mirror of
https://github.com/Ellpeck/MLEM.git
synced 2024-04-30 07:53:24 +02:00
Added TextInput class, which is an isolated version of MLEM.Ui's TextField logic
This commit is contained in:
parent
282a398f3b
commit
aff61508c4
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@ -17,6 +17,7 @@ Additions
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- Added ReverseInput, ReverseOutput and AndThen to Easings
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- Added an Enum constructor to GenericInput
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- Added RandomPitchModifier and GetRandomPitch to SoundEffectInfo
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- Added TextInput class, which is an isolated version of MLEM.Ui's TextField logic
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Improvements
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- Allow comparing Keybind and Combination based on the amount of modifiers they have
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@ -356,4 +357,4 @@ Additions
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Fixes
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- Fixed some number parsing not using the invariant culture
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- Fixed RawContentManager crashing with dynamic assemblies present
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- Fixed RawContentManager crashing with dynamic assemblies present
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@ -1,11 +1,5 @@
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using System;
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using System.IO;
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using System.Linq;
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using System.Text;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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using Microsoft.Xna.Framework.Input;
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using MLEM.Extensions;
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using MLEM.Font;
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using MLEM.Graphics;
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using MLEM.Input;
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@ -19,57 +13,22 @@ namespace MLEM.Ui.Elements {
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/// A text field element for use inside of a <see cref="UiSystem"/>.
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/// A text field is a selectable element that can be typed in, as well as copied and pasted from.
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/// If an on-screen keyboard is required, then this text field will automatically open an on-screen keyboard using <see cref="MlemPlatform.OpenOnScreenKeyboard"/>.
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/// This class interally uses MLEM's <see cref="TextInput"/>.
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/// </summary>
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public class TextField : Element {
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/// <summary>
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/// A <see cref="Rule"/> that allows any visible character and spaces
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/// </summary>
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public static readonly Rule DefaultRule = (field, add) => {
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foreach (var c in add) {
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if (char.IsControl(c) && (!field.Multiline || c != '\n'))
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return false;
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}
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return true;
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};
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/// <summary>
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/// A <see cref="Rule"/> that only allows letters
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/// </summary>
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public static readonly Rule OnlyLetters = (field, add) => {
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foreach (var c in add) {
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if (!char.IsLetter(c))
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return false;
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}
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return true;
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};
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/// <summary>
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/// A <see cref="Rule"/> that only allows numerals
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/// </summary>
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public static readonly Rule OnlyNumbers = (field, add) => {
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foreach (var c in add) {
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if (!char.IsNumber(c))
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return false;
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}
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return true;
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};
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/// <summary>
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/// A <see cref="Rule"/> that only allows letters and numerals
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/// </summary>
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public static readonly Rule LettersNumbers = (field, add) => {
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foreach (var c in add) {
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if (!char.IsLetter(c) || !char.IsNumber(c))
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return false;
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}
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return true;
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};
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/// <summary>
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/// A <see cref="Rule"/> that only allows characters not contained in <see cref="Path.GetInvalidPathChars"/>
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/// </summary>
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public static readonly Rule PathNames = (field, add) => add.IndexOfAny(Path.GetInvalidPathChars()) < 0;
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/// <summary>
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/// A <see cref="Rule"/> that only allows characters not contained in <see cref="Path.GetInvalidFileNameChars"/>
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/// </summary>
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public static readonly Rule FileNames = (field, add) => add.IndexOfAny(Path.GetInvalidFileNameChars()) < 0;
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/// <inheritdoc cref="TextInput.DefaultRule"/>
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public static readonly Rule DefaultRule = (field, add) => TextInput.DefaultRule(field.textInput, add);
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/// <inheritdoc cref="TextInput.OnlyLetters"/>
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public static readonly Rule OnlyLetters = (field, add) => TextInput.OnlyLetters(field.textInput, add);
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/// <inheritdoc cref="TextInput.OnlyNumbers"/>
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public static readonly Rule OnlyNumbers = (field, add) => TextInput.OnlyNumbers(field.textInput, add);
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/// <inheritdoc cref="TextInput.LettersNumbers"/>
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public static readonly Rule LettersNumbers = (field, add) => TextInput.LettersNumbers(field.textInput, add);
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/// <inheritdoc cref="TextInput.PathNames"/>
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public static readonly Rule PathNames = (field, add) => TextInput.PathNames(field.textInput, add);
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/// <inheritdoc cref="TextInput.FileNames"/>
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public static readonly Rule FileNames = (field, add) => TextInput.FileNames(field.textInput, add);
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/// <summary>
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/// The color that this text field's text should display with
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@ -94,23 +53,23 @@ namespace MLEM.Ui.Elements {
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/// <summary>
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/// The scale that this text field should render text with
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/// </summary>
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public StyleProp<float> TextScale;
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public StyleProp<float> TextScale {
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get => this.textScale;
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set {
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this.textScale = value;
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this.textInput.TextScale = value;
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}
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}
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/// <summary>
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/// The font that this text field should display text with
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/// </summary>
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public StyleProp<GenericFont> Font;
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/// <summary>
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/// This text field's current text
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/// </summary>
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public string Text => this.text.ToString();
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/// <summary>
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/// The text that displays in this text field if <see cref="Text"/> is empty
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/// </summary>
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public string PlaceholderText;
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/// <summary>
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/// An event that gets called when <see cref="Text"/> changes, either through input, or through a manual change.
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/// </summary>
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public TextChanged OnTextChange;
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public StyleProp<GenericFont> Font {
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get => this.font;
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set {
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this.font = value;
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this.textInput.Font = value;
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}
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}
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/// <summary>
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/// The x position that text should start rendering at, based on the x position of this text field.
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/// </summary>
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@ -119,11 +78,42 @@ namespace MLEM.Ui.Elements {
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/// The width that the caret should render with, in pixels
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/// </summary>
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public StyleProp<float> CaretWidth;
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/// <summary>
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/// The rule used for text input.
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/// Rules allow only certain characters to be allowed inside of a text field.
