Splitting fpdfdoc/doc_* part III.

core/fpdfdoc/cpdf_defaultappearance.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/fpdfdoc/include/cpdf_defaultappearance.h"
+
+#include "core/fpdfapi/fpdf_parser/include/cpdf_simple_parser.h"
+#include "core/fpdfapi/fpdf_parser/include/fpdf_parser_decode.h"
+#include "core/fpdfdoc/include/cpdf_formcontrol.h"
+
+FX_BOOL CPDF_DefaultAppearance::HasFont() {
+  if (m_csDA.IsEmpty())
+    return FALSE;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  return syntax.FindTagParamFromStart("Tf", 2);
+}
+
+CFX_ByteString CPDF_DefaultAppearance::GetFontString() {
+  CFX_ByteString csFont;
+  if (m_csDA.IsEmpty())
+    return csFont;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart("Tf", 2)) {
+    csFont += syntax.GetWord();
+    csFont += " ";
+    csFont += syntax.GetWord();
+    csFont += " ";
+    csFont += syntax.GetWord();
+  }
+  return csFont;
+}
+
+void CPDF_DefaultAppearance::GetFont(CFX_ByteString& csFontNameTag,
+                                     FX_FLOAT& fFontSize) {
+  csFontNameTag = "";
+  fFontSize = 0;
+  if (m_csDA.IsEmpty())
+    return;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart("Tf", 2)) {
+    csFontNameTag = CFX_ByteString(syntax.GetWord());
+    csFontNameTag.Delete(0, 1);
+    fFontSize = FX_atof(syntax.GetWord());
+  }
+  csFontNameTag = PDF_NameDecode(csFontNameTag);
+}
+
+FX_BOOL CPDF_DefaultAppearance::HasColor(PaintOperation nOperation) {
+  if (m_csDA.IsEmpty())
+    return FALSE;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "G" : "g"), 1)) {
+    return TRUE;
+  }
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "RG" : "rg"), 3)) {
+    return TRUE;
+  }
+  return syntax.FindTagParamFromStart(
+      (nOperation == PaintOperation::STROKE ? "K" : "k"), 4);
+}
+
+CFX_ByteString CPDF_DefaultAppearance::GetColorString(
+    PaintOperation nOperation) {
+  CFX_ByteString csColor;
+  if (m_csDA.IsEmpty())
+    return csColor;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "G" : "g"), 1)) {
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+    return csColor;
+  }
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "RG" : "rg"), 3)) {
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+    return csColor;
+  }
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "K" : "k"), 4)) {
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+    csColor += " ";
+    csColor += syntax.GetWord();
+  }
+  return csColor;
+}
+
+void CPDF_DefaultAppearance::GetColor(int& iColorType,
+                                      FX_FLOAT fc[4],
+                                      PaintOperation nOperation) {
+  iColorType = COLORTYPE_TRANSPARENT;
+  for (int c = 0; c < 4; c++)
+    fc[c] = 0;
+
+  if (m_csDA.IsEmpty())
+    return;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "G" : "g"), 1)) {
+    iColorType = COLORTYPE_GRAY;
+    fc[0] = FX_atof(syntax.GetWord());
+    return;
+  }
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "RG" : "rg"), 3)) {
+    iColorType = COLORTYPE_RGB;
+    fc[0] = FX_atof(syntax.GetWord());
+    fc[1] = FX_atof(syntax.GetWord());
+    fc[2] = FX_atof(syntax.GetWord());
+    return;
+  }
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "K" : "k"), 4)) {
+    iColorType = COLORTYPE_CMYK;
+    fc[0] = FX_atof(syntax.GetWord());
+    fc[1] = FX_atof(syntax.GetWord());
+    fc[2] = FX_atof(syntax.GetWord());
+    fc[3] = FX_atof(syntax.GetWord());
+  }
+}
+
+void CPDF_DefaultAppearance::GetColor(FX_ARGB& color,
+                                      int& iColorType,
+                                      PaintOperation nOperation) {
+  color = 0;
+  iColorType = COLORTYPE_TRANSPARENT;
+  if (m_csDA.IsEmpty())
+    return;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "G" : "g"), 1)) {
+    iColorType = COLORTYPE_GRAY;
+    FX_FLOAT g = FX_atof(syntax.GetWord()) * 255 + 0.5f;
+    color = ArgbEncode(255, (int)g, (int)g, (int)g);
+    return;
+  }
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "RG" : "rg"), 3)) {
+    iColorType = COLORTYPE_RGB;
+    FX_FLOAT r = FX_atof(syntax.GetWord()) * 255 + 0.5f;
+    FX_FLOAT g = FX_atof(syntax.GetWord()) * 255 + 0.5f;
+    FX_FLOAT b = FX_atof(syntax.GetWord()) * 255 + 0.5f;
+    color = ArgbEncode(255, (int)r, (int)g, (int)b);
+    return;
+  }
+  if (syntax.FindTagParamFromStart(
+          (nOperation == PaintOperation::STROKE ? "K" : "k"), 4)) {
+    iColorType = COLORTYPE_CMYK;
+    FX_FLOAT c = FX_atof(syntax.GetWord());
+    FX_FLOAT m = FX_atof(syntax.GetWord());
+    FX_FLOAT y = FX_atof(syntax.GetWord());
+    FX_FLOAT k = FX_atof(syntax.GetWord());
+    FX_FLOAT r = 1.0f - std::min(1.0f, c + k);
+    FX_FLOAT g = 1.0f - std::min(1.0f, m + k);
+    FX_FLOAT b = 1.0f - std::min(1.0f, y + k);
+    color = ArgbEncode(255, (int)(r * 255 + 0.5f), (int)(g * 255 + 0.5f),
+                       (int)(b * 255 + 0.5f));
+  }
+}
+
+FX_BOOL CPDF_DefaultAppearance::HasTextMatrix() {
+  if (m_csDA.IsEmpty())
+    return FALSE;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  return syntax.FindTagParamFromStart("Tm", 6);
+}
+
+CFX_ByteString CPDF_DefaultAppearance::GetTextMatrixString() {
+  CFX_ByteString csTM;
+  if (m_csDA.IsEmpty())
+    return csTM;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart("Tm", 6)) {
+    for (int i = 0; i < 6; i++) {
+      csTM += syntax.GetWord();
+      csTM += " ";
+    }
+    csTM += syntax.GetWord();
+  }
+  return csTM;
+}
+
+CFX_Matrix CPDF_DefaultAppearance::GetTextMatrix() {
+  CFX_Matrix tm;
+  if (m_csDA.IsEmpty())
+    return tm;
+
+  CPDF_SimpleParser syntax(m_csDA.AsStringC());
+  if (syntax.FindTagParamFromStart("Tm", 6)) {
+    FX_FLOAT f[6];
+    for (int i = 0; i < 6; i++)
+      f[i] = FX_atof(syntax.GetWord());
+    tm.Set(f[0], f[1], f[2], f[3], f[4], f[5]);
+  }
+  return tm;
+}