DesktopPoseView.cpp

/*
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Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks
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All rights reserved.
*/

//	DesktopPoseView adds support for displaying integrated desktops
//	from multiple volumes to BPoseView
//
//	Used by the Desktop window and by the root view in file panels

#include "DesktopPoseView.h"

#include <NodeMonitor.h>
#include <Path.h>
#include <Volume.h>
#include <VolumeRoster.h>

#include "Commands.h"
#include "FSUtils.h"
#include "PoseList.h"
#include "Tracker.h"
#include "TrackerSettings.h"
#include "TrackerString.h"


//	#pragma mark -


DesktopPoseView::DesktopPoseView(Model* model, BRect frame, uint32 viewMode,
	uint32 resizeMask)
	:
	BPoseView(model, frame, viewMode, resizeMask)
{
	SetFlags(Flags() | B_DRAW_ON_CHILDREN);
}


EntryListBase*
DesktopPoseView::InitDesktopDirentIterator(BPoseView* nodeMonitoringTarget,
	const entry_ref* ref)
{
	// the desktop dirent iterator knows how to iterate over all the volumes,
	// integrated onto the desktop

	Model sourceModel(ref, false, true);
	if (sourceModel.InitCheck() != B_OK)
		return NULL;

	CachedEntryIteratorList* result = new CachedEntryIteratorList();

	ASSERT(!sourceModel.IsQuery());
	ASSERT(sourceModel.Node());
	BDirectory* sourceDirectory
		= dynamic_cast<BDirectory*>(sourceModel.Node());

	ASSERT(sourceDirectory);

	// build an iterator list, start with boot
	EntryListBase* perDesktopIterator
		= new CachedDirectoryEntryList(*sourceDirectory);

	result->AddItem(perDesktopIterator);
	if (nodeMonitoringTarget) {
		TTracker::WatchNode(sourceModel.NodeRef(),
			B_WATCH_DIRECTORY | B_WATCH_NAME | B_WATCH_STAT | B_WATCH_ATTR,
			nodeMonitoringTarget);
	}

	if (result->Rewind() != B_OK) {
		delete result;
		if (nodeMonitoringTarget)
			nodeMonitoringTarget->HideBarberPole();

		return NULL;
	}

	return result;
}


EntryListBase*
DesktopPoseView::InitDirentIterator(const entry_ref* ref)
{
	return InitDesktopDirentIterator(this, ref);
}


bool
DesktopPoseView::FSNotification(const BMessage* message)
{
	switch (message->FindInt32("opcode")) {
		case B_DEVICE_MOUNTED:
		{
			dev_t device;
			if (message->FindInt32("new device", &device) != B_OK)
				break;

			ASSERT(TargetModel());
			TrackerSettings settings;

			BVolume volume(device);
			if (volume.InitCheck() != B_OK)
				break;

			if (settings.MountVolumesOntoDesktop()
				&& (!volume.IsShared()
					|| settings.MountSharedVolumesOntoDesktop())) {
				// place an icon for the volume onto the desktop
				CreateVolumePose(&volume, true);
			}
		}
		break;
	}

	return _inherited::FSNotification(message);
}


bool
DesktopPoseView::AddPosesThreadValid(const entry_ref*) const
{
	return true;
}


void
DesktopPoseView::AddPosesCompleted()
{
	_inherited::AddPosesCompleted();
	CreateTrashPose();
}


bool
DesktopPoseView::Represents(const node_ref* ref) const
{
	// When the Tracker is set up to integrate non-boot beos volumes,
	// it represents the home/Desktop folders of all beos volumes

	return _inherited::Represents(ref);
}


bool
DesktopPoseView::Represents(const entry_ref* ref) const
{
	BEntry entry(ref);
	node_ref nref;
	entry.GetNodeRef(&nref);
	return Represents(&nref);
}


void
DesktopPoseView::ShowVolumes(bool visible, bool showShared)
{
	if (LockLooper()) {
		SavePoseLocations();
		if (!visible)
			RemoveRootPoses();
		else
			AddRootPoses(true, showShared);
		UnlockLooper();
	}
}


void
DesktopPoseView::StartSettingsWatch()
{
	be_app->LockLooper();
	be_app->StartWatching(this, kShowDisksIconChanged);
	be_app->StartWatching(this, kVolumesOnDesktopChanged);
	be_app->StartWatching(this, kDesktopIntegrationChanged);
	be_app->UnlockLooper();
}


void
DesktopPoseView::StopSettingsWatch()
{
	be_app->LockLooper();
	be_app->StopWatching(this, kShowDisksIconChanged);
	be_app->StopWatching(this, kVolumesOnDesktopChanged);
	be_app->StopWatching(this, kDesktopIntegrationChanged);
	be_app->UnlockLooper();
}


void
DesktopPoseView::AdaptToVolumeChange(BMessage* message)
{
	TTracker* tracker = dynamic_cast<TTracker*>(be_app);
	if (!tracker)
		return;

	bool showDisksIcon = false;
	bool mountVolumesOnDesktop = true;
	bool mountSharedVolumesOntoDesktop = false;

	message->FindBool("ShowDisksIcon", &showDisksIcon);
	message->FindBool("MountVolumesOntoDesktop", &mountVolumesOnDesktop);
	message->FindBool("MountSharedVolumesOntoDesktop",
		&mountSharedVolumesOntoDesktop);

	BEntry entry("/");
	Model model(&entry);
	if (model.InitCheck() == B_OK) {
		BMessage entryMessage;
		entryMessage.what = B_NODE_MONITOR;

		if (showDisksIcon)
			entryMessage.AddInt32("opcode", B_ENTRY_CREATED);
		else {
			entryMessage.AddInt32("opcode", B_ENTRY_REMOVED);
			entry_ref ref;
			if (entry.GetRef(&ref) == B_OK) {
				BContainerWindow* disksWindow
					= tracker->FindContainerWindow(&ref);
				if (disksWindow) {
					disksWindow->Lock();
					disksWindow->Close();
				}
			}
		}
		entryMessage.AddInt32("device", model.NodeRef()->device);
		entryMessage.AddInt64("node", model.NodeRef()->node);
		entryMessage.AddInt64("directory", model.EntryRef()->directory);
		entryMessage.AddString("name", model.EntryRef()->name);
		BContainerWindow* deskWindow
			= dynamic_cast<BContainerWindow*>(Window());
		if (deskWindow)
			deskWindow->PostMessage(&entryMessage, deskWindow->PoseView());
	}

	ShowVolumes(mountVolumesOnDesktop, mountSharedVolumesOntoDesktop);
}


void
DesktopPoseView::AdaptToDesktopIntegrationChange(BMessage* message)
{
	bool mountVolumesOnDesktop = true;
	bool mountSharedVolumesOntoDesktop = true;

	message->FindBool("MountVolumesOntoDesktop", &mountVolumesOnDesktop);
	message->FindBool("MountSharedVolumesOntoDesktop",
		&mountSharedVolumesOntoDesktop);

	ShowVolumes(false, mountSharedVolumesOntoDesktop);
	ShowVolumes(mountVolumesOnDesktop, mountSharedVolumesOntoDesktop);
}