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/// </summary>
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/// <inheritdoc cref="TextInput.Text"/>
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public string Text => this.textInput.Text;
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/// <inheritdoc cref="TextInput.OnTextChange"/>
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public TextChanged OnTextChange;
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/// <inheritdoc cref="TextInput.InputRule"/>
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public Rule InputRule;
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/// <inheritdoc cref="TextInput.CaretPos"/>
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public int CaretPos {
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get => this.textInput.CaretPos;
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set => this.textInput.CaretPos = value;
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}
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/// <inheritdoc cref="TextInput.CaretLine"/>
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public int CaretLine => this.textInput.CaretLine;
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/// <inheritdoc cref="TextInput.CaretPosInLine"/>
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public int CaretPosInLine => this.textInput.CaretPosInLine;
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/// <inheritdoc cref="TextInput.MaskingCharacter"/>
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public char? MaskingCharacter {
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get => this.textInput.MaskingCharacter;
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set => this.textInput.MaskingCharacter = value;
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}
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/// <inheritdoc cref="TextInput.MaximumCharacters"/>
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public int? MaximumCharacters {
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get => this.textInput.MaximumCharacters;
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set => this.textInput.MaximumCharacters = value;
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}
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/// <inheritdoc cref="TextInput.Multiline"/>
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public bool Multiline {
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get => this.textInput.Multiline;
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set => this.textInput.Multiline = value;
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}
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/// <summary>
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/// The text that displays in this text field if <see cref="Text"/> is empty
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/// </summary>
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public string PlaceholderText;
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/// <summary>
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/// The title of the <c>KeyboardInput</c> field on mobile devices and consoles
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/// </summary>
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@ -132,72 +122,10 @@ namespace MLEM.Ui.Elements {
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/// The description of the <c>KeyboardInput</c> field on mobile devices and consoles
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/// </summary>
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public string MobileDescription;
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/// <summary>
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/// The position of the caret within the text.
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/// This is always between 0 and the <see cref="string.Length"/> of <see cref="Text"/>
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/// </summary>
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public int CaretPos {
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get => this.caretPos;
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set {
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var val = MathHelper.Clamp(value, 0, this.text.Length);
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if (this.caretPos != val) {
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this.caretPos = val;
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this.caretBlinkTimer = 0;
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this.HandleTextChange(false);
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}
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}
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}
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/// <summary>
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/// The line of text that the caret is currently on.
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/// This can only be only non-0 if <see cref="Multiline"/> is true.
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/// </summary>
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public int CaretLine { get; private set; }
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/// <summary>
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/// The position in the current <see cref="CaretLine"/> that the caret is currently on.
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/// If <see cref="Multiline"/> is false, this value is always equal to <see cref="CaretPos"/>.
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/// </summary>
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public int CaretPosInLine { get; private set; }
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/// <summary>
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/// A character that should be displayed instead of this text field's <see cref="Text"/> content.
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/// The amount of masking characters displayed will be equal to the <see cref="Text"/>'s length.
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/// This behavior is useful for password fields or similar.
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/// </summary>
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public char? MaskingCharacter {
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get => this.maskingCharacter;
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set {
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this.maskingCharacter = value;
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this.HandleTextChange(false);
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}
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}
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/// <summary>
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/// The maximum amount of characters that can be input into this text field.
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/// If this is set, the length of <see cref="Text"/> will never exceed this value.
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/// </summary>
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public int? MaximumCharacters;
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/// <summary>
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/// Whether this text field should support multi-line editing.
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/// If this is true, pressing <see cref="Keys.Enter"/> will insert a new line into the <see cref="Text"/> if the <see cref="InputRule"/> allows it.
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/// Additionally, text will be rendered with horizontal soft wraps, and lines that are outside of the text field's bounds will be hidden.
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/// </summary>
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public bool Multiline {
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get => this.multiline;
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set {
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this.multiline = value;
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this.HandleTextChange(false);
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}
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}
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private readonly StringBuilder text = new StringBuilder();
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private char? maskingCharacter;
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private double caretBlinkTimer;
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private string displayedText;
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private string[] splitText;
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private int textOffset;
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private int lineOffset;
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private int caretPos;
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private float caretDrawOffset;
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private bool multiline;
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private readonly TextInput textInput;
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private StyleProp<GenericFont> font;
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private StyleProp<float> textScale;
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/// <summary>
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/// Creates a new text field with the given settings
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@ -209,6 +137,11 @@ namespace MLEM.Ui.Elements {
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/// <param name="text">The text that the text field should contain by default</param>
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/// <param name="multiline">Whether the text field should support multi-line editing</param>
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public TextField(Anchor anchor, Vector2 size, Rule rule = null, GenericFont font = null, string text = null, bool multiline = false) : base(anchor, size) {
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this.textInput = new TextInput(null, Vector2.Zero, 1, null, ClipboardService.SetText, ClipboardService.GetText) {
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OnTextChange = (i, s) => this.OnTextChange?.Invoke(this, s),
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InputRule = (i, s) => this.InputRule.Invoke(this, s)
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};
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this.InputRule = rule ?? TextField.DefaultRule;
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this.Multiline = multiline;
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if (font != null)
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@ -218,73 +151,32 @@ namespace MLEM.Ui.Elements {
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MlemPlatform.EnsureExists();
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this.OnPressed += OnPressed;
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this.OnTextInput += (element, key, character) => {
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if (!this.IsSelected || this.IsHidden)
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return;
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if (key == Keys.Back) {
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if (this.CaretPos > 0) {
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this.CaretPos--;
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this.RemoveText(this.CaretPos, 1);
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}
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} else if (key == Keys.Delete) {
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this.RemoveText(this.CaretPos, 1);
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} else if (this.Multiline && key == Keys.Enter) {
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this.InsertText('\n');
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} else {
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this.InsertText(character);
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}
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};
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this.OnDeselected += e => this.CaretPos = 0;
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this.OnSelected += e => this.CaretPos = this.text.Length;
