Part of a refactoring/rewrite I was once working on,
work in progress, don't remember how far I got. Supposed to extract the image file and document page navigation from ShowImageView. Not included in build. Untested. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39101 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
parent
43eea4c2c4
commit
707466cad1
443
src/apps/showimage/ImageFileNavigator.cpp
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443
src/apps/showimage/ImageFileNavigator.cpp
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@ -0,0 +1,443 @@
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/*
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* Copyright 2003-2010, Haiku, Inc. All Rights Reserved.
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* Copyright 2004-2005 yellowTAB GmbH. All Rights Reserverd.
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* Copyright 2006 Bernd Korz. All Rights Reserved
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Fernando Francisco de Oliveira
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* Michael Wilber
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* Michael Pfeiffer
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* Ryan Leavengood
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* yellowTAB GmbH
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* Bernd Korz
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* Stephan Aßmus <superstippi@gmx.de>
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*/
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#include "ImageFileNavigator.h"
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#include <math.h>
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#include <new>
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#include <stdio.h>
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#include <Alert.h>
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#include <Application.h>
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#include <Bitmap.h>
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#include <BitmapStream.h>
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#include <Catalog.h>
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#include <Clipboard.h>
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#include <Debug.h>
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#include <Directory.h>
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#include <Entry.h>
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#include <File.h>
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#include <Locale.h>
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#include <MenuBar.h>
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#include <MenuItem.h>
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#include <Message.h>
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#include <NodeInfo.h>
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#include <Path.h>
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#include <PopUpMenu.h>
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#include <Rect.h>
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#include <Region.h>
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#include <Roster.h>
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#include <Screen.h>
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#include <ScrollBar.h>
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#include <StopWatch.h>
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#include <SupportDefs.h>
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#include <TranslatorRoster.h>
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#include <tracker_private.h>
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#include "ProgressWindow.h"
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#include "ShowImageApp.h"
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#include "ShowImageConstants.h"
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#include "ShowImageWindow.h"
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// TODO: Remove this and use Tracker's Command.h once it is moved into the
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// private headers!
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namespace BPrivate {
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const uint32 kMoveToTrash = 'Ttrs';
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}
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using std::nothrow;
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#define SHOW_IMAGE_ORIENTATION_ATTRIBUTE "ShowImage:orientation"
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enum ImageFileNavigator::image_orientation
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ImageFileNavigator::fTransformation[ImageProcessor::kNumberOfAffineTransformations][kNumberOfOrientations] = {
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// rotate 90°
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{k90, k180, k270, k0, k270V, k0V, k90V, k0H},
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// rotate -90°
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{k270, k0, k90, k180, k90V, k0H, k270V, k0V},
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// mirror vertical
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{k0H, k270V, k0V, k90V, k180, k270, k0, k90},
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// mirror horizontal
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{k0V, k90V, k0H, k270V, k0, k90, k180, k270}
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};
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static bool
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entry_ref_is_file(const entry_ref *ref)
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{
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BEntry entry(ref, true);
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if (entry.InitCheck() != B_OK)
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return false;
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return entry.IsFile();
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}
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ImageFileNavigator::ImageFileNavigator(BRect rect, const char *name, uint32 resizingMode,
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uint32 flags)
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:
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fDocumentIndex(1),
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fDocumentCount(1),
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{
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}
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ImageFileNavigator::~ImageFileNavigator()
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{
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}
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void
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ImageFileNavigator::SetTrackerMessenger(const BMessenger& trackerMessenger)
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{
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fTrackerMessenger = trackerMessenger;
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}
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status_t
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ImageFileNavigator::LoadImage(const entry_ref* ref, BBitmap** bitmap)
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{
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if (bitmap == NULL)
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return B_BAD_VALUE;
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// If no ref was specified, load the specified page of the current file.
