Make CPDF_TextState have a CPDF_TextStateData rather than inheriting one.

core/fpdfapi/fpdf_page/cpdf_textstatedata.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fpdfapi/fpdf_page/include/cpdf_textstatedata.h"
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_page/pageint.h"
@@ skipping 54 matching lines @@
   }
 }
 
 CPDF_TextStateData::~CPDF_TextStateData() {
   if (m_pDocument && m_pFont) {
     CPDF_DocPageData* pPageData = m_pDocument->GetPageData();
     if (pPageData && !pPageData->IsForceClear())
       pPageData->ReleaseFont(m_pFont->GetFontDict());
   }
 }
+
+void CPDF_TextStateData::SetFont(CPDF_Font* pFont) {
+  CPDF_Document* pDoc = m_pDocument;
+  CPDF_DocPageData* pPageData = pDoc ? pDoc->GetPageData() : nullptr;
+  if (pPageData && m_pFont && !pPageData->IsForceClear())
+    pPageData->ReleaseFont(m_pFont->GetFontDict());
+
+  m_pDocument = pFont ? pFont->m_pDocument : nullptr;
+  m_pFont = pFont;
+}
+
+FX_FLOAT CPDF_TextStateData::GetFontSizeV() const {
+  return FXSYS_fabs(FXSYS_sqrt2(m_Matrix[1], m_Matrix[3]) * m_FontSize);
+}
+
+FX_FLOAT CPDF_TextStateData::GetFontSizeH() const {
+  return FXSYS_fabs(FXSYS_sqrt2(m_Matrix[0], m_Matrix[2]) * m_FontSize);
+}
+
+FX_FLOAT CPDF_TextStateData::GetBaselineAngle() const {
+  return FXSYS_atan2(m_Matrix[2], m_Matrix[0]);
+}
+
+FX_FLOAT CPDF_TextStateData::GetShearAngle() const {
+  return GetBaselineAngle() + FXSYS_atan2(m_Matrix[1], m_Matrix[3]);
+}