Наследование: System.Attribute
Пример #1
0
        void Populate(object callbacks, object o, RootElement root)
        {
            MemberInfo last_radio_index = null;
            var        members          = o.GetType().GetMembers(BindingFlags.DeclaredOnly | BindingFlags.Public |
                                                                 BindingFlags.NonPublic | BindingFlags.Instance);

            Section section = null;

            foreach (var mi in members)
            {
                Type mType = GetTypeForMember(mi);

                if (mType == null)
                {
                    continue;
                }

                string    caption = null;
                object [] attrs   = mi.GetCustomAttributes(false);
                bool      skip    = false;
                foreach (var attr in attrs)
                {
                    if (attr is SkipAttribute || attr is System.Runtime.CompilerServices.CompilerGeneratedAttribute)
                    {
                        skip = true;
                    }
                    else if (attr is CaptionAttribute)
                    {
                        caption = ((CaptionAttribute)attr).Caption;
                    }
                    else if (attr is SectionAttribute)
                    {
                        if (section != null)
                        {
                            root.Add(section);
                        }
                        var sa = attr as SectionAttribute;
                        section = new Section(sa.Caption, sa.Footer);
                    }
                }
                if (skip)
                {
                    continue;
                }

                if (caption == null)
                {
                    caption = MakeCaption(mi.Name);
                }

                if (section == null)
                {
                    section = new Section();
                }

                Element element = null;
                if (mType == typeof(string))
                {
                    PasswordAttribute  pa     = null;
                    AlignmentAttribute align  = null;
                    EntryAttribute     ea     = null;
                    object             html   = null;
                    Action             invoke = null;
                    bool multi = false;

                    foreach (object attr in attrs)
                    {
                        if (attr is PasswordAttribute)
                        {
                            pa = attr as PasswordAttribute;
                        }
                        else if (attr is EntryAttribute)
                        {
                            ea = attr as EntryAttribute;
                        }
                        else if (attr is MultilineAttribute)
                        {
                            multi = true;
                        }
                        else if (attr is HtmlAttribute)
                        {
                            html = attr;
                        }
                        else if (attr is AlignmentAttribute)
                        {
                            align = attr as AlignmentAttribute;
                        }

                        if (attr is OnTapAttribute)
                        {
                            string mname = ((OnTapAttribute)attr).Method;

                            if (callbacks == null)
                            {
                                throw new Exception("Your class contains [OnTap] attributes, but you passed a null object for `context' in the constructor");
                            }

                            var method = callbacks.GetType().GetMethod(mname);
                            if (method == null)
                            {
                                throw new Exception("Did not find method " + mname);
                            }
                            invoke = delegate {
                                method.Invoke(method.IsStatic ? null : callbacks, new object [0]);
                            };
                        }
                    }

                    string value = (string)GetValue(mi, o);
                    if (pa != null)
                    {
                        element = new EntryElement(caption, pa.Placeholder, value, true);
                    }
                    else if (ea != null)
                    {
                        element = new EntryElement(caption, ea.Placeholder, value)
                        {
                            KeyboardType = ea.KeyboardType, AutocapitalizationType = ea.AutocapitalizationType, AutocorrectionType = ea.AutocorrectionType, ClearButtonMode = ea.ClearButtonMode
                        }
                    }
                    ;
                    else if (multi)
                    {
                        element = new MultilineElement(caption, value);
                    }
                    else if (html != null)
                    {
                        element = new HtmlElement(caption, value);
                    }
                    else
                    {
                        var selement = new StringElement(caption, value);
                        element = selement;