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async void OnPressed(Element e) {
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this.OnPressed += async e => {
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var title = this.MobileTitle ?? this.PlaceholderText;
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var result = await MlemPlatform.Current.OpenOnScreenKeyboard(title, this.MobileDescription, this.Text, false);
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if (result != null)
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this.SetText(this.Multiline ? result : result.Replace('\n', ' '), true);
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}
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};
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this.OnTextInput += (element, key, character) => {
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if (this.IsSelected && !this.IsHidden)
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this.textInput.OnTextInput(key, character);
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};
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this.OnDeselected += e => this.CaretPos = 0;
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this.OnSelected += e => this.CaretPos = this.textInput.Length;
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}
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/// <inheritdoc />
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public override void SetAreaAndUpdateChildren(RectangleF area) {
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base.SetAreaAndUpdateChildren(area);
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this.textInput.Size = this.DisplayArea.Size / this.Scale - new Vector2(2 * this.TextOffsetX);
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this.textInput.TextScale = this.TextScale;
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}
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/// <inheritdoc />
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public override void Update(GameTime time) {
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base.Update(time);
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// handle first initialization if not done
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if (this.displayedText == null)
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this.HandleTextChange(false);
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if (!this.IsSelected || this.IsHidden)
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return;
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if (this.CaretPos > 0 && this.Input.TryConsumePressed(Keys.Left)) {
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this.CaretPos--;
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} else if (this.CaretPos < this.text.Length && this.Input.TryConsumePressed(Keys.Right)) {
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this.CaretPos++;
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} else if (this.Multiline && this.Input.IsKeyPressedAvailable(Keys.Up) && this.MoveCaretToLine(this.CaretLine - 1)) {
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this.Input.TryConsumeKeyPressed(Keys.Up);
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} else if (this.Multiline && this.Input.IsKeyPressedAvailable(Keys.Down) && this.MoveCaretToLine(this.CaretLine + 1)) {
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this.Input.TryConsumeKeyPressed(Keys.Down);
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} else if (this.CaretPos != 0 && this.Input.TryConsumeKeyPressed(Keys.Home)) {
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this.CaretPos = 0;
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} else if (this.CaretPos != this.text.Length && this.Input.TryConsumeKeyPressed(Keys.End)) {
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this.CaretPos = this.text.Length;
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} else if (this.Input.IsModifierKeyDown(ModifierKey.Control)) {
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if (this.Input.IsKeyPressedAvailable(Keys.V)) {
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var clip = ClipboardService.GetText();
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if (clip != null) {
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this.InsertText(clip, true);
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this.Input.TryConsumeKeyPressed(Keys.V);
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}
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} else if (this.Input.TryConsumeKeyPressed(Keys.C)) {
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// until there is text selection, just copy the whole content
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ClipboardService.SetText(this.Text);
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}
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}
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this.caretBlinkTimer += time.ElapsedGameTime.TotalSeconds;
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if (this.caretBlinkTimer >= 1)
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this.caretBlinkTimer = 0;
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if (this.IsSelected && !this.IsHidden)
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this.textInput.Update(time, this.Input);
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}
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/// <inheritdoc />
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@ -297,101 +189,31 @@ namespace MLEM.Ui.Elements {
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}
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batch.Draw(tex, this.DisplayArea, color, this.Scale);
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if (this.displayedText != null) {
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var lineHeight = this.Font.Value.LineHeight * this.TextScale * this.Scale;
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var offset = new Vector2(
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this.TextOffsetX * this.Scale,
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this.Multiline ? this.TextOffsetX * this.Scale : this.DisplayArea.Height / 2 - lineHeight / 2);
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var textPos = this.DisplayArea.Location + offset;
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if (this.text.Length > 0 || this.IsSelected) {
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var textColor = this.TextColor.OrDefault(Color.White);
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this.Font.Value.DrawString(batch, this.displayedText, textPos, textColor * alpha, 0, Vector2.Zero, this.TextScale * this.Scale, SpriteEffects.None, 0);
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if (this.IsSelected && this.caretBlinkTimer < 0.5F) {
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var caretDrawPos = textPos + new Vector2(this.caretDrawOffset * this.TextScale * this.Scale, 0);
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if (this.Multiline)
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caretDrawPos.Y += this.Font.Value.LineHeight * (this.CaretLine - this.lineOffset) * this.TextScale * this.Scale;
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batch.Draw(batch.GetBlankTexture(), new RectangleF(caretDrawPos, new Vector2(this.CaretWidth * this.Scale, lineHeight)), null, textColor * alpha);
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}
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} else if (this.PlaceholderText != null) {
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this.Font.Value.DrawString(batch, this.PlaceholderText, textPos, this.PlaceholderColor.OrDefault(Color.Gray) * alpha, 0, Vector2.Zero, this.TextScale * this.Scale, SpriteEffects.None, 0);
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}
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var lineHeight = this.Font.Value.LineHeight * this.TextScale * this.Scale;
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var textPos = this.DisplayArea.Location + new Vector2(
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this.TextOffsetX * this.Scale,
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this.Multiline ? this.TextOffsetX * this.Scale : this.DisplayArea.Height / 2 - lineHeight / 2);
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if (this.textInput.Length > 0 || this.IsSelected) {
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this.textInput.Draw(batch, textPos, this.Scale, this.IsSelected ? this.CaretWidth : 0, this.TextColor.OrDefault(Color.White) * alpha);
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} else if (this.PlaceholderText != null) {
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this.Font.Value.DrawString(batch, this.PlaceholderText, textPos, this.PlaceholderColor.OrDefault(Color.Gray) * alpha, 0, Vector2.Zero, this.TextScale * this.Scale, SpriteEffects.None, 0);
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}
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base.Draw(time, batch, alpha, context);
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}
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/// <summary>
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/// Replaces this text field's text with the given text.
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/// If the resulting <see cref="Text"/> exceeds <see cref="MaximumCharacters"/>, the end will be cropped to fit.
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/// </summary>
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/// <param name="text">The new text</param>
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/// <param name="removeMismatching">If any characters that don't match the <see cref="InputRule"/> should be left out</param>
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/// <inheritdoc cref="TextInput.SetText"/>
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public void SetText(object text, bool removeMismatching = false) {
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var strg = text?.ToString() ?? string.Empty;
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if (!this.FilterText(ref strg, removeMismatching))
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return;
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if (this.MaximumCharacters != null && strg.Length > this.MaximumCharacters)
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strg = strg.Substring(0, this.MaximumCharacters.Value);
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this.text.Clear();
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||||
this.text.Append(strg);
|
||||
this.CaretPos = this.text.Length;
|
||||
this.HandleTextChange();
|
||||
this.textInput.SetText(text, removeMismatching);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Inserts the given text at the <see cref="CaretPos"/>.
|
||||
/// If the resulting <see cref="Text"/> exceeds <see cref="MaximumCharacters"/>, the end will be cropped to fit.
|
||||
/// </summary>
|
||||
/// <param name="text">The text to insert</param>
|
||||
/// <param name="removeMismatching">If any characters that don't match the <see cref="InputRule"/> should be left out</param>
|
||||
/// <inheritdoc cref="TextInput.InsertText"/>
|
||||
public void InsertText(object text, bool removeMismatching = false) {
|
||||
var strg = text?.ToString() ?? string.Empty;
|
||||
if (!this.FilterText(ref strg, removeMismatching))
|
||||
return;
|
||||
if (this.MaximumCharacters != null && this.text.Length + strg.Length > this.MaximumCharacters)
|
||||
strg = strg.Substring(0, this.MaximumCharacters.Value - this.text.Length);
|
||||
this.text.Insert(this.CaretPos, strg);
|
||||
this.CaretPos += strg.Length;
|
||||
this.HandleTextChange();
|
||||
this.textInput.InsertText(text, removeMismatching);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Removes the given amount of text at the given index
|
||||
/// </summary>
|
||||
/// <param name="index">The index</param>
|
||||
/// <param name="length">The amount of text to remove</param>
|
||||
/// <inheritdoc cref="TextInput.RemoveText"/>
|
||||
public void RemoveText(int index, int length) {
|
||||
if (index < 0 || index >= this.text.Length)
|
||||
return;
|
||||
this.text.Remove(index, length);
|
||||
// ensure that caret pos is still in bounds
|
||||
this.CaretPos = this.CaretPos;
|
||||
this.HandleTextChange();
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Moves the <see cref="CaretPos"/> to the given line, if it exists.