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if (ref == NULL)
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ref = &fCurrentRef;
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BTranslatorRoster *roster = BTranslatorRoster::Default();
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if (roster == NULL)
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return B_ERROR;
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if (!entry_ref_is_file(ref))
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return B_ERROR;
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BFile file(ref, B_READ_ONLY);
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translator_info info;
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memset(&info, 0, sizeof(translator_info));
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BMessage ioExtension;
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if (ref != &fCurrentRef) {
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// if new image, reset to first document
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fDocumentIndex = 1;
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}
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if (ioExtension.AddInt32("/documentIndex", fDocumentIndex) != B_OK)
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return B_ERROR;
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BMessage progress(kMsgProgressStatusUpdate);
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if (ioExtension.AddMessenger("/progressMonitor", fProgressWindow) == B_OK
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&& ioExtension.AddMessage("/progressMessage", &progress) == B_OK)
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fProgressWindow->Start();
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// Translate image data and create a new ShowImage window
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BBitmapStream outstream;
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status_t status = roster->Identify(&file, &ioExtension, &info, 0, NULL,
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B_TRANSLATOR_BITMAP);
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if (status == B_OK) {
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status = roster->Translate(&file, &info, &ioExtension, &outstream,
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B_TRANSLATOR_BITMAP);
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}
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fProgressWindow->Stop();
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if (status != B_OK)
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return status;
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if (outstream.DetachBitmap(bitmap) != B_OK)
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return B_ERROR;
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fCurrentRef = *ref;
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// restore orientation
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int32 orientation;
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fImageOrientation = k0;
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fInverted = false;
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if (file.ReadAttr(SHOW_IMAGE_ORIENTATION_ATTRIBUTE, B_INT32_TYPE, 0,
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&orientation, sizeof(orientation)) == sizeof(orientation)) {
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fInverted = (orientation & 256) != 0;
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fImageOrientation = (orientation & 255) != 0;
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}
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// get the number of documents (pages) if it has been supplied
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int32 documentCount = 0;
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if (ioExtension.FindInt32("/documentCount", &documentCount) == B_OK
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&& documentCount > 0)
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fDocumentCount = documentCount;
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else
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fDocumentCount = 1;
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fImageType = info.name;
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fImageMime = info.MIME;
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be_roster->AddToRecentDocuments(&fCurrentRef, kApplicationSignature);
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return B_OK;
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}
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void
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ImageFileNavigator::GetName(BString* outName)
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{
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BEntry entry(&fCurrentRef);
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char name[B_FILE_NAME_LENGTH];
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if (entry.InitCheck() < B_OK || entry.GetName(name) < B_OK)
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outName->SetTo("");
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else
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outName->SetTo(name);
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}
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void
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ImageFileNavigator::GetPath(BString* outPath)
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{
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BEntry entry(&fCurrentRef);
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BPath path;
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if (entry.InitCheck() < B_OK || entry.GetPath(&path) < B_OK)
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outPath->SetTo("");
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else
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outPath->SetTo(path.Path());
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}
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int32
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ImageFileNavigator::CurrentPage()
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{
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return fDocumentIndex;
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}
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int32
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ImageFileNavigator::PageCount()
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{
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return fDocumentCount;
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}
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status_t
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ImageFileNavigator::FirstPage(BBitmap** bitmap)
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{
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if (fDocumentIndex != 1) {
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fDocumentIndex = 1;
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return LoadImage(NULL, bitmap);
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}
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return B_BAD_INDEX;
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}
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status_t
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ImageFileNavigator::LastPage(BBitmap** bitmap)
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{
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if (fDocumentIndex != fDocumentCount) {
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fDocumentIndex = fDocumentCount;
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return LoadImage(NULL, bitmap);
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}
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return B_BAD_INDEX;
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}
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status_t
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ImageFileNavigator::NextPage(BBitmap** bitmap)
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{
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if (fDocumentIndex < fDocumentCount) {
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fDocumentIndex++;
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return LoadImage(NULL, bitmap);
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}
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return B_BAD_INDEX;
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}
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status_t
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ImageFileNavigator::PrevPage(BBitmap** bitmap)
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{
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if (fDocumentIndex > 1) {
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fDocumentIndex--;
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return LoadImage(NULL, bitmap);
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}
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return B_BAD_INDEX;
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}
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status_t
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ImageFileNavigator::GoToPage(int32 page, BBitmap** bitmap)
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{
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if (page > 0 && page <= fDocumentCount && page != fDocumentIndex) {
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fDocumentIndex = page;
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return LoadImage(NULL, bitmap);
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}
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return B_BAD_INDEX;
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}
