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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTextRenderer.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkTextRenderer.h"
#include "vtkDebugLeaks.h" // Must be included before any singletons
#include "vtkImageData.h"
#include "vtkObjectFactory.h"
#include "vtkPath.h"
#include "vtkStdString.h"
#include "vtkTextProperty.h"
#include <vtksys/RegularExpression.hxx>
//------------------------------------------------------------------------------
// The singleton, and the singleton cleanup
VTK_ABI_NAMESPACE_BEGIN
vtkTextRenderer* vtkTextRenderer::Instance = nullptr;
vtkTextRendererCleanup vtkTextRenderer::Cleanup;
//------------------------------------------------------------------------------
vtkTextRendererCleanup::vtkTextRendererCleanup() = default;
//------------------------------------------------------------------------------
vtkTextRendererCleanup::~vtkTextRendererCleanup()
{
vtkTextRenderer::SetInstance(nullptr);
}
//------------------------------------------------------------------------------
void vtkTextRenderer::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Instance: " << vtkTextRenderer::Instance << endl;
os << indent << "MathTextRegExp: " << this->MathTextRegExp << endl;
os << indent << "MathTextRegExp2: " << this->MathTextRegExp2 << endl;
}
//------------------------------------------------------------------------------
vtkTextRenderer* vtkTextRenderer::New()
{
vtkTextRenderer* instance = vtkTextRenderer::GetInstance();
if (instance)
{
instance->Register(nullptr);
}
return instance;
}
//------------------------------------------------------------------------------
vtkTextRenderer* vtkTextRenderer::GetInstance()
{
if (vtkTextRenderer::Instance)
{
return vtkTextRenderer::Instance;
}
vtkTextRenderer::Instance =
static_cast<vtkTextRenderer*>(vtkObjectFactory::CreateInstance("vtkTextRenderer"));
return vtkTextRenderer::Instance;
}
//------------------------------------------------------------------------------
void vtkTextRenderer::SetInstance(vtkTextRenderer* instance)
{
if (vtkTextRenderer::Instance == instance)
{
return;
}
if (vtkTextRenderer::Instance)
{
vtkTextRenderer::Instance->Delete();
}
vtkTextRenderer::Instance = instance;
if (instance)
{
instance->Register(nullptr);
}
}
//------------------------------------------------------------------------------
vtkTextRenderer::vtkTextRenderer()
: MathTextRegExp(new vtksys::RegularExpression("[^\\]\\$.*[^\\]\\$"))
, MathTextRegExp2(new vtksys::RegularExpression("^\\$.*[^\\]\\$"))
, MathTextRegExpColumn(new vtksys::RegularExpression("[^\\]\\|"))
, DefaultBackend(Detect)
{
}
//------------------------------------------------------------------------------
vtkTextRenderer::~vtkTextRenderer()
{
delete this->MathTextRegExp;
delete this->MathTextRegExp2;
delete this->MathTextRegExpColumn;
}
//------------------------------------------------------------------------------
int vtkTextRenderer::DetectBackend(const vtkStdString& str)
{
if (!str.empty())
{
// the vtksys::RegularExpression class doesn't support {...|...} "or"
// branching, so we check the first character to see which regexp to use:
//
// Find unescaped "$...$" patterns where "$" is not the first character:
// MathTextRegExp = "[^\\]\\$.*[^\\]\\$"
// Find unescaped "$...$" patterns where "$" is the first character:
// MathTextRegExp2 = "^\\$.*[^\\]\\$"
// Find unescaped "|" character that defines a multicolumn line
// MathTextRegExpColumn = "[^\\]|"
if ((str[0] == '$' && this->MathTextRegExp2->find(str)) || this->MathTextRegExp->find(str) ||
this->MathTextRegExpColumn->find(str))
{
return static_cast<int>(MathText);
}
}
return static_cast<int>(FreeType);
}
//------------------------------------------------------------------------------
void vtkTextRenderer::CleanUpFreeTypeEscapes(vtkStdString& str)
{
size_t ind = str.find("\\$");
while (ind != std::string::npos)
{
str.replace(ind, 2, "$");
ind = str.find("\\$", ind + 1);
}
}
VTK_ABI_NAMESPACE_END
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