|
||||
/// Additionally maintains the <see cref="CaretPosInLine"/> roughly based on the visual distance that the caret has from the left border of the current <see cref="CaretLine"/>.
|
||||
/// </summary>
|
||||
/// <param name="line">The line to move the caret to</param>
|
||||
/// <returns>True if the caret was moved, false if it was not (which indicates that the line with the given <paramref name="line"/> index does not exist)</returns>
|
||||
public bool MoveCaretToLine(int line) {
|
||||
var (destStart, destEnd) = this.GetLineBounds(line);
|
||||
if (destEnd > 0) {
|
||||
// find the position whose distance from the start is closest to the current distance from the start
|
||||
var destAccum = "";
|
||||
while (destAccum.Length < destEnd - destStart) {
|
||||
if (this.Font.Value.MeasureString(destAccum).X >= this.caretDrawOffset) {
|
||||
this.CaretPos = destStart + destAccum.Length;
|
||||
return true;
|
||||
}
|
||||
destAccum += this.text[destStart + destAccum.Length];
|
||||
}
|
||||
// if we don't find a proper position, just move to the end of the destination line
|
||||
this.CaretPos = destEnd;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
this.textInput.RemoveText(index, length);
|
||||
}
|
||||
|
||||
/// <inheritdoc />
|
||||
|
|
@ -406,154 +228,6 @@ namespace MLEM.Ui.Elements {
|
|||
this.CaretWidth = this.CaretWidth.OrStyle(style.TextFieldCaretWidth);
|
||||
}
|
||||
|
||||
private bool FilterText(ref string text, bool removeMismatching) {
|
||||
if (removeMismatching) {
|
||||
var result = new StringBuilder();
|
||||
foreach (var c in text) {
|
||||
if (this.InputRule(this, c.ToCachedString()))
|
||||
result.Append(c);
|
||||
}
|
||||
text = result.ToString();
|
||||
} else if (!this.InputRule(this, text))
|
||||
return false;
|
||||
return true;
|
||||
}
|
||||
|
||||
private void HandleTextChange(bool textChanged = true) {
|
||||
// not initialized yet
|
||||
if (!this.Font.HasValue())
|
||||
return;
|
||||
var maxWidth = this.DisplayArea.Width / this.Scale - this.TextOffsetX * 2;
|
||||
if (this.Multiline) {
|
||||
// soft wrap if we're multiline
|
||||
this.splitText = this.Font.Value.SplitStringSeparate(this.text, maxWidth, this.TextScale).ToArray();
|
||||
this.displayedText = string.Join("\n", this.splitText);
|
||||
this.UpdateCaretData();
|
||||
|
||||
var maxHeight = this.DisplayArea.Height / this.Scale - this.TextOffsetX * 2;
|
||||
if (this.Font.Value.MeasureString(this.displayedText).Y * this.TextScale > maxHeight) {
|
||||
var maxLines = (maxHeight / (this.Font.Value.LineHeight * this.TextScale)).Floor();
|
||||
if (this.lineOffset > this.CaretLine) {
|
||||
// if we're moving up
|
||||
this.lineOffset = this.CaretLine;
|
||||
} else if (this.CaretLine >= maxLines) {
|
||||
// if we're moving down
|
||||
var limit = this.CaretLine - (maxLines - 1);
|
||||
if (limit > this.lineOffset)
|
||||
this.lineOffset = limit;
|
||||
}
|
||||
// calculate resulting string
|
||||
var ret = new StringBuilder();
|
||||
var lines = 0;
|
||||
var originalIndex = 0;
|
||||
for (var i = 0; i < this.displayedText.Length; i++) {
|
||||
if (lines >= this.lineOffset) {
|
||||
if (ret.Length <= 0)
|
||||
this.textOffset = originalIndex;
|
||||
ret.Append(this.displayedText[i]);
|
||||
}
|
||||
if (this.displayedText[i] == '\n') {
|
||||
lines++;
|
||||
if (this.text[originalIndex] == '\n')
|
||||
originalIndex++;
|
||||
} else {
|
||||
originalIndex++;
|
||||
}
|
||||
if (lines - this.lineOffset >= maxLines)
|
||||
break;
|
||||
}
|
||||
this.displayedText = ret.ToString();
|
||||
} else {
|
||||
this.lineOffset = 0;
|
||||
this.textOffset = 0;
|
||||
}
|
||||
} else {
|
||||
// not multiline, so scroll horizontally based on caret position
|
||||
if (this.Font.Value.MeasureString(this.text).X * this.TextScale > maxWidth) {
|
||||
if (this.textOffset > this.CaretPos) {
|
||||
// if we're moving the caret to the left
|
||||
this.textOffset = this.CaretPos;
|
||||
} else {
|
||||
// if we're moving the caret to the right
|
||||
var importantArea = this.text.ToString(this.textOffset, Math.Min(this.CaretPos, this.text.Length) - this.textOffset);
|
||||
var bound = this.CaretPos - this.Font.Value.TruncateString(importantArea, maxWidth, this.TextScale, true).Length;
|
||||
if (this.textOffset < bound)
|
||||
this.textOffset = bound;
|
||||
}
|
||||
var visible = this.text.ToString(this.textOffset, this.text.Length - this.textOffset);
|
||||
this.displayedText = this.Font.Value.TruncateString(visible, maxWidth, this.TextScale);
|
||||
} else {
|
||||
this.displayedText = this.Text;
|
||||
this.textOffset = 0;
|
||||
}
|
||||
this.UpdateCaretData();
|
||||
}
|
||||
|
||||
if (this.MaskingCharacter != null)
|
||||
this.displayedText = new string(this.MaskingCharacter.Value, this.displayedText.Length);
|
||||
|
||||
if (textChanged)
|
||||
this.OnTextChange?.Invoke(this, this.Text);
|
||||
}
|
||||
|
||||
private void UpdateCaretData() {
|
||||
if (this.splitText != null) {
|
||||
var line = 0;
|
||||
var index = 0;
|
||||
for (var d = 0; d < this.splitText.Length; d++) {
|
||||
var startOfLine = 0;
|
||||
var split = this.splitText[d];
|
||||
for (var i = 0; i <= split.Length; i++) {
|
||||
if (index == this.CaretPos) {
|
||||
this.CaretLine = line;
|
||||
this.CaretPosInLine = i - startOfLine;
|
||||
this.caretDrawOffset = this.Font.Value.MeasureString(split.Substring(startOfLine, this.CaretPosInLine)).X;
|
||||
return;
|
||||
}
|
||||
if (i < split.Length) {
|
||||
// manual splits
|
||||
if (split[i] == '\n') {
|
||||
startOfLine = i + 1;
|
||||
line++;
|
||||
}
|
||||
index++;
|
||||
}
|
||||
}
|
||||
// max width splits
|
||||
line++;
|
||||
}
|
||||
} else if (this.displayedText != null) {
|
||||
this.CaretLine = 0;
|
||||
this.CaretPosInLine = this.CaretPos;
|
||||
