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HaikuDepot: Added UndoableEditListener list to TextDocument

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This is all work in progress. The plan is to move the code that does any
actual changes to the TextDocument into UndoableEdit implementations, then
emit these edits to interesed listeners. They can then store them to
implement the edit history. If there are not listeners, the edits will
simply be released after they've done their work.
Implemented so far is only the support for storing the edit listeners.
This commit is contained in:
Stephan Aßmus 2015-02-22 21:25:49 +01:00
parent b5cbbf8041
commit 4bf45bfb5d
2 changed files with 40 additions and 2 deletions
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29
src/apps/haikudepot/textview/TextDocument.cpp
View File

@ -516,6 +516,20 @@ TextDocument::RemoveListener(const TextListenerRef& listener)
}
bool
TextDocument::AddUndoListener(const UndoableEditListenerRef& listener)
{
return fUndoListeners.Add(listener);
}
bool
TextDocument::RemoveUndoListener(const UndoableEditListenerRef& listener)
{
return fUndoListeners.Remove(listener);
}
void
TextDocument::_NotifyTextChanging(TextChangingEvent& event) const
{
@ -549,3 +563,18 @@ TextDocument::_NotifyTextChanged(const TextChangedEvent& event) const
}
}
void
TextDocument::_NotifyUndoableEditHappened(const UndoableEditRef& edit) const
{
// Copy listener list to have a stable list in case listeners
// are added/removed from within the notification hook.
UndoListenerList listeners(fUndoListeners);
int32 count = listeners.CountItems();
for (int32 i = 0; i < count; i++) {
const UndoableEditListenerRef& listener = listeners.ItemAtFast(i);
if (listener.Get() == NULL)
continue;
listener->UndoableEditHappened(this, edit);
}
}

13
src/apps/haikudepot/textview/TextDocument.h
View File

@ -11,10 +11,12 @@
#include "List.h"
#include "Paragraph.h"
#include "TextListener.h"
#include "UndoableEditListener.h"
typedef List<Paragraph, false> ParagraphList;
typedef List<TextListenerRef, false> TextListenerList;
typedef List<Paragraph, false> ParagraphList;
typedef List<TextListenerRef, false> TextListenerList;
typedef List<UndoableEditListenerRef, false> UndoListenerList;
class TextDocument;
typedef BReference<TextDocument> TextDocumentRef;
@ -83,12 +85,18 @@ public:
// Listener support
bool AddListener(const TextListenerRef& listener);
bool RemoveListener(const TextListenerRef& listener);
bool AddUndoListener(
const UndoableEditListenerRef& listener);
bool RemoveUndoListener(
const UndoableEditListenerRef& listener);
private:
void _NotifyTextChanging(
TextChangingEvent& event) const;
void _NotifyTextChanged(
const TextChangedEvent& event) const;
void _NotifyUndoableEditHappened(
const UndoableEditRef& edit) const;
private:
ParagraphList fParagraphs;
@ -96,6 +104,7 @@ private:
CharacterStyle fDefaultCharacterStyle;
TextListenerList fTextListeners;
UndoListenerList fUndoListeners;
};