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#ifndef GLSLCOMPLETIONASSIST_H
#define GLSLCOMPLETIONASSIST_H

#include "glsleditor.h"

#include <texteditor/codeassist/completionassistprovider.h>
#include <texteditor/codeassist/iassistprocessor.h>
#include <texteditor/codeassist/defaultassistinterface.h>
#include <texteditor/codeassist/ifunctionhintproposalmodel.h>

#include <QtCore/QScopedPointer>
#include <QtGui/QIcon>

namespace GLSL {
class Function;
}

namespace TextEditor {
class BasicProposalItem;
}

namespace GLSLEditor {
namespace Internal {

class GLSLCompletionAssistInterface;

class GLSLCompletionAssistProvider : public TextEditor::CompletionAssistProvider
{
public:
    virtual bool supportsEditor(const QString &editorId) const;
    virtual TextEditor::IAssistProcessor *createProcessor() const;

    virtual int activationCharSequenceLength() const;
    virtual bool isActivationCharSequence(const QString &sequence) const;
};

class GLSLCompletionAssistProcessor : public TextEditor::IAssistProcessor
{
public:
    GLSLCompletionAssistProcessor();
    virtual ~GLSLCompletionAssistProcessor();

    virtual TextEditor::IAssistProposal *perform(const TextEditor::IAssistInterface *interface);

private:
    TextEditor::IAssistProposal *createContentProposal() const;
    TextEditor::IAssistProposal *createHintProposal(const QVector<GLSL::Function *> &symbols);
    bool acceptsIdleEditor() const;
    void addCompletion(const QString &text, const QIcon &icon, int order = 0);

    int m_startPosition;
    QScopedPointer<const GLSLCompletionAssistInterface> m_interface;
    QList<TextEditor::BasicProposalItem *> m_completions;

    QIcon m_keywordIcon;
    QIcon m_varIcon;
    QIcon m_functionIcon;
    QIcon m_typeIcon;
    QIcon m_constIcon;
    QIcon m_attributeIcon;
    QIcon m_uniformIcon;
    QIcon m_varyingIcon;
    QIcon m_otherIcon;
};

class GLSLCompletionAssistInterface : public TextEditor::DefaultAssistInterface
{
public:
    GLSLCompletionAssistInterface(QTextDocument *document,
                                  int position,
                                  Core::IFile *file,
                                  TextEditor::AssistReason reason,
                                  const QString &mimeType,
                                  const Document::Ptr &glslDoc);

    const QString &mimeType() const { return m_mimeType; }
    const Document::Ptr &glslDocument() const { return m_glslDoc; }

private:
    QString m_mimeType;
    Document::Ptr m_glslDoc;
};

} // Internal
} // GLSLEditor

#endif // GLSLCOMPLETIONASSIST_H