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status_t
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ImageFileNavigator::FirstFile(BBitmap** bitmap)
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{
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return _LoadNextImage(true, true, bitmap);
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}
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status_t
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ImageFileNavigator::NextFile(BBitmap** bitmap)
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{
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return _LoadNextImage(true, false, bitmap);
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}
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status_t
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ImageFileNavigator::PrevFile(BBitmap** bitmap)
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{
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return _LoadNextImage(false, false, bitmap);
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}
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bool
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ImageFileNavigator::HasNextFile()
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{
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entry_ref ref;
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return _FindNextImage(&fCurrentRef, &ref, true, false);
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}
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bool
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ImageFileNavigator::HasPrevFile()
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{
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entry_ref ref;
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return _FindNextImage(&fCurrentRef, &ref, false, false);
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}
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// #pragma mark -
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bool
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ImageFileNavigator::_IsImage(const entry_ref *ref)
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{
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if (ref == NULL || !entry_ref_is_file(ref))
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return false;
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BFile file(ref, B_READ_ONLY);
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if (file.InitCheck() != B_OK)
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return false;
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BTranslatorRoster *roster = BTranslatorRoster::Default();
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if (!roster)
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return false;
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BMessage ioExtension;
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if (ioExtension.AddInt32("/documentIndex", fDocumentIndex) != B_OK)
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return false;
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translator_info info;
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memset(&info, 0, sizeof(translator_info));
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if (roster->Identify(&file, &ioExtension, &info, 0, NULL,
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B_TRANSLATOR_BITMAP) != B_OK)
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return false;
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return true;
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}
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bool
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ImageFileNavigator::_FindNextImage(entry_ref* currentRef, entry_ref* ref,
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bool next, bool rewind)
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{
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// Based on GetTrackerWindowFile function from BeMail
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if (!fTrackerMessenger.IsValid())
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return false;
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//
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// Ask the Tracker what the next/prev file in the window is.
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// Continue asking for the next reference until a valid
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// image is found.
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//
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entry_ref nextRef = *currentRef;
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bool foundRef = false;
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while (!foundRef) {
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BMessage request(B_GET_PROPERTY);
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BMessage spc;
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if (rewind)
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spc.what = B_DIRECT_SPECIFIER;
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else if (next)
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spc.what = 'snxt';
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else
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spc.what = 'sprv';
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spc.AddString("property", "Entry");
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if (rewind)
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// if rewinding, ask for the ref to the
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// first item in the directory
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spc.AddInt32("data", 0);
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else
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spc.AddRef("data", &nextRef);
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request.AddSpecifier(&spc);
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BMessage reply;
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if (fTrackerMessenger.SendMessage(&request, &reply) != B_OK)
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return false;
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if (reply.FindRef("result", &nextRef) != B_OK)
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return false;
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if (_IsImage(&nextRef))
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foundRef = true;
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rewind = false;
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// stop asking for the first ref in the directory
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}
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*ref = nextRef;
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return foundRef;
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}
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status_t
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ImageFileNavigator::_LoadNextImage(bool next, bool rewind, BBitmap** bitmap)
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{
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if (bitmap == NULL)
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return B_BAD_VALUE;
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entry_ref curRef = fCurrentRef;
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entry_ref imgRef;
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bool found = _FindNextImage(&curRef, &imgRef, next, rewind);
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if (found) {
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// Keep trying to load images until:
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// 1. The image loads successfully
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// 2. The last file in the directory is found (for find next or find first)
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// 3. The first file in the directory is found (for find prev)
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// 4. The call to _FindNextImage fails for any other reason
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while (LoadImage(&imgRef, bitmap) != B_OK) {
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curRef = imgRef;
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found = _FindNextImage(&curRef, &imgRef, next, false);
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if (!found)
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return B_ENTRY_NOT_FOUND;
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}
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_SetTrackerSelectionToCurrent();
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return B_OK;
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}
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return B_ENTRY_NOT_FOUND;
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}
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void
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ImageFileNavigator::_SetTrackerSelectionToCurrent()
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{
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BMessage setsel(B_SET_PROPERTY);
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setsel.AddSpecifier("Selection");
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setsel.AddRef("data", &fCurrentRef);
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fTrackerMessenger.SendMessage(&setsel);
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}
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109
src/apps/showimage/ImageFileNavigator.h
Normal file
109
src/apps/showimage/ImageFileNavigator.h
Normal file
@ -0,0 +1,109 @@
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/*
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* Copyright 2003-2010, Haiku, Inc. All Rights Reserved.
