type, BNode *result) const
|
||||||
|
{
|
||||||
|
status_t err = (type && result ? B_OK : B_BAD_VALUE);
|
||||||
|
if (!err)
|
||||||
|
err = result->SetTo(TypeToFilename(type).c_str());
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
// OpenOrCreateType
|
||||||
|
/*! \brief Opens a BNode on the given type, creating a node of the
|
||||||
|
appropriate flavor if necessary.
|
||||||
|
|
||||||
|
All MIME types are converted to lowercase for use in the filesystem.
|
||||||
|
\param type The MIME type to open
|
||||||
|
\param result Pointer to a pre-allocated BNode into which
|
||||||
|
is opened on the given MIME type
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::OpenOrCreateType(const char *type, BNode *result)
|
||||||
|
{
|
||||||
|
std::string filename;
|
||||||
|
std::string typeLower = to_lower(type);
|
||||||
|
status_t err = (type && result ? B_OK : B_BAD_VALUE);
|
||||||
|
if (!err) {
|
||||||
|
filename = TypeToFilename(type);
|
||||||
|
err = result->SetTo(filename.c_str());
|
||||||
|
}
|
||||||
|
if (err == B_ENTRY_NOT_FOUND) {
|
||||||
|
// Figure out what type of node we need to create
|
||||||
|
// + Supertype == directory
|
||||||
|
// + Non-supertype == file
|
||||||
|
int32 pos = typeLower.find_first_of('/');
|
||||||
|
if (pos == std::string::npos) {
|
||||||
|
// Supertype == directory
|
||||||
|
BDirectory parent(fDatabaseDir.c_str());
|
||||||
|
err = parent.InitCheck();
|
||||||
|
if (!err)
|
||||||
|
err = parent.CreateDirectory(typeLower.c_str(), NULL);
|
||||||
|
} else {
|
||||||
|
// Non-supertype == file
|
||||||
|
std::string super(typeLower, 0, pos);
|
||||||
|
std::string sub(typeLower, pos+1);
|
||||||
|
BDirectory parent((fDatabaseDir + "/" + super).c_str());
|
||||||
|
err = parent.InitCheck();
|
||||||
|
if (!err)
|
||||||
|
err = parent.CreateFile(sub.c_str(), NULL);
|
||||||
|
}
|
||||||
|
// Now try opening again
|
||||||
|
err = result->SetTo(filename.c_str());
|
||||||
|
}
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
inline
|
||||||
|
std::string
|
||||||
|
MimeDatabase::TypeToFilename(const char *type) const
|
||||||
|
{
|
||||||
|
return fDatabaseDir + "/" + to_lower(type);
|
||||||
|
}
|
||||||
|
|
||||||
|
// SendMonitorUpdate
|
||||||
|
/*! \brief Sends an update notification to all BMessengers that have
|
||||||
|
subscribed to the MIME Monitor service
|
||||||
|
\param type The MIME type that was updated
|
||||||
|
\param which Bitmask describing which attribute was updated
|
||||||
|
\param extraType The MIME type to which the change is applies
|
||||||
|
\param largeIcon \true if the the large icon was updated, \false if the
|
||||||
|
small icon was updated
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::SendMonitorUpdate(int32 which, const char *type, const char *extraType, bool largeIcon) {
|
||||||
|
BMessage msg(B_META_MIME_CHANGED);
|
||||||
|
status_t err;
|
||||||
|
|
||||||
|
err = msg.AddInt32("be:which", which);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddString("be:type", type);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddString("be:extra_type", extraType);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddBool("be:large_icon", largeIcon);
|
||||||
|
if (!err)
|
||||||
|
err = SendMonitorUpdate(msg);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
// SendMonitorUpdate
|
||||||
|
/*! \brief Sends an update notification to all BMessengers that have
|
||||||
|
subscribed to the MIME Monitor service
|
||||||
|
\param type The MIME type that was updated
|
||||||
|
\param which Bitmask describing which attribute was updated
|
||||||
|
\param extraType The MIME type to which the change is applies
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::SendMonitorUpdate(int32 which, const char *type, const char *extraType) {
|
||||||
|
BMessage msg(B_META_MIME_CHANGED);
|
||||||
|
status_t err;
|
||||||
|
|
||||||
|
err = msg.AddInt32("be:which", which);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddString("be:type", type);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddString("be:extra_type", extraType);
|
||||||
|
if (!err)
|
||||||
|
err = SendMonitorUpdate(msg);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
// SendMonitorUpdate
|
||||||
|
/*! \brief Sends an update notification to all BMessengers that have
|
||||||
|
subscribed to the MIME Monitor service
|
||||||
|
\param type The MIME type that was updated
|
||||||
|
\param which Bitmask describing which attribute was updated
|
||||||
|
\param largeIcon \true if the the large icon was updated, \false if the
|
||||||
|
small icon was updated
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::SendMonitorUpdate(int32 which, const char *type, bool largeIcon) {
|
||||||
|
BMessage msg(B_META_MIME_CHANGED);
|
||||||
|
status_t err;
|
||||||
|
|
||||||
|
err = msg.AddInt32("be:which", which);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddString("be:type", type);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddBool("be:large_icon", largeIcon);
|
||||||
|
if (!err)
|
||||||
|
err = SendMonitorUpdate(msg);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
// SendMonitorUpdate
|
||||||
|
/*! \brief Sends an update notification to all BMessengers that have
|
||||||
|
subscribed to the MIME Monitor service
|
||||||
|
\param type The MIME type that was updated
|
||||||
|
\param which Bitmask describing which attribute was updated
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::SendMonitorUpdate(int32 which, const char *type) {
|
||||||
|
BMessage msg(B_META_MIME_CHANGED);
|
||||||
|
status_t err;
|
||||||
|
|
||||||
|
err = msg.AddInt32("be:which", which);
|
||||||
|
if (!err)
|
||||||
|
err = msg.AddString("be:type", type);
|
||||||
|
if (!err)
|
||||||
|
err = SendMonitorUpdate(msg);
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
// SendMonitorUpdate
|
||||||
|
/*! \brief Sends an update notification to all BMessengers that have subscribed to
|
||||||
|
the MIME Monitor service
|
||||||
|
\param BMessage A preformatted MIME monitor message to be sent to all subscribers
|
||||||
|
*/
|
||||||
|
status_t
|
||||||
|
MimeDatabase::SendMonitorUpdate(BMessage &msg) {
|
||||||
|
DBG(OUT("MimeDatabase::SendMonitorUpdate(BMessage&)\n"));
|
||||||
|
std::set<BMessenger>::const_iterator i;
|
||||||
|
for (i = fMonitorSet.begin(); i != fMonitorSet.end(); i++) {
|
||||||
|
status_t err = (*i).SendMessage(&msg, (BHandler*)NULL);
|
||||||
|
if (err)
|
||||||
|
DBG(OUT("MimeDatabase::SendMonitorUpdate(BMessage&): BMessenger::SendMessage failed, 0x%x\n", err));
|
||||||
|
}
|
||||||
|
DBG(OUT("MimeDatabase::SendMonitorUpdate(BMessage&) done\n"));
|
||||||
|
return B_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
} // namespace BPrivate
|
||||||
Reference in New Issue
Block a user