Add IDE interface for observing the mini explorer

allowing the symstring expander to update more smartly

src/ce_interfaces.pas

@@ -186,6 +186,18 @@ type
    *)
   TCEEditableShortCutSubject = specialize TCECustomSubject<ICEEditableShortCut>;
 
+  (**
+   * Listen to mini explorer changes. Mostly made to prevent redundant updates
+   * of the symbolic string translater.
+   *)
+  ICEMiniExplorerObserver = interface(IObserverType)
+  ['ICEMiniExplorerObserver']
+    procedure mnexDirectoryChanged(const directory: string);
+  end;
+  (**
+   * Mini-explorer implements this.
+   *)
+  TCEMiniExplorerSubject = specialize TCECustomSubject<ICEMiniExplorerObserver>;
 
 
   // the option editor uses this value as a hint to display an option container.
@@ -454,6 +466,11 @@ type
   procedure subjProjCompiling(aSubject: TCEProjectSubject; project: ICECommonProject);{$IFDEF RELEASE}inline;{$ENDIF}
   procedure subjProjCompiled(aSubject: TCEProjectSubject; project: ICECommonProject; success: boolean);{$IFDEF RELEASE}inline;{$ENDIF}
 
+  (**
+   * TCEMiniExplorerSubject primitives.
+   *)
+  procedure subjMnexDirectoryChanged(aSubject: TCEMiniExplorerSubject; const directory: string); {$IFDEF RELEASE}inline;{$ENDIF}
+
 
 {
   Service getters:
@@ -507,6 +524,16 @@ begin
 end;
 {$ENDREGION}
 
+{$REGION TCEMiniExplorerSubject ------------------------------------------------}
+procedure subjMnexDirectoryChanged(aSubject: TCEMiniExplorerSubject; const directory: string);
+var
+  i: Integer;
+begin
+  with aSubject do for i:= 0 to fObservers.Count-1 do
+    (fObservers[i] as ICEMiniExplorerObserver).mnexDirectoryChanged(directory);
+end;
+{$ENDREGION}
+
 {$REGION TCEProjectSubject -----------------------------------------------------}
 procedure subjProjNew(aSubject: TCEProjectSubject; project: ICECommonProject);
 var
@@ -555,7 +582,6 @@ begin
   with aSubject do for i:= 0 to fObservers.Count-1 do
     (fObservers[i] as ICEProjectObserver).projCompiled(project, success);
 end;
-
 {$ENDREGION}
 
 {$REGION ICESingleService getters ----------------------------------------------}

src/ce_miniexplorer.pas

@@ -102,6 +102,7 @@ type
     procedure treeFoldersGetImageIndex(Sender: TObject; Node: TTreeNode);
     procedure treeFoldersGetSelectedIndex(Sender: TObject; Node: TTreeNode);
   private
+    fMnxSubj: TCEMiniExplorerSubject;
     fProj: ICECommonProject;
     fFreeProj: ICECommonProject;
     fFavorites: TStringList;
@@ -363,12 +364,14 @@ begin
     free;
   end;
 
+  fMnxSubj:= TCEMiniExplorerSubject.Create;
   EntitiesConnector.addObserver(self);
   EntitiesConnector.addSingleService(self);
 end;
 
 destructor TCEMiniExplorerWidget.destroy;
 begin
+  fMnxSubj.free;
   EntitiesConnector.removeObserver(self);
   with TCEMiniExplorerOptions.create(nil) do
   try
@@ -781,6 +784,7 @@ begin
   if treeFolders.Selected.isNil then
      exit;
   fLastFold := treeFolders.Path.extractFileDir; // trailing path sep
+  subjMnexDirectoryChanged(fMnxSubj, fLastFold);
 end;
 
 procedure TCEMiniExplorerWidget.treeFoldersDblClick(Sender: TObject);

src/ce_symstring.pas

@@ -26,7 +26,7 @@ type
    * TCESymbolExpander is designed to expand Coedit symbolic strings,
    * using the information collected from several observer interfaces.
    *)
-  TCESymbolExpander = class(ICEDocumentObserver, ICEProjectObserver, ICESymStringExpander)
+  TCESymbolExpander = class(ICEDocumentObserver, ICEProjectObserver, ICESymStringExpander, ICEMiniExplorerObserver)
   private
     fProj: TCENativeProject;
     fProjInterface: ICECommonProject;
@@ -35,19 +35,21 @@ type
     fExp: ICEExplorer;
     fSymbols: array[TCESymbol] of string;
     procedure updateSymbols;
-    //
+
     procedure projNew(project: ICECommonProject);
     procedure projClosing(project: ICECommonProject);
     procedure projFocused(project: ICECommonProject);
     procedure projChanged(project: ICECommonProject);
     procedure projCompiling(project: ICECommonProject);
     procedure projCompiled(project: ICECommonProject; success: boolean);
-    //
+
     procedure docNew(document: TCESynMemo);
     procedure docClosing(document: TCESynMemo);
     procedure docFocused(document: TCESynMemo);
     procedure docChanged(document: TCESynMemo);
-    //
+
+    procedure mnexDirectoryChanged(const directory: string);
+
     function singleServiceName: string;
     function expand(const value: string): string;
   public
@@ -163,6 +165,11 @@ begin
     exit;
   fNeedUpdate := true;
 end;
+
+procedure TCESymbolExpander.mnexDirectoryChanged(const directory: string);
+begin
+  fNeedUpdate := true;
+end;
 {$ENDREGION}
 
 {$REGION Symbol things ---------------------------------------------------------}
@@ -178,9 +185,8 @@ var
 const
   na = '``';
 begin
-  //commented : mini explorer doesn't emitt notif,
-  //if not fNeedUpdate then
-  //  exit;
+  if not fNeedUpdate then
+    exit;
   fNeedUpdate := false;
 
   hasNativeProj := fProj.isNotNil;