this.caretDrawOffset = this.Font.Value.MeasureString(this.displayedText.Substring(0, this.CaretPos - this.textOffset)).X;
|
||||
}
|
||||
}
|
||||
|
||||
private (int, int) GetLineBounds(int boundLine) {
|
||||
if (this.splitText != null) {
|
||||
var line = 0;
|
||||
var index = 0;
|
||||
var startOfLineIndex = 0;
|
||||
for (var d = 0; d < this.splitText.Length; d++) {
|
||||
var split = this.splitText[d];
|
||||
for (var i = 0; i < split.Length; i++) {
|
||||
index++;
|
||||
if (split[i] == '\n') {
|
||||
if (boundLine == line)
|
||||
return (startOfLineIndex, index - 1);
|
||||
line++;
|
||||
startOfLineIndex = index;
|
||||
}
|
||||
}
|
||||
if (boundLine == line)
|
||||
return (startOfLineIndex, index - 1);
|
||||
line++;
|
||||
startOfLineIndex = index;
|
||||
}
|
||||
}
|
||||
return default;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// A delegate method used for <see cref="TextField.OnTextChange"/>
|
||||
/// </summary>
|
||||
|
|
|
|||
548
MLEM/Input/TextInput.cs
Normal file
548
MLEM/Input/TextInput.cs
Normal file
|
|
@ -0,0 +1,548 @@
|
|||
using System;
|
||||
using System.IO;
|
||||
using System.Linq;
|
||||
using System.Text;
|
||||
using Microsoft.Xna.Framework;
|
||||
using Microsoft.Xna.Framework.Graphics;
|
||||
using Microsoft.Xna.Framework.Input;
|
||||
using MLEM.Extensions;
|
||||
using MLEM.Font;
|
||||
using MLEM.Misc;
|
||||
|
||||
namespace MLEM.Input {
|
||||
/// <summary>
|
||||
/// A class that contains all of the necessary tools to create a text input field or box.
|
||||
/// This text input features single- and <see cref="Multiline"/> input, <see cref="InputRule"/> sets, free caret movement, copying and pasting, and more.
|
||||
/// To use this class, <see cref="OnTextInput"/>, <see cref="Update"/> and <see cref="Draw"/> have to be called regularly.
|
||||
/// While this class is used by MLEM.Ui's TextField, it is designed to be used for custom or external UI systems.
|
||||
/// </summary>
|
||||
public class TextInput {
|
||||
|
||||
/// <summary>
|
||||
/// A <see cref="Rule"/> that allows any visible character and spaces
|
||||
/// </summary>
|
||||
public static readonly Rule DefaultRule = (input, add) => {
|
||||
foreach (var c in add) {
|
||||
if (char.IsControl(c) && (!input.Multiline || c != '\n'))
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
};
|
||||
/// <summary>
|
||||
/// A <see cref="Rule"/> that only allows letters
|
||||
/// </summary>
|
||||
public static readonly Rule OnlyLetters = (input, add) => {
|
||||
foreach (var c in add) {
|
||||
if (!char.IsLetter(c))
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
};
|
||||
/// <summary>
|
||||
/// A <see cref="Rule"/> that only allows numerals
|
||||
/// </summary>
|
||||
public static readonly Rule OnlyNumbers = (input, add) => {
|
||||
foreach (var c in add) {
|
||||
if (!char.IsNumber(c))
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
};
|
||||
/// <summary>
|
||||
/// A <see cref="Rule"/> that only allows letters and numerals
|
||||
/// </summary>
|
||||
public static readonly Rule LettersNumbers = (input, add) => {
|
||||
foreach (var c in add) {
|
||||
if (!char.IsLetter(c) || !char.IsNumber(c))
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
};
|
||||
/// <summary>
|
||||
/// A <see cref="Rule"/> that only allows characters not contained in <see cref="Path.GetInvalidPathChars"/>
|
||||
/// </summary>
|
||||
public static readonly Rule PathNames = (input, add) => add.IndexOfAny(Path.GetInvalidPathChars()) < 0;
|
||||
/// <summary>
|
||||
/// A <see cref="Rule"/> that only allows characters not contained in <see cref="Path.GetInvalidFileNameChars"/>
|
||||
/// </summary>
|
||||
public static readonly Rule FileNames = (input, add) => add.IndexOfAny(Path.GetInvalidFileNameChars()) < 0;
|
||||
|
||||
/// <summary>
|
||||
/// This text input's current text
|
||||
/// </summary>
|
||||
public string Text => this.text.ToString();
|
||||
/// <summary>
|
||||
/// The length that this <see cref="TextInput"/>'s text has.
|
||||
/// </summary>
|
||||
public int Length => this.text.Length;
|
||||
/// <summary>
|
||||
/// An event that gets called when <see cref="Text"/> changes, either through input, or through a manual change.
|
||||
/// </summary>
|
||||
public TextChanged OnTextChange;
|
||||
/// <summary>
|
||||
/// The rule used for text input.
|
||||
/// Rules allow only certain characters to be allowed inside of a text input.
|
||||
/// </summary>
|
||||
public Rule InputRule;
|
||||
/// <summary>
|
||||
/// The position of the caret within the text.
|
||||
/// This is always between 0 and the <see cref="string.Length"/> of <see cref="Text"/>
|
||||
/// </summary>
|
||||
public int CaretPos {
|
||||
get => this.caretPos;
|
||||
set {
|
||||
var val = MathHelper.Clamp(value, 0, this.text.Length);
|
||||
if (this.caretPos != val) {
|
||||
this.caretPos = val;
|
||||
this.caretBlinkTimer = 0;
|
||||
this.UpdateTextData(false);
|
||||
}
|
||||
}
|
||||
}
|
||||
/// <summary>
|
||||
/// The line of text that the caret is currently on.
|
||||
/// This can only be only non-0 if <see cref="Multiline"/> is true.
|
||||
/// </summary>
|
||||
public int CaretLine { get; private set; }
|
||||
/// <summary>
|
||||
/// The position in the current <see cref="CaretLine"/> that the caret is currently on.
|
||||
/// If <see cref="Multiline"/> is false, this value is always equal to <see cref="CaretPos"/>.
|
||||
/// </summary>
|
||||
public int CaretPosInLine { get; private set; }
|
||||
/// <summary>
|
||||
/// A character that should be displayed instead of this text input's <see cref="Text"/> content.
|
||||
/// The amount of masking characters displayed will be equal to the <see cref="Text"/>'s length.
|
||||
/// This behavior is useful for password inputs or similar.
