From 39da2707a6a6b76151d0dfd4bee04c757ca79f44 Mon Sep 17 00:00:00 2001
From: Zoia Pribytkova <niakris90@gmail.com>
Date: Thu, 25 Jul 2019 17:37:10 +0300
Subject: [PATCH] [iOS] Added image resize for bookmarks and guide descriptions

---
 iphone/Maps/Bookmarks/MWMCategoryInfoCell.mm  |  9 ++--
 .../Categories/NSAttributedString+HTML.swift  | 54 +++++++++++++++++--
 .../Content/BookmarkCell/MWMBookmarkCell.mm   |  4 +-
 3 files changed, 60 insertions(+), 7 deletions(-)

diff --git a/iphone/Maps/Bookmarks/MWMCategoryInfoCell.mm b/iphone/Maps/Bookmarks/MWMCategoryInfoCell.mm
index 5486c73b44..838ee9df0a 100644
--- a/iphone/Maps/Bookmarks/MWMCategoryInfoCell.mm
+++ b/iphone/Maps/Bookmarks/MWMCategoryInfoCell.mm
@@ -55,9 +55,12 @@
   self.authorLabel.text = [NSString stringWithCoreFormat:L(@"author_name_by_prefix")
                                                arguments:@[@(data.m_authorName.c_str())]];
   auto infoHtml = @(GetPreferredBookmarkStr(data.m_description).c_str());
-  auto info = [NSAttributedString stringWithHtml:infoHtml
-                               defaultAttributes: @{NSFontAttributeName : [UIFont regular14],
-                                                    NSForegroundColorAttributeName: [UIColor blackPrimaryText]}];
+  auto info = [[NSMutableAttributedString alloc] initWithHtmlString:infoHtml
+                                                           baseFont:[UIFont regular14]
+                                                     estimatedWidth:[UIScreen mainScreen].bounds.size.width - 32.0f];
+  [info addAttribute: NSForegroundColorAttributeName
+               value:[UIColor blackPrimaryText]
+               range:NSMakeRange(0, [info length])];
   auto shortInfo = @(GetPreferredBookmarkStr(data.m_annotation).c_str());
   if (info.length > 0 && shortInfo.length > 0)
   {
diff --git a/iphone/Maps/Categories/NSAttributedString+HTML.swift b/iphone/Maps/Categories/NSAttributedString+HTML.swift
index 49ca56c283..a629f7a3d5 100644
--- a/iphone/Maps/Categories/NSAttributedString+HTML.swift
+++ b/iphone/Maps/Categories/NSAttributedString+HTML.swift
@@ -32,14 +32,62 @@ extension NSMutableAttributedString {
       return nil
     }
 
+    enumerateFont(baseFont)
+  }
+  
+  @objc convenience init?(htmlString: String, baseFont: UIFont, estimatedWidth: CGFloat) {
+    guard let data = htmlString.data(using: .utf8) else { return nil }
+    
+    do {
+      try self.init(data: data,
+                    options: [.documentType : NSAttributedString.DocumentType.html,
+                              .characterEncoding: String.Encoding.utf8.rawValue],
+                    documentAttributes: nil)
+    } catch {
+      return nil
+    }
+    
+    enumerateFont(baseFont)
+    
+    guard estimatedWidth > 0 else { return }
+    
+    enumerateAttachments(estimatedWidth: estimatedWidth)
+  }
+  
+  func enumerateFont(_ font: UIFont) {
     enumerateAttribute(.font, in: NSMakeRange(0, length), options: []) { (value, range, _) in
       if let font = value as? UIFont,
-        let descriptor = baseFont.fontDescriptor.withSymbolicTraits(font.fontDescriptor.symbolicTraits) {
-        let newFont = UIFont(descriptor: descriptor, size: baseFont.pointSize)
+        let descriptor = font.fontDescriptor.withSymbolicTraits(font.fontDescriptor.symbolicTraits) {
+        let newFont = UIFont(descriptor: descriptor, size: font.pointSize)
         addAttribute(.font, value: newFont, range: range)
       } else {
-        addAttribute(.font, value: baseFont, range: range)
+        addAttribute(.font, value: font, range: range)
       }
     }
   }
+  
+  func enumerateAttachments(estimatedWidth: CGFloat) {
+    enumerateAttribute(.attachment, in: NSMakeRange(0, length), options: []) { (value, range, _) in
+      if let attachement = value as? NSTextAttachment {
+        let image = attachement.image(forBounds: attachement.bounds, textContainer: NSTextContainer(), characterIndex: range.location)!
+        if image.size.width > estimatedWidth {
+          let newImage = resizeImage(image: image, scale: estimatedWidth/image.size.width) ?? image
+          let resizedAttachment = NSTextAttachment()
+          resizedAttachment.image = newImage
+          addAttribute(.attachment, value: resizedAttachment, range: range)
+        }
+      }
+    }
+  }
+  
+  func resizeImage(image: UIImage, scale: CGFloat) -> UIImage? {
+    let newSize = CGSize(width: image.size.width*scale, height: image.size.height*scale)
+    let rect = CGRect(origin: CGPoint.zero, size: newSize)
+
+    let renderer = UIGraphicsImageRenderer(size: newSize)
+    let newImage = renderer.image { context in
+      image.draw(in: rect)
+    }
+    return newImage
+  }
 }
diff --git a/iphone/Maps/UI/PlacePage/PlacePageLayout/Content/BookmarkCell/MWMBookmarkCell.mm b/iphone/Maps/UI/PlacePage/PlacePageLayout/Content/BookmarkCell/MWMBookmarkCell.mm
index d12bfa2069..c0f77a53e2 100644
--- a/iphone/Maps/UI/PlacePage/PlacePageLayout/Content/BookmarkCell/MWMBookmarkCell.mm
+++ b/iphone/Maps/UI/PlacePage/PlacePageLayout/Content/BookmarkCell/MWMBookmarkCell.mm
@@ -130,7 +130,9 @@ NSString * const kTextViewContentSizeKeyPath = @"contentSize";
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
       auto font = [UIFont regular16];
       auto color = [UIColor blackPrimaryText];
-      auto str = [[NSMutableAttributedString alloc] initWithHtmlString:text baseFont:font];
+      auto str = [[NSMutableAttributedString alloc] initWithHtmlString:text
+                                                              baseFont:font
+                                                        estimatedWidth:[UIScreen mainScreen].bounds.size.width - 32.0f];
       if (str)
       {
         [str addAttribute:NSForegroundColorAttributeName value:color range:NSMakeRange(0, str.length)];