Work in progress: Text selection handling for iOS

Change-Id: I31c6bcb9a4b26653d439601f78d71fd94d938eeb

3 files changed, 198 insertions, 13 deletions

diff --git a/ios/experimental/LibreOffice/LibreOffice/AppDelegate.m b/ios/experimental/LibreOffice/LibreOffice/AppDelegate.m
index c3ed9ebb7832..b4d027e44620 100644
--- a/ios/experimental/LibreOffice/LibreOffice/AppDelegate.m
+++ b/ios/experimental/LibreOffice/LibreOffice/AppDelegate.m
@@ -219,4 +219,33 @@ bool touch_ui_keyboard_visible()
     return keyboardShows;
 }
 
+void touch_ui_selection_start(MLOSelectionKind kind,
+                              const void *documentHandle,
+                              MLORect *rectangles,
+                              int rectangleCount,
+                              void *preview)
+{
+    (void) preview;
+
+    // Note that this is called on the LO thread
+    NSLog(@"==> touch_ui_selection_start");
+    for(int i = 0; i < rectangleCount; ++i){
+        NSLog(@"  %fx%f@(%f,%f)",
+              rectangles[i].size.width,
+              rectangles[i].size.height,
+              rectangles[i].origin.x,
+              rectangles[i].origin.y);
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+            [theView startSelectionOfType:kind withNumber:rectangleCount ofRectangles:rectangles forDocument:documentHandle];
+        });
+}
+
+void touch_ui_selection_none()
+{
+    dispatch_async(dispatch_get_main_queue(), ^{
+            [theView startSelectionOfType:MLOSelectionNone withNumber:0 ofRectangles:NULL forDocument:NULL];
+        });
+}
+
 // vim:set shiftwidth=4 softtabstop=4 expandtab:
diff --git a/ios/experimental/LibreOffice/LibreOffice/View.h b/ios/experimental/LibreOffice/LibreOffice/View.h
index f036c488c338..aecc606425be 100644
--- a/ios/experimental/LibreOffice/LibreOffice/View.h
+++ b/ios/experimental/LibreOffice/LibreOffice/View.h
@@ -9,6 +9,8 @@
 
 #import <UIKit/UIKit.h>
 
+#import <touch/touch.h>
+
 @interface View : UIView
 {
 @public
@@ -18,6 +20,7 @@
 - (void)tapGesture:(UITapGestureRecognizer *)gestureRecognizer;
 - (void)panGesture:(UIPanGestureRecognizer *)gestureRecognizer;
 - (void)longPressGesture:(UILongPressGestureRecognizer *)gestureRecognizer;
+- (void)startSelectionOfType:(MLOSelectionKind)kind withNumber:(int)number ofRectangles:(CGRect *)rects forDocument:(const void *)document;
 
 @end
 
diff --git a/ios/experimental/LibreOffice/LibreOffice/View.m b/ios/experimental/LibreOffice/LibreOffice/View.m
index de7b31144ac3..2e5f3ef26e73 100644
--- a/ios/experimental/LibreOffice/LibreOffice/View.m
+++ b/ios/experimental/LibreOffice/LibreOffice/View.m
@@ -10,15 +10,112 @@
 
 #include <touch/touch.h>
 
+@interface View ()
+@property const void *documentHandle;
+@property CGRect *selectionRectangles;
+@property int selectionRectangleCount;
+@end
+
+#define HANDLE_BLOB 20
+#define HANDLE_STEM_WIDTH 6
+#define HANDLE_STEM_HEIGHT 20
+
 @implementation View
 
