An ancestor class for all models which can show code. Eventually, much of the code that currently resides in StringHolder which only applies to code-holding StringHolders might get moved down here.

	categories
	categoryOfCurrentMethod changeCategory methodCategoryChanged selectedMessageCategoryName

	categories & search pane
	listPaneWithSelector: newSearchPane searchPane textPaneWithSelector:

	commands
	abbreviatedWordingFor: adoptMessageInCurrentChangeset browseImplementors browseSenders copyUpOrCopyDown makeSampleInstance offerMenu offerShiftedClassListMenu offerUnshiftedClassListMenu removeClass shiftedYellowButtonActivity showUnreferencedClassVars showUnreferencedInstVars spawn: spawnFullProtocol spawnHierarchy spawnProtocol spawnToClass: spawnToCollidingClass: unshiftedYellowButtonActivity

	construction
	addLowerPanesTo:at:with: buildClassBrowserEditString: buildMorphicCodePaneWith:

	contents
	commentContents contents contentsChanged contentsSymbol contentsSymbol:

	controls
	addOptionalButtonsTo:at:plus: buttonWithSelector: codePaneProvenanceButton codePaneProvenanceString contentsSymbolQuints decorateButtons decorateForInheritance inheritanceButton optionalButtonPairs optionalButtonRow sourceAndDiffsQuintsOnly

diffs

defaultDiffsSymbol diffButton diffFromPriorSourceFor: prettyDiffButton regularDiffButton restoreTextualCodingPane showDiffs showDiffs: showPrettyDiffs: showRegularDiffs: showingAnyKindOfDiffs showingDiffsString showingPrettyDiffs showingPrettyDiffsString showingRegularDiffs showingRegularDiffsString toggleColorPrint toggleDiff toggleDiffing togglePlainSource togglePrettyDiffing togglePrettyPrint toggleRegularDiffing wantsDiffFeedback

	message category functions
	canShowMultipleMessageCategories

	message list
	decompiledSourceIntoContents selectedBytecodes selectedMessage sourceStringPrettifiedAndDiffed validateMessageSource:forSelector:

	message list menu
	messageListKey:from:

	misc
	getSelectorAndSendQuery:to: getSelectorAndSendQuery:to:with: isThereAnOverride menuButton modelWakeUpIn: okayToAccept priorSourceOrNil refreshAnnotation refusesToAcceptCode releaseCachedState sampleInstanceOfSelectedClass sendQuery:to: setClassAndSelectorIn: suggestCategoryToSpawnedBrowser: useSelector:orGetSelectorAndSendQuery:to:

	self-updating
	didCodeChangeElsewhere stepIn: updateCodePaneIfNeeded updateListsAndCodeIn: wantsStepsIn:

	tiles
	addModelItemsToWindowMenu: installTextualCodingPane installTilesForSelection showTiles: showingTiles showingTilesString tilesToggleButton toggleShowingTiles

what to show

addContentsTogglesTo: colorPrintString offerWhatToShowMenu prettyPrintString setContentsToForceRefetch showAltSyntax: showByteCodes: showComment showDecompile: showDocumentation: showingAltSyntax showingAltSyntaxString showingByteCodes showingByteCodesString showingColorPrint showingDecompile showingDecompileString showingDocumentation showingDocumentationString showingPlainSource showingPlainSourceString showingPrettyPrint showingSource sourceOrInfoButton toggleAltSyntax toggleDecompile toggleShowDocumentation toggleShowingByteCodes

	annotation	top
	addOptionalAnnotationsTo:at:plus: Add an annotation pane to the window if preferences indicate a desire for it, and return the incoming verticalOffset plus the height of the added pane, if any
	addPriorVersionsCountForSelector:ofClass:to: add an annotation detailing the prior versions count
	annotation Provide a line of content for an annotation pane, representing information about the method associated with the selected class and selector in the receiver.
	annotationForSelector:ofClass: Provide a line of content for an annotation pane, representing information about the given selector and class
	annotationPaneMenu:shifted:
	annotationRequests
	annotationSeparator Answer the separator to be used between annotations
	defaultAnnotationPaneHeight Answer the receiver's preferred default height for new annotation panes.
	defaultButtonPaneHeight Answer the user's preferred default height for new button panes.

	categories	top
	categoryOfCurrentMethod Answer the category that owns the current method. If unable to determine a category, answer nil.
	changeCategory Present a menu of the categories of messages for the current class, and let the user choose a new category for the current message
	methodCategoryChanged
	selectedMessageCategoryName Answer the name of the message category of the message of the currently selected context.

