JUCE/extras/Projucer/Source/LiveBuildEngine/jucer_SourceCodeRange.h

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2017 - ROLI Ltd.

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

#pragma once


//==============================================================================
struct SourceCodeRange
{
    SourceCodeRange() = default;

    SourceCodeRange (const String& f, int start, int end)
        : file (f), range (start, end)
    {
       #if JUCE_WINDOWS
        file = file.replaceCharacter ('/', '\\');
       #endif
    }

    SourceCodeRange (const String& s)
    {
        String::CharPointerType colon1 (nullptr), colon2 (nullptr);

        for (auto p = s.getCharPointer(); ! p.isEmpty(); ++p)
        {
            if (*p == ':')
            {
                colon1 = colon2;
                colon2 = p;
            }
        }

        if (colon1.getAddress() != nullptr && colon2.getAddress() != nullptr)
        {
            file = String (s.getCharPointer(), colon1);
            range = Range<int> ((colon1 + 1).getIntValue32(),
                                (colon2 + 1).getIntValue32());
        }
    }

    String file;
    Range<int> range;

    bool isValid() const noexcept   { return file.isNotEmpty() && range != Range<int>(); }

    void nudge (const String& changedFile, const int insertPoint, const int delta) noexcept
    {
        if (range.getEnd() >= insertPoint && file == changedFile)
        {
            const int newEnd = range.getEnd() + delta;
            int newStart = range.getStart();
            if (newStart > insertPoint)
                newStart += delta;

            range = Range<int> (newStart, newEnd);
        }
    }

    void fileContentChanged (const String& changedFile) noexcept
    {
        if (file == changedFile)
            range = Range<int>();
    }

    String toString() const
    {
        if (file.isEmpty() && range.isEmpty())
            return String();

        return file + ":" + String (range.getStart()) + ":" + String (range.getEnd());
    }

    void writeToValueTree (ValueTree& v, const Identifier& prop) const
    {
        const String s (toString());

        if (s.isNotEmpty())
            v.setProperty (prop, s, nullptr);
    }

    bool operator== (const SourceCodeRange& other) const noexcept    { return range == other.range && file == other.file; }
    bool operator!= (const SourceCodeRange& other) const noexcept    { return ! operator== (other); }
};