|
||||
* Copyright 2004-2005 yellowTAB GmbH. All Rights Reserverd.
|
||||
* Copyright 2006 Bernd Korz. All Rights Reserved
|
||||
* Distributed under the terms of the MIT License.
|
||||
*
|
||||
* Authors:
|
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* Fernando Francisco de Oliveira
|
||||
* Michael Wilber
|
||||
* Michael Pfeiffer
|
||||
* yellowTAB GmbH
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||||
* Bernd Korz
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||||
* Stephan Aßmus <superstippi@gmx.de>
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*/
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#ifndef IMAGE_FILE_NAVIGATOR_H
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#define IMAGE_FILE_NAVIGATOR_H
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#include <Bitmap.h>
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#include <Entry.h>
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#include <NodeInfo.h>
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#include <String.h>
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#include <TranslatorRoster.h>
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class ProgressWindow;
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class ImageFileNavigator {
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public:
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ImageFileNavigator(
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ProgressWindow* progressWindow);
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virtual ~ImageFileNavigator();
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void SetTrackerMessenger(
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const BMessenger& trackerMessenger);
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status_t LoadImage(const entry_ref* ref, BBitmap** bitmap);
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const entry_ref* ImageRef() const { return &fCurrentRef; }
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void GetName(BString* name);
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void GetPath(BString* name);
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// The same image file may have multiple pages, TIFF images for
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// example. The page count is determined at image loading time.
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int32 CurrentPage();
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int32 PageCount();
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status_t FirstPage(BBitmap** bitmap);
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status_t LastPage(BBitmap** bitmap);
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status_t NextPage(BBitmap** bitmap);
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status_t PrevPage(BBitmap** bitmap);
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status_t GoToPage(int32 page, BBitmap** bitmap);
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// Navigation to the next/previous image file is based on
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// communication with Tracker, the folder containing the current
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// image needs to be open for this to work. The routine first tries
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// to find the next candidate file, then tries to load it as image.
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// As long as loading fails, the operation is repeated for the next
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// candidate file.
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status_t FirstFile(BBitmap** bitmap);
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status_t NextFile(BBitmap** bitmap);
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status_t PrevFile(BBitmap** bitmap);
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bool HasNextFile();
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bool HasPrevFile();
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||||
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private:
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enum image_orientation {
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||||
k0, // 0
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||||
k90, // 1
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||||
k180, // 2
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||||
k270, // 3
|
||||
k0V, // 4
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||||
k90V, // 5
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||||
k0H, // 6
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||||
k270V, // 7
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||||
kNumberOfOrientations,
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||||
};
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||||
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bool _IsImage(const entry_ref* pref);
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||||
bool _FindNextImage(entry_ref* inCurrent,
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||||
entry_ref* outImage, bool next,
|
||||
bool rewind);
|
||||
status_t _LoadNextImage(bool next, bool rewind);
|
||||
void _SetTrackerSelectionToCurrent();
|
||||
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||||
private:
|
||||
BMessenger fTrackerMessenger;
|
||||
// of the window that this was launched from
|
||||
entry_ref fCurrentRef;
|
||||
|
||||
int32 fDocumentIndex;
|
||||
// of the image in the file
|
||||
int32 fDocumentCount;
|
||||
// number of images in the file
|
||||
|
||||
BString fImageType;
|
||||
// Type of image, for use in status bar and caption
|
||||
BString fImageMime;
|
||||
|
||||
ProgressWindow* fProgressWindow;
|
||||
|
||||
image_orientation fImageOrientation;
|
||||
static image_orientation fTransformation[
|
||||
ImageProcessor
|
||||
::kNumberOfAffineTransformations]
|
||||
[kNumberOfOrientations];
|
||||
};
|
||||
|
||||
#endif // IMAGE_FILE_NAVIGATOR_H
|
||||
Loading…
Reference in New Issue
Block a user