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231 lines
No EOL
12 KiB
C#
231 lines
No EOL
12 KiB
C#
using System.Collections.Generic;
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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 MLEM.Extensions;
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using MLEM.Font;
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using MLEM.Formatting.Codes;
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using MLEM.Misc;
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namespace MLEM.Formatting {
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/// <summary>
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/// A tokenized string that was created using a <see cref="TextFormatter"/>
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/// </summary>
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public class TokenizedString : GenericDataHolder {
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/// <summary>
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/// The raw string that was used to create this tokenized string.
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/// </summary>
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public readonly string RawString;
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/// <summary>
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/// The <see cref="RawString"/>, but with formatting codes stripped out.
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/// </summary>
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public readonly string String;
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/// <summary>
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/// The string that is actually displayed by this tokenized string.
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/// If this string has been <see cref="Split"/> or <see cref="Truncate"/> has been used, this string will contain the newline characters.
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/// </summary>
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public string DisplayString => this.modifiedString ?? this.String;
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/// <summary>
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/// The tokens that this tokenized string contains.
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/// </summary>
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public readonly Token[] Tokens;
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/// <summary>
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/// All of the formatting codes that are applied over this tokenized string.
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/// Note that, to get a formatting code for a certain token, use <see cref="Token.AppliedCodes"/>
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/// </summary>
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public readonly Code[] AllCodes;
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private string modifiedString;
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private float initialInnerOffset;
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internal TokenizedString(GenericFont font, TextAlignment alignment, string rawString, string strg, Token[] tokens) {
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this.RawString = rawString;
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this.String = strg;
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this.Tokens = tokens;
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// since a code can be present in multiple tokens, we use Distinct here
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this.AllCodes = tokens.SelectMany(t => t.AppliedCodes).Distinct().ToArray();
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this.RecalculateTokenData(font, alignment);
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}
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/// <summary>
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/// Splits this tokenized string, inserting newline characters if the width of the string is bigger than the maximum width.
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/// Note that a tokenized string can be re-split without losing any of its actual data, as this operation merely modifies the <see cref="DisplayString"/>.
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/// <seealso cref="GenericFont.SplitString"/>
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/// </summary>
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/// <param name="font">The font to use for width calculations</param>
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/// <param name="width">The maximum width, in display pixels based on the font and scale</param>
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/// <param name="scale">The scale to use for width measurements</param>
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/// <param name="alignment">The text alignment that should be used for width calculations</param>
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public void Split(GenericFont font, float width, float scale, TextAlignment alignment = TextAlignment.Left) {
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// a split string has the same character count as the input string but with newline characters added
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this.modifiedString = font.SplitString(this.String, width, scale);
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this.StoreModifiedSubstrings(font, alignment);
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}
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/// <summary>
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/// Truncates this tokenized string, removing any additional characters that exceed the length from the displayed string.
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/// Note that a tokenized string can be re-truncated without losing any of its actual data, as this operation merely modifies the <see cref="DisplayString"/>.
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/// <seealso cref="GenericFont.TruncateString"/>
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/// </summary>
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/// <param name="font">The font to use for width calculations</param>
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/// <param name="width">The maximum width, in display pixels based on the font and scale</param>
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/// <param name="scale">The scale to use for width measurements</param>
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/// <param name="ellipsis">The characters to add to the end of the string if it is too long</param>
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/// <param name="alignment">The text alignment that should be used for width calculations</param>
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public void Truncate(GenericFont font, float width, float scale, string ellipsis = "", TextAlignment alignment = TextAlignment.Left) {
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this.modifiedString = font.TruncateString(this.String, width, scale, false, ellipsis);
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this.StoreModifiedSubstrings(font, alignment);
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}
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/// <inheritdoc cref="GenericFont.MeasureString(string,bool)"/>
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public Vector2 Measure(GenericFont font) {
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return font.MeasureString(this.DisplayString);
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}
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/// <summary>
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/// Updates the formatting codes in this formatted string, causing animations to animate etc.
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/// </summary>
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/// <param name="time">The game's time</param>
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public void Update(GameTime time) {
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foreach (var code in this.AllCodes)
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code.Update(time);
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}
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/// <summary>
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/// Returns the token under the given position.
