From df2e95e1470c73ed44bfa2cfe1c65d68bcb4e5c9 Mon Sep 17 00:00:00 2001
From: Victor Cebollada <v.cebollada@samsung.com>
Date: Mon, 6 Jul 2015 09:46:11 +0100
Subject: [PATCH] Fix for cursor position when there is no text and no place
 holder text.

* When there are no characters, the line height of the default
  font is used to align the text.

Change-Id: I3f7506bac0fe4afd6ccd3fb88e80e449d1e73af7
Signed-off-by: Victor Cebollada <v.cebollada@samsung.com>
---
 .../internal/text/text-controller-impl.cpp         | 38 ++++++++++++----------
 dali-toolkit/internal/text/text-controller-impl.h  |  5 +++
 dali-toolkit/internal/text/text-controller.cpp     |  7 +++-
 3 files changed, 32 insertions(+), 18 deletions(-)

diff --git a/dali-toolkit/internal/text/text-controller-impl.cpp b/dali-toolkit/internal/text/text-controller-impl.cpp
index f743c25..dd6ea63 100644
--- a/dali-toolkit/internal/text/text-controller-impl.cpp
+++ b/dali-toolkit/internal/text/text-controller-impl.cpp
@@ -441,6 +441,25 @@ void Controller::Impl::GetDefaultFonts( Vector<FontRun>& fonts, Length numberOfC
   }
 }
 
+float Controller::Impl::GetDefaultFontLineHeight()
+{
+  FontId defaultFontId = 0u;
+  if( NULL == mFontDefaults )
+  {
+    defaultFontId = mFontClient.GetFontId( EMPTY_STRING,
+                                           EMPTY_STRING );
+  }
+  else
+  {
+    defaultFontId = mFontDefaults->GetFontId( mFontClient );
+  }
+
+  Text::FontMetrics fontMetrics;
+  mFontClient.GetFontMetrics( defaultFontId, fontMetrics );
+
+  return( fontMetrics.ascender - fontMetrics.descender );
+}
+
 void Controller::Impl::OnCursorKeyEvent( const Event& event )
 {
   if( NULL == mEventData )
@@ -1338,23 +1357,8 @@ void Controller::Impl::GetCursorPosition( CharacterIndex logical,
 
   if( isFirstPosition && isLastPosition )
   {
-    // There is zero characters. Get the default font.
-
-    FontId defaultFontId = 0u;
-    if( NULL == mFontDefaults )
-    {
-      defaultFontId = mFontClient.GetFontId( EMPTY_STRING,
-                                             EMPTY_STRING );
-    }
-    else
-    {
-      defaultFontId = mFontDefaults->GetFontId( mFontClient );
-    }
-
-    Text::FontMetrics fontMetrics;
-    mFontClient.GetFontMetrics( defaultFontId, fontMetrics );
-
-    cursorInfo.lineHeight = fontMetrics.ascender - fontMetrics.descender;
+    // There is zero characters. Get the default font's line height.
+    cursorInfo.lineHeight = GetDefaultFontLineHeight();
     cursorInfo.primaryCursorHeight = cursorInfo.lineHeight;
 
     cursorInfo.primaryPosition.x = 1.f;
diff --git a/dali-toolkit/internal/text/text-controller-impl.h b/dali-toolkit/internal/text/text-controller-impl.h
index 434a1e0..426cc60 100644
--- a/dali-toolkit/internal/text/text-controller-impl.h
+++ b/dali-toolkit/internal/text/text-controller-impl.h
@@ -330,6 +330,11 @@ struct Controller::Impl
    */
   void GetDefaultFonts( Dali::Vector<FontRun>& fonts, Length numberOfCharacters );
 
+  /**
+   * @brief Retrieve the line height of the default font.
+   */
+  float GetDefaultFontLineHeight();
+
   void OnCursorKeyEvent( const Event& event );
 
   void OnTapEvent( const Event& event );
diff --git a/dali-toolkit/internal/text/text-controller.cpp b/dali-toolkit/internal/text/text-controller.cpp
index 3b9c725..68555b7 100644
--- a/dali-toolkit/internal/text/text-controller.cpp
+++ b/dali-toolkit/internal/text/text-controller.cpp
@@ -1016,7 +1016,12 @@ void Controller::CalculateTextAlignment( const Size& size )
   // Get the direction of the first character.
   const CharacterDirection firstParagraphDirection = mImpl->mLogicalModel->GetCharacterDirection( 0u );
 
-  const Size& actualSize = mImpl->mVisualModel->GetActualSize();
+  Size actualSize = mImpl->mVisualModel->GetActualSize();
+  if( fabsf( actualSize.height ) < Math::MACHINE_EPSILON_1000 )
+  {
+    // Get the line height of the default font.
+    actualSize.height = mImpl->GetDefaultFontLineHeight();
+  }
 
   // If the first paragraph is right to left swap ALIGN_BEGIN and ALIGN_END;
   LayoutEngine::HorizontalAlignment horizontalAlignment = mImpl->mLayoutEngine.GetHorizontalAlignment();
-- 
2.7.4