	categories & search pane	top
	listPaneWithSelector: If, among my window's paneMorphs, there is a list pane defined with aSelector as its retriever, answer it, else answer nil
	newSearchPane Answer a new search pane for the receiver
	searchPane Answer the search pane associated with the receiver in its window, or nil if none. Morphic only
	textPaneWithSelector: If, among my window's paneMorphs, there is a text pane defined with aSelector as its retriever, answer it, else answer nil

	commands	top
	abbreviatedWordingFor: Answer the abbreviated form of wording, from a static table which you're welcome to edit. Answer nil if there is no entry -- in which case the long firm will be used on the corresponding browser button.
	adoptMessageInCurrentChangeset Add the receiver's method to the current change set if not already there
	browseImplementors Create and schedule a message set browser on all implementors of the currently selected message selector. Do nothing if no message is selected.
	browseSenders Create and schedule a message set browser on all senders of the currently selected message selector. Of there is no message currently selected, offer a type-in
	copyUpOrCopyDown Used to copy down code from a superclass to a subclass or vice-versa in one easy step, if you know what you're doing. Prompt the user for which class to copy down or copy up to, then spawn a fresh browser for that class, with the existing code planted in it, and with the existing method category also established.
	makeSampleInstance
	offerMenu Offer a menu to the user from the bar of tool buttons
	offerShiftedClassListMenu Offer the shifted class-list menu.
	offerUnshiftedClassListMenu Offer the shifted class-list menu.
	removeClass Remove the selected class from the system, at interactive user request. Make certain the user really wants to do this, since it is not reversible. Answer true if removal actually happened.
	shiftedYellowButtonActivity Offer the shifted selector-list menu
	showUnreferencedClassVars Search for all class variables known to the selected class, and put up a list of those that have no references anywhere in the system. The search includes superclasses, so that you don't need to navigate your way to the class that defines each class variable in order to determine whether it is unreferenced
	showUnreferencedInstVars Search for all instance variables known to the selected class, and put up a list of those that have no references anywhere in the system. The search includes superclasses, so that you don't need to navigate your way to the class that defines each inst variable in order to determine whether it is unreferenced
	spawn: Create and schedule a spawned message category browser for the currently selected message category. The initial text view contains the characters in aString. In the spawned browser, preselect the current selector (if any) as the going-in assumption, though upon acceptance this will often change
	spawnFullProtocol Create and schedule a new protocol browser on the currently selected class or meta.
	spawnHierarchy Create and schedule a new class hierarchy browser on the currently selected class or meta.
	spawnProtocol Create and schedule a new protocol browser on the currently selected class or meta.
	spawnToClass: Used to copy down code from a superclass to a subclass in one easy step, if you know what you're doing. Spawns a new message-category browser for the indicated class, populating it with the source code seen in the current tool.
	spawnToCollidingClass: Potentially used to copy down code from a superclass to a subclass in one easy step, in the case where the given class already has its own version of code, which would consequently be clobbered if the spawned code were accepted.
	unshiftedYellowButtonActivity Offer the unshifted shifted selector-list menu

	construction	top
	addLowerPanesTo:at:with:
	buildClassBrowserEditString: Create and schedule a new class browser for the current selection, with initial textual contents set to aString. This is used specifically in spawning where a class is established but a method-category is not.
	buildMorphicCodePaneWith:

	contents	top
	commentContents documentation for the selected method
	contents Answer the source code or documentation for the selected method
	contentsChanged
	contentsSymbol Answer a symbol indicating what kind of content should be shown for the method; for normal showing of source code, this symbol is #source. A nil value in the contentsSymbol slot will be set to #source by this method
	contentsSymbol: Set the contentsSymbol as indicated. #source means to show source code, #comment means to show the first comment found in the source code

	controls	top
	addOptionalButtonsTo:at:plus: If the receiver wishes it, add a button pane to the window, and answer the verticalOffset plus the height added
	buttonWithSelector: If receiver has a control button with the given action selector answer it, else answer nil. morphic only at this point
	codePaneProvenanceButton Answer a button that reports on, and allow the user to modify, the code-pane-provenance setting
	codePaneProvenanceString Answer a string that reports on code-pane-provenance
	contentsSymbolQuints Answer a list of quintuplets representing information on the alternative views available in the code pane first element: the contentsSymbol used second element: the selector to call when this item is chosen. third element: the selector to call to obtain the wording of the menu item. fourth element: the wording to represent this view fifth element: balloon help A hypen indicates a need for a seperator line in a menu of such choices
	decorateButtons Change screen feedback for any buttons in the UI of the receiver that may wish it. Initially, it is only the Inheritance button that is decorated, but one can imagine others.
	decorateForInheritance Check to see if the currently-viewed method has a super send or an override, and if so, change screen feedback, unless the #decorateBrowserButtons says not to.
	inheritanceButton If receiver has an Inheritance button, answer it, else answer nil. morphic only at this point
	optionalButtonPairs Answer a tuple (formerly pairs) defining buttons, in the format: button label selector to send help message
	optionalButtonRow Answer a row of control buttons
	sourceAndDiffsQuintsOnly Answer a list of quintuplets representing information on the alternative views available in the code pane for the case where the only plausible choices are showing source or either of the two kinds of diffs

