Make minimum width of tabs dynamic on iOS.

ios/chrome/browser/ui/tabs/tab_strip_controller.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/ui/tabs/tab_strip_controller.h"
 #import "ios/chrome/browser/ui/tabs/tab_strip_controller_private.h"
 
 #include <cmath>
 #include <vector>
 
@@ skipping 52 matching lines @@
 
 // Amount of time needed to trigger drag and drop mode when long pressing.
 const NSTimeInterval kDragAndDropLongPressDuration = 0.4;
 
 // Tab dimensions.
 const CGFloat kTabOverlap = 26.0;
 const CGFloat kTabOverlapForCompactLayout = 30.0;
 
 const CGFloat kNewTabOverlap = 8.0;
 const CGFloat kMaxTabWidth = 265.0;
+const CGFloat kMaxTabWidthForCompactLayout = 225.0;
 
 // Toggle button dimensions.
 const CGFloat kModeToggleButtonWidth = 36.0;
 const CGFloat kTabSwitcherToggleButtonWidth = 46.0;
 const CGFloat kModeToggleButtonBackgroundWidth = 62.0;
 
 const CGFloat kNewTabRightPadding = 4.0;
 const CGFloat kMinTabWidth = 200.0;
 const CGFloat kMinTabWidthForCompactLayout = 160.0;
 
@@ skipping 226 matching lines @@
 // flag so that the layout will be animated.
 - (void)setNeedsLayoutWithAnimation;
 
 // Returns the maximum number of collapsed tabs depending on the current layout
 // mode.
 - (NSUInteger)maxNumCollapsedTabs;
 
 // Returns the tab overlap width depending on the current layout mode.
 - (CGFloat)tabOverlap;
 
+// Returns the maximum tab view width depending on the current layout mode.
+- (CGFloat)maxTabWidth;
+
 // Returns the minimum tab view width depending on the current layout mode.
 - (CGFloat)minTabWidth;
 
 // Automatically scroll the tab strip view to keep the newly inserted tab view
 // visible.
 // This method must be called with a valid |tabIndex|.
 - (void)autoScrollForNewTab:(NSUInteger)tabIndex;
 
 // Updates the content offset of the tab strip view in order to keep the
 // selected tab view visible.
@@ skipping 863 matching lines @@
 - (void)updateContentSizeAndRepositionViews {
   // TODO(rohitrao): The following lines are duplicated in
   // layoutTabStripSubviews.  Find a way to consolidate this logic.
   const NSUInteger tabCount = [_tabArray count] - [_closingTabs count];
   if (!tabCount)
     return;
   const CGFloat tabHeight = CGRectGetHeight([_tabStripView bounds]);
   CGFloat visibleSpace = [self tabStripVisibleSpace];
   _currentTabWidth =
       (visibleSpace + ([self tabOverlap] * (tabCount - 1))) / tabCount;
-  _currentTabWidth = MIN(_currentTabWidth, kMaxTabWidth);
+  _currentTabWidth = MIN(_currentTabWidth, [self maxTabWidth]);
   _currentTabWidth = MAX(_currentTabWidth, [self minTabWidth]);
 
   // Set the content size to be large enough to contain all the tabs at the
   // desired width, with the standard overlap, plus the new tab button.
   CGSize contentSize = CGSizeMake(
       _currentTabWidth * tabCount - ([self tabOverlap] * (tabCount - 1)) +
           CGRectGetWidth([_buttonNewTab frame]) - kNewTabOverlap,
       tabHeight);
   if (CGSizeEqualToSize([_tabStripView contentSize], contentSize))
     return;
@@ skipping 39 matching lines @@
 
 - (NSUInteger)maxNumCollapsedTabs {
   return IsCompactTablet() ? kMaxNumCollapsedTabsForCompactLayout
                            : kMaxNumCollapsedTabs;
 }
 
 - (CGFloat)tabOverlap {
   return IsCompactTablet() ? kTabOverlapForCompactLayout : kTabOverlap;
 }
 
+- (CGFloat)maxTabWidth {
+  return IsCompactTablet() ? kMaxTabWidthForCompactLayout : kMaxTabWidth;
+}
+
 - (CGFloat)minTabWidth {
   return IsCompactTablet() ? kMinTabWidthForCompactLayout : kMinTabWidth;
 }
 
 - (void)autoScrollForNewTab:(NSUInteger)tabIndex {
   DCHECK_NE(NSNotFound, static_cast<NSInteger>(tabIndex));
 
   // The following code calculates the amount of scroll needed to make
   // |tabIndex| visible in the "virtual" coordinate system, where root is x=0
   // and it contains all the tabs laid out as if the tabstrip was infinitely
@@ skipping 450 matching lines @@
 
 @implementation TabStripController (Testing)
 
 - (TabView*)existingTabViewForTab:(Tab*)tab {
   NSUInteger tabIndex = [_tabModel indexOfTab:tab];
   NSUInteger tabViewIndex = [self indexForModelIndex:tabIndex];
   return [_tabArray objectAtIndex:tabViewIndex];
 }
 
 @end