Move CSS code to core

The xfa/fde/css code has no other links into xfa/. This CL moves the css
code to core/fxcrt/css and sets to only build when pdf_enable_xfa is
enabled.

Change-Id: Iefd208e1f83a28b80b567c574e841e87bce310be
Reviewed-on: https://pdfium-review.googlesource.com/9251
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 140 insertions, 0 deletions

diff --git a/core/fxcrt/css/cfx_cssstylesheet.cpp b/core/fxcrt/css/cfx_cssstylesheet.cpp
new file mode 100644
index 0000000000..9bd25c044f
--- /dev/null
+++ b/core/fxcrt/css/cfx_cssstylesheet.cpp
@@ -0,0 +1,140 @@
+// Copyright 2014 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/fxcrt/css/cfx_cssstylesheet.h"
+
+#include <utility>
+
+#include "core/fxcrt/css/cfx_cssdatatable.h"
+#include "core/fxcrt/css/cfx_cssdeclaration.h"
+#include "core/fxcrt/css/cfx_cssstylerule.h"
+#include "core/fxcrt/fx_codepage.h"
+#include "third_party/base/ptr_util.h"
+#include "third_party/base/stl_util.h"
+
+CFX_CSSStyleSheet::CFX_CSSStyleSheet() {}
+
+CFX_CSSStyleSheet::~CFX_CSSStyleSheet() {
+  Reset();
+}
+
+void CFX_CSSStyleSheet::Reset() {
+  m_RuleArray.clear();
+  m_StringCache.clear();
+}
+
+int32_t CFX_CSSStyleSheet::CountRules() const {
+  return pdfium::CollectionSize<int32_t>(m_RuleArray);
+}
+
+CFX_CSSStyleRule* CFX_CSSStyleSheet::GetRule(int32_t index) const {
+  return m_RuleArray[index].get();
+}
+
+bool CFX_CSSStyleSheet::LoadBuffer(const wchar_t* pBuffer, int32_t iBufSize) {
+  ASSERT(pBuffer);
+  ASSERT(iBufSize > 0);
+
+  auto pSyntax = pdfium::MakeUnique<CFX_CSSSyntaxParser>(pBuffer, iBufSize);
+  Reset();
+  CFX_CSSSyntaxStatus eStatus;
+  do {
+    switch (eStatus = pSyntax->DoSyntaxParse()) {
+      case CFX_CSSSyntaxStatus::StyleRule:
+        eStatus = LoadStyleRule(pSyntax.get(), &m_RuleArray);
+        break;
+      default:
+        break;
+    }
+  } while (eStatus >= CFX_CSSSyntaxStatus::None);
+
+  m_StringCache.clear();
+  return eStatus != CFX_CSSSyntaxStatus::Error;
+}
+
+CFX_CSSSyntaxStatus CFX_CSSStyleSheet::LoadStyleRule(
+    CFX_CSSSyntaxParser* pSyntax,
+    std::vector<std::unique_ptr<CFX_CSSStyleRule>>* ruleArray) {
+  std::vector<std::unique_ptr<CFX_CSSSelector>> selectors;
+
+  CFX_CSSStyleRule* pStyleRule = nullptr;
+  int32_t iValueLen = 0;
+  const CFX_CSSPropertyTable* propertyTable = nullptr;
+  CFX_WideString wsName;
+  while (1) {
+    switch (pSyntax->DoSyntaxParse()) {
+      case CFX_CSSSyntaxStatus::Selector: {
+        CFX_WideStringC strValue = pSyntax->GetCurrentString();
+        auto pSelector = CFX_CSSSelector::FromString(strValue);
+        if (pSelector)
+          selectors.push_back(std::move(pSelector));
+        break;
+      }
+      case CFX_CSSSyntaxStatus::PropertyName: {
+        CFX_WideStringC strValue = pSyntax->GetCurrentString();
+        propertyTable = CFX_GetCSSPropertyByName(strValue);
+        if (!propertyTable)
+          wsName = CFX_WideString(strValue);
+        break;
+      }
+      case CFX_CSSSyntaxStatus::PropertyValue: {
+        if (propertyTable || iValueLen > 0) {
+          CFX_WideStringC strValue = pSyntax->GetCurrentString();
+          auto* decl = pStyleRule->GetDeclaration();
+          if (!strValue.IsEmpty()) {
+            if (propertyTable) {
+              decl->AddProperty(propertyTable, strValue);
+            } else {
+              decl->AddProperty(wsName, CFX_WideString(strValue));
+            }
+          }
+        }
+        break;
+      }
+      case CFX_CSSSyntaxStatus::DeclOpen: {
+        if (!pStyleRule && !selectors.empty()) {
+          auto rule = pdfium::MakeUnique<CFX_CSSStyleRule>();
+          pStyleRule = rule.get();
+          pStyleRule->SetSelector(&selectors);
+          ruleArray->push_back(std::move(rule));
+        } else {
+          SkipRuleSet(pSyntax);
+          return CFX_CSSSyntaxStatus::None;
+        }
+        break;
+      }
+      case CFX_CSSSyntaxStatus::DeclClose: {
+        if (pStyleRule && pStyleRule->GetDeclaration()->empty()) {
+          ruleArray->pop_back();
+          pStyleRule = nullptr;
+        }
+        return CFX_CSSSyntaxStatus::None;
+      }
+      case CFX_CSSSyntaxStatus::EOS:
+        return CFX_CSSSyntaxStatus::EOS;
+      case CFX_CSSSyntaxStatus::Error:
+      default:
+        return CFX_CSSSyntaxStatus::Error;
+    }
+  }
+}
+
+void CFX_CSSStyleSheet::SkipRuleSet(CFX_CSSSyntaxParser* pSyntax) {
+  while (1) {
+    switch (pSyntax->DoSyntaxParse()) {
+      case CFX_CSSSyntaxStatus::Selector:
+      case CFX_CSSSyntaxStatus::DeclOpen:
+      case CFX_CSSSyntaxStatus::PropertyName:
+      case CFX_CSSSyntaxStatus::PropertyValue:
+        break;
+      case CFX_CSSSyntaxStatus::DeclClose:
+      case CFX_CSSSyntaxStatus::EOS:
+      case CFX_CSSSyntaxStatus::Error:
+      default:
+        return;
+    }
+  }
+}