	diffs	top
	defaultDiffsSymbol Answer the code symbol to use when generically switching to diffing
	diffButton Return a checkbox that lets the user decide whether diffs should be shown or not. Not sent any more but retained against the possibility of existing subclasses outside the base image using it.
	diffFromPriorSourceFor: If there is a prior version of source for the selected method, return a diff, else just return the source code
	prettyDiffButton Return a checkbox that lets the user decide whether prettyDiffs should be shown or not
	regularDiffButton Return a checkbox that lets the user decide whether regular diffs should be shown or not
	restoreTextualCodingPane If the receiver is showing tiles, restore the textual coding pane
	showDiffs Answer whether the receiver is showing diffs of source code. The preferred protocol here is #showingRegularDiffs, but this message is still sent by some preexisting buttons so is retained.
	showDiffs: Set whether I'm showing diffs as indicated; use the global preference to determine which kind of diffs to institute.
	showPrettyDiffs: Set whether I'm showing pretty diffs as indicated
	showRegularDiffs: Set whether I'm showing regular diffs as indicated
	showingAnyKindOfDiffs Answer whether the receiver is currently set to show any kind of diffs
	showingDiffsString Answer a string representing whether I'm showing diffs. Not sent any more but retained so that prexisting buttons that sent this will not raise errors.
	showingPrettyDiffs Answer whether the receiver is showing pretty diffs of source code
	showingPrettyDiffsString Answer a string representing whether I'm showing pretty diffs
	showingRegularDiffs Answer whether the receiver is showing regular diffs of source code
	showingRegularDiffsString Answer a string representing whether I'm showing regular diffs
	toggleColorPrint Toggle whether color-print is in effect in the code pane
	toggleDiff Retained for backward compatibility with existing buttons in existing images
	toggleDiffing Toggle whether diffs should be shown in the code pane. If any kind of diffs were being shown, stop showing diffs. If no kind of diffs were being shown, start showing whatever kind of diffs are called for by default.
	togglePlainSource Toggle whether plain source shown in the code pane
	togglePrettyDiffing Toggle whether pretty-diffing should be shown in the code pane
	togglePrettyPrint Toggle whether pretty-print is in effectin the code pane
	toggleRegularDiffing Toggle whether regular-diffing should be shown in the code pane
	wantsDiffFeedback Answer whether the receiver is showing diffs of source code

	message category functions	top
	canShowMultipleMessageCategories Answer whether the receiver is capable of showing multiple message categories

	message list	top
	decompiledSourceIntoContents Obtain a source string by decompiling the method's code, and place that source string into my contents. Get temps from source file
	selectedBytecodes
	selectedMessage Answer a copy of the source code for the selected message. This generic version is probably actually never reached, since every subclass probably reimplements and does not send to super. In time, ideally, most, or all, reimplementors would vanish and all would defer instead to a universal version right here. Everything in good time.
	sourceStringPrettifiedAndDiffed Answer a copy of the source code for the selected message, transformed by diffing and pretty-printing exigencies
	validateMessageSource:forSelector: Check whether there is evidence that method source is invalid

	message list menu	top
	messageListKey:from: Respond to a Command key. I am a model with a code pane, and I also have a listView that has a list of methods. The view knows how to get the list and selection.