+#if 0
+- (id) initWithFrame:(CGRect)rect
+{
+    self = [super initWithFrame:rect];
+    if (self) {
+        self.selectionRectangles = NULL;
+        self.selectionRectangleCount = 0;
+    }
+    return self;
+}
+#endif
+
+- (CGRect) topLeftResizeHandle
+{
+    if (self.selectionRectangleCount == 0)
+        return CGRectNull;
+
+    return CGRectMake(self.selectionRectangles[0].origin.x - HANDLE_STEM_WIDTH/2 - HANDLE_BLOB/2,
+                      self.selectionRectangles[0].origin.y - HANDLE_STEM_HEIGHT - HANDLE_BLOB,
+                      HANDLE_BLOB, HANDLE_BLOB);
+}
+
+- (CGRect) bottomRightResizeHandle
+{
+    const int N = self.selectionRectangleCount;
+
+    if (N == 0)
+        return CGRectNull;
+
+    return CGRectMake(self.selectionRectangles[N-1].origin.x +
+                      self.selectionRectangles[N-1].size.width + HANDLE_STEM_WIDTH/2 - HANDLE_BLOB/2,
+                      self.selectionRectangles[N-1].origin.y +
+                      self.selectionRectangles[N-1].size.height + HANDLE_STEM_HEIGHT,
+                      HANDLE_BLOB, HANDLE_BLOB);
+}
+
+- (void) requestSelectionRedisplay
+{
+    if (self.selectionRectangleCount == 0)
+        return;
+
+    CGRect r = CGRectNull;
+    for (int i = 0; i < self.selectionRectangleCount; i++) {
+        r = CGRectUnion(r, self.selectionRectangles[i]);
+    }
+    r = CGRectUnion(r, [self topLeftResizeHandle]);
+    r = CGRectUnion(r, [self bottomRightResizeHandle]);
+
+    [self setNeedsDisplayInRect:r];
+}
+
+- (void) drawSelectionIntoContext:(CGContextRef)context
+{
+    if (self.selectionRectangleCount == 0)
+        return;
+
+    const int N = self.selectionRectangleCount;
+
+    CGContextSetFillColorWithColor(context, [[UIColor colorWithRed:0 green:0 blue:1 alpha:0.5] CGColor]);
+
+#if 0
+    for (int i = 0; i < N; i++) {
+        NSLog(@"UIRectFill: %fx%f@(%f,%f)",
+              self.selectionRectangles[i].size.width, self.selectionRectangles[i].size.height,
+              self.selectionRectangles[i].origin.x, self.selectionRectangles[i].origin.y);
+        UIRectFillUsingBlendMode(CGRectMake(self.selectionRectangles[i].origin.x, self.selectionRectangles[i].origin.y,
+                                            self.selectionRectangles[i].size.width, self.selectionRectangles[i].size.height),
+                                 kCGBlendModeNormal);
+    }
+#else
+    CGContextSetBlendMode(context, kCGBlendModeNormal);
+    CGContextFillRects(context, self.selectionRectangles, self.selectionRectangleCount);
+#endif
+
+    CGContextFillRect(context,
+                      CGRectMake(self.selectionRectangles[0].origin.x - HANDLE_STEM_WIDTH,
+                                 self.selectionRectangles[0].origin.y - HANDLE_STEM_HEIGHT,
+                                 HANDLE_STEM_WIDTH, self.selectionRectangles[0].size.height + HANDLE_STEM_HEIGHT));
+
+    CGContextFillRect(context,
+                      CGRectMake(self.selectionRectangles[N-1].origin.x +
+                                 self.selectionRectangles[N-1].size.width,
+                                 self.selectionRectangles[N-1].origin.y,
+                                 HANDLE_STEM_WIDTH, self.selectionRectangles[N-1].size.height + HANDLE_STEM_HEIGHT));
+
+    CGContextFillEllipseInRect(context, [self topLeftResizeHandle]);
+    CGContextFillEllipseInRect(context, [self bottomRightResizeHandle]);
+}
+
 - (void)drawRect:(CGRect)rect
 {
-    // NSLog(@"drawRect: %dx%d@(%d,%d)", (int) rect.size.width, (int) rect.size.height, (int) rect.origin.x, (int) rect.origin.y);
+    NSLog(@"View drawRect: %dx%d@(%d,%d)", (int) rect.size.width, (int) rect.size.height, (int) rect.origin.x, (int) rect.origin.y);
     // NSLog(@"statusBarOrientation: %ld", (long)[[UIApplication sharedApplication] statusBarOrientation]);
 
-    // NSDate *startDate = [NSDate date];
-
     CGContextRef context = UIGraphicsGetCurrentContext();
     CGContextSaveGState(context);
 
@@ -41,15 +138,23 @@
         break;
     }
     touch_lo_render_windows(context, rect.origin.y, rect.origin.y, rect.size.width, rect.size.height);
+
     CGContextRestoreGState(context);
 
-    // NSLog(@"drawRect: touch_lo_render_windows took %f s", [[NSDate date] timeIntervalSinceDate: startDate]);
+    [self drawSelectionIntoContext:context];
 }
 