|
||||
/// </summary>
|
||||
public char? MaskingCharacter {
|
||||
get => this.maskingCharacter;
|
||||
set {
|
||||
if (this.maskingCharacter != value) {
|
||||
this.maskingCharacter = value;
|
||||
this.UpdateTextData(false);
|
||||
}
|
||||
}
|
||||
}
|
||||
/// <summary>
|
||||
/// The maximum amount of characters that can be input into this text input.
|
||||
/// If this is set, the length of <see cref="Text"/> will never exceed this value.
|
||||
/// </summary>
|
||||
public int? MaximumCharacters;
|
||||
/// <summary>
|
||||
/// Whether this text input should support multi-line editing.
|
||||
/// If this is true, pressing <see cref="Keys.Enter"/> will insert a new line into the <see cref="Text"/> if the <see cref="InputRule"/> allows it.
|
||||
/// Additionally, text will be rendered with horizontal soft wraps, and lines that are outside of the text input's bounds will be hidden.
|
||||
/// </summary>
|
||||
public bool Multiline {
|
||||
get => this.multiline;
|
||||
set {
|
||||
if (this.multiline != value) {
|
||||
this.multiline = value;
|
||||
this.UpdateTextData(false);
|
||||
}
|
||||
}
|
||||
}
|
||||
/// <summary>
|
||||
/// The font that this text input is currently using.
|
||||
/// </summary>
|
||||
public GenericFont Font {
|
||||
get => this.font;
|
||||
set {
|
||||
if (this.font != value) {
|
||||
this.font = value;
|
||||
this.UpdateTextData(false);
|
||||
}
|
||||
}
|
||||
}
|
||||
/// <summary>
|
||||
/// The scale that this text input's text has.
|
||||
/// In <see cref="Draw"/>, this is multiplied with the drawScale parameter.
|
||||
/// </summary>
|
||||
public float TextScale {
|
||||
get => this.textScale;
|
||||
set {
|
||||
if (this.textScale != value) {
|
||||
this.textScale = value;
|
||||
this.UpdateTextData(false);
|
||||
}
|
||||
}
|
||||
}
|
||||
/// <summary>
|
||||
/// The size of this text input, which is the size that this text input's <see cref="Text"/> will be bounded to in <see cref="Draw"/>.
|
||||
/// Note that <see cref="TextScale"/> gets applied to the text for calculations involving this size.
|
||||
/// </summary>
|
||||
public Vector2 Size {
|
||||
get => this.size;
|
||||
set {
|
||||
if (this.size != value) {
|
||||
this.size = value;
|
||||
this.UpdateTextData(false);
|
||||
}
|
||||
}
|
||||
}
|
||||
/// <summary>
|
||||
/// A function that is invoked when a string of text should be copied to the clipboard.
|
||||
/// MLEM.Ui uses the TextCopy package for this, but other options are available.
|
||||
/// </summary>
|
||||
public Action<string> CopyToClipboardFunction;
|
||||
/// <summary>
|
||||
/// A function that is invoked when a string of text should be pasted from the clipboard.
|
||||
/// MLEM.Ui uses the TextCopy package for this, but other options are available.
|
||||
/// </summary>
|
||||
public Func<string> PasteFromClipboardFunction;
|
||||
|
||||
private readonly StringBuilder text = new StringBuilder();
|
||||
|
||||
private char? maskingCharacter;
|
||||
private double caretBlinkTimer;
|
||||
private string displayedText;
|
||||
private string[] splitText;
|
||||
private int textOffset;
|
||||
private int lineOffset;
|
||||
private int caretPos;
|
||||
private float caretDrawOffset;
|
||||
private bool multiline;
|
||||
private GenericFont font;
|
||||
private float textScale;
|
||||
private Vector2 size;
|
||||
|
||||
/// <summary>
|
||||
/// Creates a new text input with the given settings.
|
||||
/// </summary>
|
||||
/// <param name="font">The <see cref="Font"/> to use.</param>
|
||||
/// <param name="size">The <see cref="Size"/> to set.</param>
|
||||
/// <param name="textScale">The <see cref="TextScale"/> to set.</param>
|
||||
/// <param name="inputRule">The <see cref="InputRule"/> to set.</param>
|
||||
/// <param name="copyToClipboardFunction">The <see cref="CopyToClipboardFunction"/>to set.</param>
|
||||
/// <param name="pasteFromClipboardFunction">The <see cref="PasteFromClipboardFunction"/> to set.</param>
|
||||
public TextInput(GenericFont font, Vector2 size, float textScale, Rule inputRule = null, Action<string> copyToClipboardFunction = null, Func<string> pasteFromClipboardFunction = null) {
|
||||
this.InputRule = inputRule ?? TextInput.DefaultRule;
|
||||
this.CopyToClipboardFunction = copyToClipboardFunction;
|
||||
this.PasteFromClipboardFunction = pasteFromClipboardFunction;
|
||||
this.Font = font;
|
||||
this.Size = size;
|
||||
this.TextScale = textScale;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// A method that should be called when the given text should be entered into this text input.
|
||||
/// This method is designed to be used with the <see cref="GameWindow.TextInput"/> event.
|
||||
/// </summary>
|
||||
/// <param name="key">The key that was pressed.</param>
|
||||
/// <param name="character">The character that the <paramref name="key"/> represents.</param>
|
||||
/// <returns>Whether text was successfully input.</returns>
|
||||
public bool OnTextInput(Keys key, char character) {
|
||||
if (key == Keys.Back) {
|
||||
if (this.CaretPos > 0) {
|
||||
this.CaretPos--;
|
||||
this.RemoveText(this.CaretPos, 1);
|
||||
return true;
|
||||
}
|
||||
} else if (key == Keys.Delete) {
|
||||
return this.RemoveText(this.CaretPos, 1);
|
||||
} else if (this.Multiline && key == Keys.Enter) {
|
||||
return this.InsertText('\n');
|
||||
} else {
|
||||
return this.InsertText(character);
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Updates this text input, including querying input using the given <see cref="InputHandler"/> and updating the caret's blink timer.