	misc	top
	getSelectorAndSendQuery:to: Obtain a selector relevant to the current context, and then send the querySelector to the queryPerformer with the selector obtained as its argument. If no message is currently selected, then obtain a method name from a user type-in
	getSelectorAndSendQuery:to:with: Obtain a selector relevant to the current context, and then send the querySelector to the queryPerformer with the selector obtained and queryArgs as its arguments. If no message is currently selected, then obtain a method name from a user type-in
	isThereAnOverride Answer whether any subclass of my selected class implements my selected selector
	menuButton Answer a button that brings up a menu. Useful when adding new features, but at present is between uses
	modelWakeUpIn: The window has been activated. Respond to possible changes that may have taken place while it was inactive
	okayToAccept Answer whether it is okay to accept the receiver's input
	priorSourceOrNil If the currently-selected method has a previous version, return its source, else return nil
	refreshAnnotation If the receiver has an annotation pane that does not bear unaccepted edits, refresh it
	refusesToAcceptCode Answer whether receiver, given its current contentsSymbol, could accept code happily if asked to
	releaseCachedState Can always be found again. Don't write on a file.
	sampleInstanceOfSelectedClass Return a sample instance of the class currently being pointed at
	sendQuery:to: Apply a query to the primary selector associated with the current context. If no such selection exists, obtain one by user type-in. Then send querySelector to queryPerformer with the selector as its argument.
	setClassAndSelectorIn: Evaluate csBlock with my selected class and and selector as its arguments; provide nil arguments if I don't have a method currently selected
	suggestCategoryToSpawnedBrowser: aBrowser is a message-category browser being spawned from the receiver. Tell it what it needs to know to get its category info properly set up.
	useSelector:orGetSelectorAndSendQuery:to: If incomingSelector is not nil, use it, else obtain a selector from user type-in. Using the determined selector, send the query to the performer provided.

	self-updating	top
	didCodeChangeElsewhere Determine whether the code for the currently selected method and class has been changed somewhere else.
	stepIn:
	updateCodePaneIfNeeded If the code for the currently selected method has changed underneath me, then update the contents of my code pane unless it holds unaccepted edits
	updateListsAndCodeIn:
	wantsStepsIn:

	tiles	top
	addModelItemsToWindowMenu: Add model-related item to the window menu
	installTextualCodingPane Install text into the code pane
	installTilesForSelection Install universal tiles into the code pane.
	showTiles: Set the showingTiles as indicated. The fact that there are initially no senders of this reflects that fact that initially this trait is only directly settable through the UI; later there may be senders, such as if one wanted to set a system up so that all newly-opened browsers showed tiles rather than text.
	showingTiles Answer whether the receiver is currently showing tiles
	showingTilesString Answer a string characterizing whether tiles are currently showing or not
	tilesToggleButton Return a checkbox that lets the user decide whether tiles or textual source should show in the code pane
	toggleShowingTiles Toggle whether tiles should be shown in the code pane

	what to show	top
	addContentsTogglesTo: Add updating menu toggles governing contents to aMenu.
	colorPrintString Answer whether the receiver is showing colorPrint
	offerWhatToShowMenu Offer a menu governing what to show
	prettyPrintString Answer whether the receiver is showing pretty-print
	setContentsToForceRefetch Set the receiver's contents such that on the next update the contents will be formulated afresh. This is a critical and obscure difference between Browsers on the one hand and MessageSets on the other, and has over the years been the source of much confusion and much difficulty. By centralizing the different handling here, we don't need so many idiosyncratic overrides in MessageSet any more
	showAltSyntax: Set the decompile toggle as indicated
	showByteCodes: Get into or out of bytecode-showoing mode
	showComment Answer whether the receiver should show documentation rather than, say, source code
	showDecompile: Set the decompile toggle as indicated
	showDocumentation: Set the showDocumentation toggle as indicated
	showingAltSyntax Answer whether the receiver should show alt syntax rather than, say, source code
	showingAltSyntaxString Answer a string characerizing whether altSyntax is showing
	showingByteCodes Answer whether the receiver is showing bytecodes
	showingByteCodesString Answer whether the receiver is showing bytecodes
	showingColorPrint Answer whether the receiver is showing color-pretty-print
	showingDecompile Answer whether the receiver should show decompile rather than, say, source code
	showingDecompileString Answer a string characerizing whether decompilation is showing
	showingDocumentation Answer whether the receiver should show documentation rather than, say, source code
	showingDocumentationString Answer a string characerizing whether documentation is showing
	showingPlainSource Answer whether the receiver is showing plain source
	showingPlainSourceString Answer a string telling whether the receiver is showing plain source
	showingPrettyPrint Answer whether the receiver is showing pretty-print
	showingSource Answer whether the receiver is currently showing source code
	sourceOrInfoButton Return a checkbox that lets the user decide whether the full source or just documentation should show in the code pane
	toggleAltSyntax Toggle the setting of the showingAltSyntax flag, unless there are unsubmitted edits that the user declines to discard
	toggleDecompile Toggle the setting of the showingDecompile flag, unless there are unsubmitted edits that the user declines to discard
	toggleShowDocumentation Toggle the setting of the showingDocumentation flag, unless there are unsubmitted edits that the user declines to discard
	toggleShowingByteCodes Toggle whether the receiver is showing bytecodes