Handles supporting application management. This is an
initial, theoretically fully functional implementation. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@919 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Tyler Dauwalder
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//----------------------------------------------------------------------
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// This software is part of the OpenBeOS distribution and is covered
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// by the OpenBeOS license.
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//---------------------------------------------------------------------
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/*!
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\file SupportingApps.h
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SupportingApps class declarations
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*/
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#ifndef _MIME_SUPPORTING_APPS_H
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#define _MIME_SUPPORTING_APPS_H
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#include <SupportDefs.h>
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#include <map>
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#include <set>
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#include <string>
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class BMessage;
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namespace BPrivate {
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namespace Storage {
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namespace Mime {
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class SupportingApps {
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public:
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SupportingApps();
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~SupportingApps();
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status_t GetSupportingApps(const char *type, BMessage *apps);
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status_t SetSupportedTypes(const char *app, const BMessage *types, bool fullSync);
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private:
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status_t AddSupportingApp(const char *type, const char *app);
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status_t RemoveSupportingApp(const char *type, const char *app);
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status_t BuildSupportingAppsTable();
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std::map<std::string, std::set<std::string> > fSupportedTypes; // app sig => set of supported types
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std::map<std::string, std::set<std::string> > fSupportingApps; // mime type => set of supporting apps
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bool fHaveDoneFullBuild;
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};
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} // namespace Mime
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} // namespace Storage
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} // namespace BPrivate
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#endif // _MIME_SUPPORTING_APPS_H
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@@ -0,0 +1,264 @@
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//----------------------------------------------------------------------
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// This software is part of the OpenBeOS distribution and is covered
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// by the OpenBeOS license.
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//---------------------------------------------------------------------
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/*!
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\file SupportingApps.cpp
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SupportingApps class implementation
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*/
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#include "mime/SupportingApps.h"
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#include <Directory.h>
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#include <Message.h>
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#include <mime/database_support.h>
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#include <MimeType.h>
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#include <Path.h>
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#include <storage_support.h>
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#include <new>
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#include <stdio.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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namespace Storage {
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namespace Mime {
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/*!
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\class SupportingApps
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\brief Supporting apps information for the entire database
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*/
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// Constructor
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//! Constructs a new SupportingApps object
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SupportingApps::SupportingApps()
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: fHaveDoneFullBuild(false)
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{
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}
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// Destructor
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//! Destroys the SupportingApps object
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SupportingApps::~SupportingApps()
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{
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}
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// GetSupportingApps
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/*! \brief Returns a list of signatures of supporting applications for the
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given type in the pre-allocated \c BMessage pointed to by \c apps.
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See \c BMimeType::GetSupportingApps(BMessage*) for more information.
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*/
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status_t
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SupportingApps::GetSupportingApps(const char *type, BMessage *apps)
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{
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status_t err = type && apps ? B_OK : B_BAD_VALUE;
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// See if we need to do our initial build still
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if (!err && !fHaveDoneFullBuild) {
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err = BuildSupportingAppsTable();
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}
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if (!err) {
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// Clear the message, as we're just going to add to it
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apps->MakeEmpty();
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BMimeType mime(type);
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err = mime.InitCheck();
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if (!err) {
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if (mime.IsSupertypeOnly()) {
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// Add the apps that support this supertype (plus their count)
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std::set<std::string> &superApps = fSupportingApps[type];
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int32 count = 0;
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std::set<std::string>::const_iterator i;
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for (i = superApps.begin(); i != superApps.end() && !err; i++) {
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err = apps->AddString(kApplicationsField, (*i).c_str());
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count++;
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}
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if (!err)
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err = apps->AddInt32(kSupportingAppsSuperCountField, count);
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} else {
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// Add the apps that support this subtype (plus their count)
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std::set<std::string> &subApps = fSupportingApps[type];
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int32 count = 0;
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std::set<std::string>::const_iterator i;
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for (i = subApps.begin(); i != subApps.end() && !err; i++) {
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err = apps->AddString(kApplicationsField, (*i).c_str());
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count++;
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}
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if (!err)
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err = apps->AddInt32(kSupportingAppsSubCountField, count);
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// Now add any apps that support the supertype, but not the
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// subtype (plus their count).
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BMimeType superMime;
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err = mime.GetSupertype(&superMime);
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if (!err)
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err = superMime.InitCheck();
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if (!err) {
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std::set<std::string> &superApps = fSupportingApps[type];
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count = 0;
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for (i = superApps.begin(); i != superApps.end() && !err; i++) {
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if (subApps.find(*i) == subApps.end()) {
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err = apps->AddString(kApplicationsField, (*i).c_str());
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count++;
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}
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}
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if (!err)
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err = apps->AddInt32(kSupportingAppsSuperCountField, count);
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}
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}
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}
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}
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return err;
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}
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// SetSupportedTypes
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/*! \brief Sets the list of supported types for the given application.
