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Allow specifying a maximum amount of characters for a TextField

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Ell 2021-10-11 23:35:50 +02:00
parent fd5b83eaa0
commit 8f5d3083b5
2 changed files with 20 additions and 5 deletions
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3
CHANGELOG.md
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@ -12,6 +12,9 @@ Additions
- Added a strikethrough formatting code
### MLEM.Ui
Additions
- Allow specifying a maximum amount of characters for a TextField
Improvements
- Cache TokenizedString inner offsets for non-Left text alignments to improve performance

22
MLEM.Ui/Elements/TextField.cs
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@ -158,6 +158,11 @@ namespace MLEM.Ui.Elements {
this.HandleTextChange(false);
}
}
/// <summary>
/// The maximum amount of characters that can be input into this text field.
/// If this is set, the length of <see cref="Text"/> will never exceed this value.
/// </summary>
public int? MaximumCharacters;
private readonly StringBuilder text = new StringBuilder();
@ -305,33 +310,40 @@ namespace MLEM.Ui.Elements {
/// <summary>
/// Replaces this text field'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 (removeMismatching) {
var result = new StringBuilder();
foreach (var c in text.ToString()) {
foreach (var c in strg) {
if (this.InputRule(this, c.ToCachedString()))
result.Append(c);
}
text = result.ToString();
} else if (!this.InputRule(this, text.ToString()))
strg = result.ToString();
} else if (!this.InputRule(this, strg))
return;
if (this.MaximumCharacters != null && strg.Length > this.MaximumCharacters)
strg = strg.Substring(0, this.MaximumCharacters.Value);
this.text.Clear();
this.text.Append(text);
this.text.Append(strg);
this.CaretPos = this.text.Length;
this.HandleTextChange();
}
/// <summary>
/// Inserts the given text at the <see cref="CaretPos"/>
/// 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>
public void InsertText(object text) {
var strg = text.ToString();
if (!this.InputRule(this, strg))
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();