Dirty (HARD) text wrapping for ImGui::InputTexImplements

file.c

/*
* Considerations on the possible implementation of word-wrap text for ImGui :: InputTextMultiline.
*
* Implements a "hard" line wrapping depending on the length of the text.
*
* Use, copying, modification and distribution without any liability to the author is possible.
*
* The discussion leads here: https://github.com/ocornut/imgui/issues/952
*
* But it is still a problems:
* 
* - One is a "hard" breaking a line
* - Line breaks in the wrong place
* - Disregards the integrity of words
*
* Ala google translate
*/

static char buf[1024*16];
ImVec2 areaSize = ImVec2(-1, ImGui::GetWindowContentRegionMax().y - ImGui::GetCursorPosY() - 50);
float areaWidth = ImGui::CalcItemSize(areaSize, 0.0, 0.0).x;
ImGui::InputTextMultiline("##text", buf, IM_ARRAYSIZE(buf), areaSize, ImGuiInputTextFlags_CallbackAlways, CLB, &(areaWidth));


bool isAscii(char ch)
{
    if((ch > 47 && ch < 58)
            || (ch > 64 && ch < 91)
            || (ch > 97 && ch < 122))
    {
        return true;
    }
    else
    {
        return false;
    }
}

int CLB(ImGuiTextEditCallbackData* data)
{
    bool wrapped = false;
    float controlWidth = *(float*)data->UserData,
          textWidth = ImGui::CalcTextSize(data->Buf).x;

    if(controlWidth <= (textWidth + 5))
    {
        // pokud posledni znak je ascii, projit ve smycce k predchozimu znaku. a overit jestli je ascii.
        // pokud posledni znak neni ascii, zalomit.
        int i;
        bool wrap = true;

        for(i = data->BufTextLen-1; isAscii(data->Buf[i]); i--)
        {
            if(i==0)
            {
                wrap = false;
                break;
            }
        }

        if(wrap)
        {
            data->InsertChars(i, "\n");
            data->BufDirty = true;
        }
    }

    return data->BufTextLen;
}

Many many many mistakes. But I fuck it now!