|
||||
/// </summary>
|
||||
/// <param name="time">The current game time.</param>
|
||||
/// <param name="input">The input handler to use for input querying.</param>
|
||||
public void Update(GameTime time, InputHandler input) {
|
||||
if (this.CaretPos > 0 && input.TryConsumePressed(Keys.Left)) {
|
||||
this.CaretPos--;
|
||||
} else if (this.CaretPos < this.text.Length && input.TryConsumePressed(Keys.Right)) {
|
||||
this.CaretPos++;
|
||||
} else if (this.Multiline && input.IsKeyPressedAvailable(Keys.Up) && this.MoveCaretToLine(this.CaretLine - 1)) {
|
||||
input.TryConsumeKeyPressed(Keys.Up);
|
||||
} else if (this.Multiline && input.IsKeyPressedAvailable(Keys.Down) && this.MoveCaretToLine(this.CaretLine + 1)) {
|
||||
input.TryConsumeKeyPressed(Keys.Down);
|
||||
} else if (this.CaretPos != 0 && input.TryConsumeKeyPressed(Keys.Home)) {
|
||||
this.CaretPos = 0;
|
||||
} else if (this.CaretPos != this.text.Length && input.TryConsumeKeyPressed(Keys.End)) {
|
||||
this.CaretPos = this.text.Length;
|
||||
} else if (input.IsModifierKeyDown(ModifierKey.Control)) {
|
||||
if (input.IsKeyPressedAvailable(Keys.V)) {
|
||||
var clip = this.PasteFromClipboardFunction?.Invoke();
|
||||
if (clip != null) {
|
||||
this.InsertText(clip, true);
|
||||
input.TryConsumeKeyPressed(Keys.V);
|
||||
}
|
||||
} else if (input.TryConsumeKeyPressed(Keys.C)) {
|
||||
// until there is text selection, just copy the whole content
|
||||
this.CopyToClipboardFunction?.Invoke(this.Text);
|
||||
}
|
||||
}
|
||||
|
||||
this.caretBlinkTimer += time.ElapsedGameTime.TotalSeconds;
|
||||
if (this.caretBlinkTimer >= 1)
|
||||
this.caretBlinkTimer = 0;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Draws this text input's displayed <see cref="Text"/> along with its caret, if <paramref name="caretWidth"/> is greater than 0.
|
||||
/// </summary>
|
||||
/// <param name="batch">The sprite batch to draw with.</param>
|
||||
/// <param name="textPos">The position to draw the text at.</param>
|
||||
/// <param name="drawScale">The draw scale, which is multiplied with <see cref="TextScale"/> before drawing.</param>
|
||||
/// <param name="caretWidth">The width that the caret should have, which is multiplied with <paramref name="drawScale"/> before drawing.</param>
|
||||
/// <param name="textColor">The color to draw the text and caret with.</param>
|
||||
public void Draw(SpriteBatch batch, Vector2 textPos, float drawScale, float caretWidth, Color textColor) {
|
||||
// handle first initialization if not done
|
||||
if (this.displayedText == null)
|
||||
this.UpdateTextData(false);
|
||||
|
||||
var scale = this.TextScale * drawScale;
|
||||
this.Font.DrawString(batch, this.displayedText, textPos, textColor, 0, Vector2.Zero, scale, SpriteEffects.None, 0);
|
||||
|
||||
if (caretWidth > 0 && this.caretBlinkTimer < 0.5F) {
|
||||
var caretDrawPos = textPos + new Vector2(this.caretDrawOffset * scale, 0);
|
||||
if (this.Multiline)
|
||||
caretDrawPos.Y += this.Font.LineHeight * (this.CaretLine - this.lineOffset) * scale;
|
||||
batch.Draw(batch.GetBlankTexture(), new RectangleF(caretDrawPos, new Vector2(caretWidth * drawScale, this.Font.LineHeight * scale)), null, textColor);
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Replaces this text input's text with the given text.
|
||||
/// If the resulting <see cref="Text"/> exceeds <see cref="MaximumCharacters"/>, the end will be cropped to fit.
|
||||
/// </summary>
|
||||
/// <param name="text">The new text</param>
|
||||
/// <param name="removeMismatching">If any characters that don't match the <see cref="InputRule"/> should be left out</param>
|
||||
public void SetText(object text, bool removeMismatching = false) {
|
||||
var strg = text?.ToString() ?? string.Empty;
|
||||
if (!this.FilterText(ref strg, removeMismatching))
|
||||
return;
|
||||
if (this.MaximumCharacters != null && strg.Length > this.MaximumCharacters)
|
||||
strg = strg.Substring(0, this.MaximumCharacters.Value);
|
||||
this.text.Clear();
|
||||
this.text.Append(strg);
|
||||
this.CaretPos = this.text.Length;
|
||||
this.UpdateTextData();
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Inserts the given text at the <see cref="CaretPos"/>.
|
||||
/// If the resulting <see cref="Text"/> exceeds <see cref="MaximumCharacters"/>, the end will be cropped to fit.
|
||||
/// </summary>
|
||||
/// <param name="text">The text to insert</param>
|
||||
/// <param name="removeMismatching">If any characters that don't match the <see cref="InputRule"/> should be left out</param>
|
||||
public bool InsertText(object text, bool removeMismatching = false) {
|
||||
var strg = text?.ToString() ?? string.Empty;
|
||||
if (!this.FilterText(ref strg, removeMismatching))
|
||||
return false;
|
||||
if (this.MaximumCharacters != null && this.text.Length + strg.Length > this.MaximumCharacters)
|
||||
strg = strg.Substring(0, this.MaximumCharacters.Value - this.text.Length);
|
||||
this.text.Insert(this.CaretPos, strg);
|
||||
this.CaretPos += strg.Length;
|
||||
this.UpdateTextData();
|
||||
return true;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Removes the given amount of text at the given index
|
||||
/// </summary>
|
||||
/// <param name="index">The index</param>
|
||||
/// <param name="length">The amount of text to remove</param>
|
||||
public bool RemoveText(int index, int length) {
|
||||
if (index < 0 || index >= this.text.Length)
|
||||
return false;
|
||||
this.text.Remove(index, length);
|
||||
// ensure that caret pos is still in bounds
|
||||
this.CaretPos = this.CaretPos;
|
||||
this.UpdateTextData();
|
||||
return true;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Moves the <see cref="CaretPos"/> to the given line, if it exists.
|
||||
/// Additionally maintains the <see cref="CaretPosInLine"/> roughly based on the visual distance that the caret has from the left border of the current <see cref="CaretLine"/>.
