chat: custom message selection

Allow user to drag-select multiple messages

Change-Id: I1fcf115822dab791d3df35b29696be3af3800204
Tuleap: #202

CMakeLists.txt

@@ -144,6 +144,8 @@ SET(ringclient_OTHERS
    src/AppDelegate.mm
    src/AppDelegate.h
    src/Constants.h
+   src/INDSequentialTextSelectionManager.mm
+   src/INDSequentialTextSelectionManager.h
    src/delegates/ImageManipulationDelegate.mm
    src/delegates/ImageManipulationDelegate.h)
 

src/ConversationVC.mm

@@ -37,6 +37,7 @@
 #import "views/IMTableCellView.h"
 #import "views/NSColor+RingTheme.h"
 #import "QNSTreeController.h"
+#import "INDSequentialTextSelectionManager.h"
 #import "delegates/ImageManipulationDelegate.h"
 
 #import <QuartzCore/QuartzCore.h>
@@ -58,6 +59,8 @@
     __unsafe_unretained IBOutlet NSPopUpButton* contactMethodsPopupButton;
 }
 
+@property (nonatomic, strong, readonly) INDSequentialTextSelectionManager* selectionManager;
+
 @end
 
 @implementation ConversationVC
@@ -72,6 +75,7 @@
 
     [sendPanel setWantsLayer:YES];
     [sendPanel setLayer:[CALayer layer]];
+    _selectionManager = [[INDSequentialTextSelectionManager alloc] init];
 
     [self setupChat];
 
@@ -95,6 +99,8 @@
                              return ;
                          }
 
+                         [self.selectionManager unregisterAllTextViews];
+
                          [contactMethodsPopupButton removeAllItems];
                          for (auto cm : contactMethods) {
                              [contactMethodsPopupButton addItemWithTitle:cm->uri().toNSString()];
@@ -231,6 +237,10 @@
 
 - (void)outlineView:(NSOutlineView *)outlineView didAddRowView:(NSTableRowView *)rowView forRow:(NSInteger)row
 {
+    if (IMTableCellView* cellView = [outlineView viewAtColumn:0 row:row makeIfNecessary:NO]) {
+        [self.selectionManager registerTextView:cellView.msgView withUniqueIdentifier:@(row).stringValue];
+    }
+
     if (auto txtRecording = contactMethods.at([contactMethodsPopupButton indexOfSelectedItem])->textRecording()) {
         [emptyConversationPlaceHolder setHidden:txtRecording->instantMessagingModel()->rowCount() > 0];
         txtRecording->setAllRead();

src/INDSequentialTextSelectionManager.h

+//
+//  INDSequentialTextSelectionManager.h
+//  INDSequentialTextSelectionManager
+//
+//  Created by Indragie Karunaratne on 2014-03-02.
+//  Copyright (c) 2014 Indragie Karunaratne. All rights reserved.
+//
+#import <Cocoa/Cocoa.h>
+#import <Foundation/Foundation.h>
+
+typedef NSAttributedString * (^INDAttributedTextTransformationBlock)(NSAttributedString *);
+
+/**
+ *  Coordinates sequential text selection among an arbitrary set of `NSTextView`s
+ */
+@interface INDSequentialTextSelectionManager : NSResponder
+
+/**
+ *  Registers a text view to participate in sequential selection.
+ *
+ *  @param textView   The `NSTextView` instance to register.
+ *  @param identifier The unique identifier to associate with the text view instance.
+ */
+- (void)registerTextView:(NSTextView *)textView withUniqueIdentifier:(NSString *)identifier;
+
+/**
+ *  Registers a text view to participate in sequential selection.
+ *
+ *  @param textView   The `NSTextView` instance to register.
+ *  @param identifier The unique identifier to associate with the text view instance.
+ *  @param block      A transformation block to apply to the contents of the text view
+ *  before copying the text.
+ */
+- (void)registerTextView:(NSTextView *)textView withUniqueIdentifier:(NSString *)identifier transformationBlock:(INDAttributedTextTransformationBlock)block;
+
+/**
+ *  Unregisters a text view for sequential text selection.
+ *
+ *  @param textView The text view to unregister.
+ */
+- (void)unregisterTextView:(NSTextView *)textView;
+
+/**
+ *  Unregisters all text views.
+ */
+- (void)unregisterAllTextViews;
+
+@end
\ No newline at end of file