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\param app The application whose supported types you are setting
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\param types Pointer to a \c BMessage containing an array of supported
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mime types in its \c Mime::kTypesField field.
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\param fullSync If \c true, \c app is removed as a supporting application
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of any types for which it is no longer a supporting application
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as of this call to SetSupportedTypes(). If \c false, said
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mappings are not updated.
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*/
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status_t
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SupportingApps::SetSupportedTypes(const char *app, const BMessage *types, bool fullSync)
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{
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status_t err = app && types ? B_OK : B_BAD_VALUE;
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if (!fHaveDoneFullBuild)
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return err;
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std::set<std::string> oldTypes;
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std::set<std::string> &newTypes = fSupportedTypes[app];
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// Make a copy of the previous types if we're doing a full sync
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if (!err && fullSync)
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oldTypes = newTypes;
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if (!err) {
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// Read through the list of new supported types, creating the new
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// supported types list and adding the app as a supporting app for
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// each type.
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newTypes.clear();
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const char *type;
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for (int32 i = 0; types->FindString(kTypesField, &type) == B_OK; i++) {
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newTypes.insert(type);
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AddSupportingApp(type, app);
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}
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// Now, if we're doing a full sync, remove the app as a supporting
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// app for any types it no longer supports
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if (fullSync) {
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for (std::set<std::string>::iterator i = oldTypes.begin();
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i != oldTypes.end();
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i++)
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{
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if (newTypes.find(*i) == newTypes.end())
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RemoveSupportingApp((*i).c_str(), app);
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}
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}
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}
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return err;
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}
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// AddSupportingApp
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/*! \brief Adds the given application signature to the set of supporting
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apps for the given type.
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\param type The full mime type
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\param app The full application signature (i.e. "application/app-subtype")
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\return
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- B_OK: success, even if the app was already in the supporting apps list
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- "error code": failure
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*/
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status_t
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SupportingApps::AddSupportingApp(const char *type, const char *app)
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{
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status_t err = type && app ? B_OK : B_BAD_VALUE;
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if (!err)
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fSupportingApps[type].insert(app);
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return err;
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}
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// RemoveSupportingApp
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/*! \brief Removes the given application signature from the set of supporting
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apps for the given type.
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\param type The full mime type
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\param app The full application signature (i.e. "application/app-subtype")
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\return
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- B_OK: success, even if the app was not found in the supporting apps list
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- "error code": failure
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*/
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status_t
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SupportingApps::RemoveSupportingApp(const char *type, const char *app)
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{
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status_t err = app ? B_OK : B_BAD_VALUE;
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if (!err)
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fSupportingApps[type].erase(app);
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return err;
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}
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// BuildSupportingAppsTable
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/*! \brief Crawls the mime database and builds a list of supporting application
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signatures for every supported type.
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*/
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status_t
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SupportingApps::BuildSupportingAppsTable()
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{
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fSupportedTypes.clear();
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fSupportingApps.clear();
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BDirectory dir;
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status_t err = dir.SetTo(kApplicationDatabaseDir.c_str());
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// Build the supporting apps table based on the mime database
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if (!err) {
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dir.Rewind();
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// Handle each application type
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while (true) {
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entry_ref ref;
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err = dir.GetNextRef(&ref);
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if (err) {
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// If we've come to the end of list, it's not an error
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if (err == B_ENTRY_NOT_FOUND)
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err = B_OK;
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break;
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} else {
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BPath path;
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BMessage msg;
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char appSig[B_PATH_NAME_LENGTH+1];
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err = path.SetTo(&ref);
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if (!err) {
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// Construct a mime type string
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const char *appName = path.Leaf();
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sprintf(appSig, "application/%s", appName);
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// Read in the list of supported types
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if (read_mime_attr_message(appSig, kSupportedTypesAttr, &msg) == B_OK) {
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// Iterate through the supported types, adding them to the list of
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// supported types for the application and adding the application's
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// signature to the list of supporting apps for each type
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const char *type;
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std::set<std::string> &supportedTypes = fSupportedTypes[appName];
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for (int i = 0; msg.FindString(kTypesField, i, &type) == B_OK; i++) {
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supportedTypes.insert(type);
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AddSupportingApp(type, appSig);
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}
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}
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}
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}
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}
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}
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if (err)
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DBG(OUT("Mime::SupportingApps::BuildSupportingAppsTable() failed, error code == 0x%lx\n", err));
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else
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fHaveDoneFullBuild = true;
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return err;
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}
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} // namespace Mime
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} // namespace Storage
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} // namespace BPrivate
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