                        if (align != null)
                        {
                            selement.Alignment = align.Alignment;
                        }
                    }

                    if (invoke != null)
                    {
                        ((StringElement)element).Tapped += invoke;
                    }
                }
                else if (mType == typeof(float))
                {
                    var floatElement = new FloatElement(null, null, (float)GetValue(mi, o));
                    floatElement.Caption = caption;
                    element = floatElement;

                    foreach (object attr in attrs)
                    {
                        if (attr is RangeAttribute)
                        {
                            var ra = attr as RangeAttribute;
                            floatElement.MinValue    = ra.Low;
                            floatElement.MaxValue    = ra.High;
                            floatElement.ShowCaption = ra.ShowCaption;
                        }
                    }
                }
                else if (mType == typeof(bool))
                {
                    bool checkbox = false;
                    foreach (object attr in attrs)
                    {
                        if (attr is CheckboxAttribute)
                        {
                            checkbox = true;
                        }
                    }

                    if (checkbox)
                    {
                        element = new CheckboxElement(caption, (bool)GetValue(mi, o));
                    }
                    else
                    {
                        element = new BooleanElement(caption, (bool)GetValue(mi, o));
                    }
                }
                else if (mType == typeof(DateTime))
                {
                    var  dateTime = (DateTime)GetValue(mi, o);
                    bool asDate = false, asTime = false;

                    foreach (object attr in attrs)
                    {
                        if (attr is DateAttribute)
                        {
                            asDate = true;
                        }
                        else if (attr is TimeAttribute)
                        {
                            asTime = true;
                        }
                    }

                    if (asDate)
                    {
                        element = new DateElement(caption, dateTime);
                    }
                    else if (asTime)
                    {
                        element = new TimeElement(caption, dateTime);
                    }
                    else
                    {
                        element = new DateTimeElement(caption, dateTime);
                    }
                }
                else if (mType.IsEnum)
                {
                    var   csection = new Section();
                    ulong evalue   = Convert.ToUInt64(GetValue(mi, o), null);
                    int   idx      = 0;
                    int   selected = 0;

                    foreach (var fi in mType.GetFields(BindingFlags.Public | BindingFlags.Static))
                    {
                        ulong v = Convert.ToUInt64(GetValue(fi, null));

                        if (v == evalue)
                        {
                            selected = idx;
                        }

                        CaptionAttribute ca = Attribute.GetCustomAttribute(fi, typeof(CaptionAttribute)) as CaptionAttribute;
                        csection.Add(new RadioElement(ca != null ? ca.Caption : MakeCaption(fi.Name)));
                        idx++;
                    }

                    element = new RootElement(caption, new RadioGroup(null, selected))
                    {
                        csection
                    };
                }
                else if (mType == typeof(UIImage))
                {
                    element = new ImageElement((UIImage)GetValue(mi, o));
                }
                else if (typeof(System.Collections.IEnumerable).IsAssignableFrom(mType))
                {
                    var csection = new Section();
                    int count    = 0;

                    if (last_radio_index == null)
                    {
                        throw new Exception("IEnumerable found, but no previous int found");
                    }
                    foreach (var e in (IEnumerable)GetValue(mi, o))
                    {
                        csection.Add(new RadioElement(e.ToString()));
                        count++;
                    }
                    int selected = (int)GetValue(last_radio_index, o);
                    if (selected >= count || selected < 0)
                    {
                        selected = 0;
                    }
                    element = new RootElement(caption, new MemberRadioGroup(null, selected, last_radio_index))
                    {
                        csection
                    };
                    last_radio_index = null;
                }
                else if (typeof(int) == mType)
                {
                    foreach (object attr in attrs)
                    {
                        if (attr is RadioSelectionAttribute)
                        {
                            last_radio_index = mi;
                            break;
                        }
                    }
                }
                else
                {
                    var nested = GetValue(mi, o);
                    if (nested != null)
                    {
                        var newRoot = new RootElement(caption);
                        Populate(callbacks, nested, newRoot);
                        element = newRoot;
                    }
                }

                if (element == null)
                {
                    continue;
                }
                section.Add(element);
                mappings [element] = new MemberAndInstance(mi, o);
            }
            root.Add(section);
        }