+#if 0
+- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
+{
+    NSLog(@"===> View touchesBegan!");
+}
+#endif
+
 - (void)tapGesture:(UITapGestureRecognizer *)gestureRecognizer
 {
     if ([gestureRecognizer state] == UIGestureRecognizerStateEnded) {
-        CGPoint location = [gestureRecognizer locationInView: self];
+        CGPoint location = [gestureRecognizer locationInView:self];
 
         // NSLog(@"tapGesture: at: (%d,%d)", (int)location.x, (int)location.y);
 
@@ -63,7 +168,37 @@
 {
     static CGFloat previousX = 0.0f, previousY = 0.0f;
 
-    CGPoint translation = [gestureRecognizer translationInView: self];
+    CGPoint translation = [gestureRecognizer translationInView:self];
+
+    if ([gestureRecognizer numberOfTouches] == 1) {
+        if (CGRectContainsPoint([self topLeftResizeHandle],
+                                [gestureRecognizer locationInView:self])) {
+
+            self.selectionRectangles[0].origin.x += translation.x;
+            self.selectionRectangles[0].origin.y += translation.y;
+            self.selectionRectangles[0].size.width -= translation.x;
+            self.selectionRectangles[0].size.height -= translation.y;
+
+            touch_lo_selection_attempt_resize(self.documentHandle,
+                                              self.selectionRectangles,
+                                              self.selectionRectangleCount);
+            return;
+        } else if (CGRectContainsPoint([self bottomRightResizeHandle],
+                                       [gestureRecognizer locationInView:self])) {
+
+            const int N = self.selectionRectangleCount - 1;
+
+            self.selectionRectangles[N].origin.x += translation.x;
+            self.selectionRectangles[N].origin.y += translation.y;
+            self.selectionRectangles[N].size.width -= translation.x;
+            self.selectionRectangles[N].size.height -= translation.y;
+
+            touch_lo_selection_attempt_resize(self.documentHandle,
+                                              self.selectionRectangles,
+                                              self.selectionRectangleCount);
+            return;
+        }
+    }
 
     if (gestureRecognizer.state != UIGestureRecognizerStateBegan) {
         int deltaX = translation.x - previousX;
@@ -80,7 +215,7 @@
 
 - (void)pinchGesture:(UIPinchGestureRecognizer *)gestureRecognizer
 {
-    CGPoint location = [gestureRecognizer locationInView: self];
+    CGPoint location = [gestureRecognizer locationInView:self];
     CGFloat scale = gestureRecognizer.scale;
 
     // NSLog(@"pinchGesture: pinch: (%f) cords (%d,%d)", (float)scale, (int)location.x, (int)location.y );
@@ -88,7 +223,7 @@
     touch_lo_zoom((int)location.x, (int)location.y, (float)scale);
 
     // to reset the gesture scaling
-    if (gestureRecognizer.state==UIGestureRecognizerStateEnded) {
+    if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
         touch_lo_zoom(1, 1, 0.0f);
     }
 }
@@ -97,16 +232,34 @@
 {
     CGPoint point = [gestureRecognizer locationInView:self];
 
-    UIGestureRecognizerState state = gestureRecognizer.state;
-
-    // NSLog(@"longPressGesture: state %d cords (%d,%d)",state ,(int)point.x,(int)point.y);
-
-    if (state == UIGestureRecognizerStateEnded) {
+    if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
         touch_lo_tap(point.x, point.y);
         touch_lo_tap(point.x, point.y);
     }
 }
 
+- (void)startSelectionOfType:(MLOSelectionKind)kind withNumber:(int)number ofRectangles:(CGRect *)rects forDocument:(const void *)document
+{
+    (void) kind;
+
+    // First request the old selection area to be redisplayed
+    [self requestSelectionRedisplay];
+
+    free(self.selectionRectangles);
+    self.selectionRectangles = NULL;
+    self.selectionRectangleCount = 0;
+    self.documentHandle = NULL;
+
+    if (number == 0)
+        return;
+
+    self.selectionRectangles = rects;
+    self.selectionRectangleCount = number;
+    self.documentHandle = document;
+
+    [self requestSelectionRedisplay];
+}
+
 @end
 
 // vim:set shiftwidth=4 softtabstop=4 expandtab: