org.eclipse.compare.package.html Maven / Gradle / Ivy
Package-level Javadoc
Provides support for performing structural and textual
compare operations on arbitrary data and displaying the results.
Package Specification
The class CompareUI defines the entry point to initiate a configurable
compare operation on arbitrary resources. The result of the compare is
opened into a compare editor where the details can be browsed and edited
in dynamically selected structure and content viewers.
A compare operation must be implemented as a subclass of CompareEditorInput.
A CompareEditorInput runs a (potentially lengthy) compare operation
under progress monitor control, creates a UI for drilling-down into the
compare results, tracks the dirty state of the result in case of merge,
and saves any changes that occured during a merge.
The NavigationAction is used to navigate (step) through the individual
differences of a CompareEditorInput.
An instance of CompareConfiguration configures various UI aspects
of compare/merge viewers like title labels and images, or whether a side
of a merge viewer is editable. It is passed to the CompareEditorInput
on creation.
When implementing a hierarchical compare operation as a subclass of
CompareEditorInput clients have to provide a tree of objects where each
node implements the interface
org.eclipse.compare.structuremergeviewer.IStructureComparator.
This interface is used by the hierarchical differencing engine
(org.eclipse.compare.structuremergeviewer.Differencer) to walk the tree.
In addition every leaf of the tree must implement the IStreamContentAccessor
or IEncodedStreamContentAccessor
interfaces in order to give the differencing engine access to its stream content
and to its encoding (with IEncodedStreamContentAccessor).
The abstract class BufferedContent provides a default implementation
for the IStreamContentAccessor and IContentChangeNotifier interfaces.
Its subclass ResourceNode adds an implementation for the
IStructureComparator and ITypedElement interfaces
based on Eclipse workbench resources (org.eclipse.core.resources.IResource).
It can be used without modification as the input to the differencing engine.
The ZipFileStructureCreator is an implementation of the
org.eclipse.compare.structuremergeviewer.IStructureCreator interface
and makes the contents of a zip archive available as a
hierarchical structure of IStructureComparators which can be easily compared
by the differencing engine (org.eclipse.compare.structuremergeviewer.Differencer).
It is a good example for how to make structured files available to the hierarchical
compare functionality of the Compare plugin.
The EditionSelectionDialog is a simple selection dialog where
one input element can be compared against a list of historic variants (editions)
of the same input element. The dialog can be used to implement functions
like "Replace with Version" or "Replace with Edition" on workbench resources.
In addition it is possible to specify a subsection of the input element
(e.g. a method in a Java source file) by means of a path. In this
case the dialog compares only the subsection (as specified by the path)
with the corresponding subsection in the list of editions. This functionality
can be used to implement "Replace with Method Edition" for the Java
language.
The EditionSelectionDialog requires that the editions implement
the IStreamContentAccessor and IModificationDate interfaces.
The HistoryItem is a convenience class that implements these interfaces
for IFileState objects.
The CompareViewerPane is a convenience class which provides
a label and local toolbar for a compare viewer (or any other subclass of a
JFace Viewer).
Its abstract subclass CompareViewerSwitchingPane supports dynamic
viewer switching, that is the viewer installed in the pane is dynamically
determined by the pane's input object.
Both classes are useful if you want to use compare viewers outside the context of
a compare editor, for example in a dialog or wizard.
A Splitter is an extension of a SashForm that supports nesting, maximizing of panes,
and propagating the visibility state of panes.
The interface IStreamMerger defines a single operation for performing a three-way merge on three
input streams. The merged result is written to an output stream.
Clients must implement this interface when contributing new mergers to the
org.eclipse.compare.streamMergers
extension point.
New IStreamMergers can be created for registered types with the createStreamMerger methods of CompareUI.