|
||||
/// </summary>
|
||||
/// <param name="line">The line to move the caret to</param>
|
||||
/// <returns>True if the caret was moved, false if it was not (which indicates that the line with the given <paramref name="line"/> index does not exist)</returns>
|
||||
public bool MoveCaretToLine(int line) {
|
||||
var (destStart, destEnd) = this.GetLineBounds(line);
|
||||
if (destEnd > 0) {
|
||||
// find the position whose distance from the start is closest to the current distance from the start
|
||||
var destAccum = "";
|
||||
while (destAccum.Length < destEnd - destStart) {
|
||||
if (this.Font.MeasureString(destAccum).X >= this.caretDrawOffset) {
|
||||
this.CaretPos = destStart + destAccum.Length;
|
||||
return true;
|
||||
}
|
||||
destAccum += this.text[destStart + destAccum.Length];
|
||||
}
|
||||
// if we don't find a proper position, just move to the end of the destination line
|
||||
this.CaretPos = destEnd;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
private bool FilterText(ref string text, bool removeMismatching) {
|
||||
if (removeMismatching) {
|
||||
var result = new StringBuilder();
|
||||
foreach (var c in text) {
|
||||
if (this.InputRule(this, c.ToCachedString()))
|
||||
result.Append(c);
|
||||
}
|
||||
text = result.ToString();
|
||||
} else if (!this.InputRule(this, text))
|
||||
return false;
|
||||
return true;
|
||||
}
|
||||
|
||||
private void UpdateTextData(bool textChanged = true) {
|
||||
if (this.Font == null)
|
||||
return;
|
||||
if (this.Multiline) {
|
||||
// soft wrap if we're multiline
|
||||
this.splitText = this.Font.SplitStringSeparate(this.text, this.Size.X, this.TextScale).ToArray();
|
||||
this.displayedText = string.Join("\n", this.splitText);
|
||||
this.UpdateCaretData();
|
||||
|
||||
if (this.Font.MeasureString(this.displayedText).Y * this.TextScale > this.Size.Y) {
|
||||
var maxLines = (this.Size.Y / (this.Font.LineHeight * this.TextScale)).Floor();
|
||||
if (this.lineOffset > this.CaretLine) {
|
||||
// if we're moving up
|
||||
this.lineOffset = this.CaretLine;
|
||||
} else if (this.CaretLine >= maxLines) {
|
||||
// if we're moving down
|
||||
var limit = this.CaretLine - (maxLines - 1);
|
||||
if (limit > this.lineOffset)
|
||||
this.lineOffset = limit;
|
||||
}
|
||||
// calculate resulting string
|
||||
var ret = new StringBuilder();
|
||||
var lines = 0;
|
||||
var originalIndex = 0;
|
||||
for (var i = 0; i < this.displayedText.Length; i++) {
|
||||
if (lines >= this.lineOffset) {
|
||||
if (ret.Length <= 0)
|
||||
this.textOffset = originalIndex;
|
||||
ret.Append(this.displayedText[i]);
|
||||
}
|
||||
if (this.displayedText[i] == '\n') {
|
||||
lines++;
|
||||
if (this.text[originalIndex] == '\n')
|
||||
originalIndex++;
|
||||
} else {
|
||||
originalIndex++;
|
||||
}
|
||||
if (lines - this.lineOffset >= maxLines)
|
||||
break;
|
||||
}
|
||||
this.displayedText = ret.ToString();
|
||||
} else {
|
||||
this.lineOffset = 0;
|
||||
this.textOffset = 0;
|
||||
}
|
||||
} else {
|
||||
// not multiline, so scroll horizontally based on caret position
|
||||
if (this.Font.MeasureString(this.text).X * this.TextScale > this.Size.X) {
|
||||
if (this.textOffset > this.CaretPos) {
|
||||
// if we're moving the caret to the left
|
||||
this.textOffset = this.CaretPos;
|
||||
} else {
|
||||
// if we're moving the caret to the right
|
||||
var importantArea = this.text.ToString(this.textOffset, Math.Min(this.CaretPos, this.text.Length) - this.textOffset);
|
||||
var bound = this.CaretPos - this.Font.TruncateString(importantArea, this.Size.X, this.TextScale, true).Length;
|
||||
if (this.textOffset < bound)
|
||||
this.textOffset = bound;
|
||||
}
|
||||
var visible = this.text.ToString(this.textOffset, this.text.Length - this.textOffset);
|
||||
this.displayedText = this.Font.TruncateString(visible, this.Size.X, this.TextScale);
|
||||
} else {
|
||||
this.displayedText = this.Text;
|
||||
this.textOffset = 0;
|
||||
}
|
||||
this.UpdateCaretData();
|
||||
}
|
||||
|
||||
if (this.MaskingCharacter != null)
|
||||
this.displayedText = new string(this.MaskingCharacter.Value, this.displayedText.Length);
|
||||
|
||||
if (textChanged)
|
||||
this.OnTextChange?.Invoke(this, this.Text);
|
||||
}
|
||||
|
||||
private void UpdateCaretData() {
|
||||
if (this.splitText != null) {
|
||||
var line = 0;
|
||||
var index = 0;
|
||||
for (var d = 0; d < this.splitText.Length; d++) {
|
||||
var startOfLine = 0;
|
||||
var split = this.splitText[d];
|
||||
for (var i = 0; i <= split.Length; i++) {
|
||||
if (index == this.CaretPos) {
|
||||
this.CaretLine = line;
|
||||
this.CaretPosInLine = i - startOfLine;
|
||||
this.caretDrawOffset = this.Font.MeasureString(split.Substring(startOfLine, this.CaretPosInLine)).X;
|
||||
return;
|
||||
}
|
||||
if (i < split.Length) {
|
||||
// manual splits
|
||||
if (split[i] == '\n') {
|
||||
startOfLine = i + 1;
|
||||
line++;
|
||||
}
|
||||
index++;
|
||||
}
|
||||
}
|
||||
// max width splits
|
||||
line++;
|
||||
}
|
||||
} else if (this.displayedText != null) {
|
||||
this.CaretLine = 0;
|
||||
this.CaretPosInLine = this.CaretPos;
|
||||
this.caretDrawOffset = this.Font.MeasureString(this.displayedText.Substring(0, this.CaretPos - this.textOffset)).X;
|
||||
}
|
||||
}
|
||||
|
||||
private (int, int) GetLineBounds(int boundLine) {
|
||||
if (this.splitText != null) {
|
||||
var line = 0;
|
||||
var index = 0;
|
||||
var startOfLineIndex = 0;
|
||||
for (var d = 0; d < this.splitText.Length; d++) {
|
||||
var split = this.splitText[d];
|
||||
for (var i = 0; i < split.Length; i++) {
|
||||
index++;
|
||||
if (split[i] == '\n') {
|
||||
if (boundLine == line)
|
||||
return (startOfLineIndex, index - 1);
|
||||
line++;
|
||||
startOfLineIndex = index;
|
||||
}
|
||||
}
|
||||
if (boundLine == line)
|
||||
return (startOfLineIndex, index - 1);
|
||||
line++;
|
||||
startOfLineIndex = index;
|
||||
}
|
||||
}
|
||||
return default;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// A delegate method used for <see cref="TextInput.OnTextChange"/>
|
||||
/// </summary>
|
||||
/// <param name="input">The text input whose text changed</param>
|
||||
/// <param name="text">The new text</param>
|
||||
public delegate void TextChanged(TextInput input, string text);
|
||||
|
||||
/// <summary>
|
||||
/// A delegate method used for <see cref="InputRule"/>.
|
||||
/// It should return whether the given text can be added to the text input.
|
||||
/// </summary>
|
||||
/// <param name="input">The text input</param>
|
||||
/// <param name="textToAdd">The text that is tried to be added</param>
|
||||
public delegate bool Rule(TextInput input, string textToAdd);
|
||||
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue