Enable AutoResize for Constrained Web Dialogs

chrome/browser/ui/views/constrained_web_dialog_delegate_views.cc

Index: chrome/browser/ui/views/constrained_web_dialog_delegate_views.cc
diff --git a/chrome/browser/ui/views/constrained_web_dialog_delegate_views.cc b/chrome/browser/ui/views/constrained_web_dialog_delegate_views.cc
index c98917173b820a6ed5319febb73e00ea237ce188..1ec88be0820addb871d0684ba2307dbfd6fe8510 100644
--- a/chrome/browser/ui/views/constrained_web_dialog_delegate_views.cc
+++ b/chrome/browser/ui/views/constrained_web_dialog_delegate_views.cc
@@ -9,10 +9,13 @@
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/webui/chrome_web_contents_handler.h"
 #include "components/constrained_window/constrained_window_views.h"
+#include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "content/public/browser/native_web_keyboard_event.h"
+#include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/views/controls/webview/unhandled_keyboard_event_handler.h"
 #include "ui/views/controls/webview/webview.h"
+#include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/dialog_delegate.h"
 #include "ui/web_dialogs/web_dialog_delegate.h"
@@ -52,6 +55,16 @@ class WebDialogWebContentsDelegateViews
 #endif
   }
 
+  void ResizeDueToAutoResize(content::WebContents* source,
+                             const gfx::Size& preferred_size) override {
+    web_view_->SetPreferredSize(preferred_size);
+
+    constrained_window::UpdateWebContentsModalDialogPosition(
+        web_view_->GetWidget(),
+        web_modal::WebContentsModalDialogManager::FromWebContents(
+            initiator_)->delegate()->GetWebContentsModalDialogHost());
+  }
+
  private:
   content::WebContents* initiator_;
   views::WebView* web_view_;
@@ -107,13 +120,18 @@ class ConstrainedWebDialogDelegateViewViews
   ConstrainedWebDialogDelegateViewViews(
       content::BrowserContext* browser_context,
       ui::WebDialogDelegate* delegate,
-      content::WebContents* web_contents)
+      content::WebContents* web_contents,
+      const gfx::Size& min_size,
+      const gfx::Size& max_size)
       : views::WebView(browser_context),
         impl_(new ConstrainedWebDialogDelegateViews(browser_context, delegate,
-                                                    web_contents, this)) {
+                                                    web_contents, this)),
+        initiator_web_contents_(web_contents),

[sky, 2014/12/02 15:55:40]

What is the lifetime of this WebContents?

[apacible, 2014/12/09 17:07:58]

The WebContents are destroyed before ConstrainedWebDialogDelegateViewViews
teardown. I made a modification to use a WebContentsObserver to keep track of
whether the WebContents still exist.

+        min_size_(min_size),
+        max_size_(max_size) {
     SetWebContents(GetWebContents());
     AddAccelerator(ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE));
-  }
+   }
   ~ConstrainedWebDialogDelegateViewViews() override {}
 
   // ConstrainedWebDialogDelegate:
@@ -168,30 +186,79 @@ class ConstrainedWebDialogDelegateViewViews
   }
   gfx::Size GetPreferredSize() const override {
     gfx::Size size;
-    if (!impl_->closed_via_webui())
-      GetWebDialogDelegate()->GetDialogSize(&size);
+    if (!impl_->closed_via_webui()) {
+      size = WebView::GetPreferredSize();
+      if (size.IsEmpty())
+        GetWebDialogDelegate()->GetDialogSize(&size);
+    }
     return size;
   }
   gfx::Size GetMinimumSize() const override {
-    // Return an empty size so that we can be made smaller.
-    return gfx::Size();
+    return min_size_;
+  }
+  gfx::Size GetMaximumSize() const override {
+    return !max_size_.IsEmpty() ? max_size_ : WebView::GetMaximumSize();
+  }
+  void RenderViewCreated(content::RenderViewHost* render_view_host) override {
+    if (!max_size_.IsEmpty())
+      EnableAutoResize();
+  }
+  void RenderViewHostChanged(content::RenderViewHost* old_host,
+                             content::RenderViewHost* new_host) override {
+    if (!max_size_.IsEmpty())
+      EnableAutoResize();
+  }
+  void DocumentOnLoadCompletedInMainFrame() override {
+    if (!max_size_.IsEmpty()) {
+      EnableAutoResize();
+      constrained_window::ShowWebModalDialogViews(this,
+          initiator_web_contents_);
+    }
   }
 
  private:
   scoped_ptr<ConstrainedWebDialogDelegateViews> impl_;
 
+  content::WebContents* const initiator_web_contents_;
+
+  const gfx::Size min_size_;
+  const gfx::Size max_size_;
+
+  void EnableAutoResize() {

[sky, 2014/12/02 15:55:40]

functions before members.

[apacible, 2014/12/09 17:07:58]

Done.

+    content::RenderViewHost* render_view_host =
+        GetWebContents()->GetRenderViewHost();
+    render_view_host->EnableAutoResize(min_size_, max_size_);
+  }
+
   DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateViewViews);
 };
 
 }  // namespace
 
-ConstrainedWebDialogDelegate* CreateConstrainedWebDialog(
+ConstrainedWebDialogDelegate* ShowConstrainedWebDialog(
     content::BrowserContext* browser_context,
     ui::WebDialogDelegate* delegate,
     content::WebContents* web_contents) {
   ConstrainedWebDialogDelegateViewViews* dialog =
       new ConstrainedWebDialogDelegateViewViews(
-          browser_context, delegate, web_contents);
+          browser_context, delegate, web_contents,
+          gfx::Size(), gfx::Size());
   constrained_window::ShowWebModalDialogViews(dialog, web_contents);
   return dialog;
 }
+
+ConstrainedWebDialogDelegate* CreateConstrainedWebDialogWithAutoResize(
+    content::BrowserContext* browser_context,
+    ui::WebDialogDelegate* delegate,
+    content::WebContents* web_contents,
+    gfx::Size min_size,

[sky, 2014/12/02 15:55:40]

const gfx::Size&

[apacible, 2014/12/09 17:07:58]

Done.

+    gfx::Size max_size) {
+  DCHECK(!min_size.IsEmpty());
+  DCHECK(!max_size.IsEmpty());
+  ConstrainedWebDialogDelegateViewViews* dialog =
+      new ConstrainedWebDialogDelegateViewViews(
+          browser_context, delegate, web_contents,
+          min_size, max_size);
+  constrained_window::CreateWebModalDialogViews(dialog, web_contents);
+  return dialog;
+}