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/// This can be used for hovering effects when the mouse is over a token, etc.
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/// </summary>
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/// <param name="stringPos">The position that the string is drawn at</param>
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/// <param name="target">The position to use for checking the token</param>
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/// <param name="scale">The scale that the string is drawn at</param>
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/// <returns>The token under the target position</returns>
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public Token GetTokenUnderPos(Vector2 stringPos, Vector2 target, float scale) {
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foreach (var token in this.Tokens) {
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foreach (var rect in token.GetArea(stringPos, scale)) {
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if (rect.Contains(target))
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return token;
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}
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}
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return null;
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}
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/// <inheritdoc cref="GenericFont.DrawString(SpriteBatch,string,Vector2,Color,float,Vector2,float,SpriteEffects,float)"/>
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public void Draw(GameTime time, SpriteBatch batch, Vector2 pos, GenericFont font, Color color, float scale, float depth, TextAlignment alignment = TextAlignment.Left) {
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var innerOffset = new Vector2(this.initialInnerOffset * scale, 0);
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for (var t = 0; t < this.Tokens.Length; t++) {
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var token = this.Tokens[t];
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var drawFont = token.GetFont(font) ?? font;
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var drawColor = token.GetColor(color) ?? color;
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for (var l = 0; l < token.SplitDisplayString.Length; l++) {
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var line = token.SplitDisplayString[l];
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for (var i = 0; i < line.Length; i++) {
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var c = line[i];
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if (l == 0 && i == 0)
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token.DrawSelf(time, batch, pos + innerOffset, font, color, scale, depth);
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var cString = c.ToCachedString();
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token.DrawCharacter(time, batch, c, cString, i, pos + innerOffset, drawFont, drawColor, scale, depth);
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innerOffset.X += font.MeasureString(cString).X * scale;
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}
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// only split at a new line, not between tokens!
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if (l < token.SplitDisplayString.Length - 1) {
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innerOffset.X = token.InnerOffsets[l] * scale;
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innerOffset.Y += font.LineHeight * scale;
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}
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}
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}
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}
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private void StoreModifiedSubstrings(GenericFont font, TextAlignment alignment) {
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if (this.Tokens.Length == 1) {
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// skip substring logic for unformatted text
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this.Tokens[0].ModifiedSubstring = this.modifiedString;
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} else {
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// this is basically a substring function that ignores added newlines for indexing
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var index = 0;
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var currToken = 0;
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var splitIndex = 0;
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var ret = new StringBuilder();
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while (splitIndex < this.modifiedString.Length && currToken < this.Tokens.Length) {
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var token = this.Tokens[currToken];
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if (token.Substring.Length > 0) {
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ret.Append(this.modifiedString[splitIndex]);
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// if the current char is not an added newline, we simulate length increase
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if (this.modifiedString[splitIndex] != '\n' || this.String[index] == '\n')
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index++;
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splitIndex++;
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}
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// move on to the next token if we reached its end
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if (index >= token.Index + token.Substring.Length) {
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token.ModifiedSubstring = ret.ToString();
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ret.Clear();
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currToken++;
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}
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}
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// set additional token contents beyond our string in case we truncated
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if (ret.Length > 0)
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this.Tokens[currToken++].ModifiedSubstring = ret.ToString();
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while (currToken < this.Tokens.Length)
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this.Tokens[currToken++].ModifiedSubstring = string.Empty;
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}
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this.RecalculateTokenData(font, alignment);
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}
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private void RecalculateTokenData(GenericFont font, TextAlignment alignment) {
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// split display strings
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foreach (var token in this.Tokens)
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token.SplitDisplayString = token.DisplayString.Split('\n');
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// token areas
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this.initialInnerOffset = this.GetInnerOffsetX(font, 0, 0, alignment);
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var innerOffset = new Vector2(this.initialInnerOffset, 0);
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for (var t = 0; t < this.Tokens.Length; t++) {
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var token = this.Tokens[t];
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token.InnerOffsets = new float[token.SplitDisplayString.Length - 1];
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var area = new List<RectangleF>();
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for (var l = 0; l < token.SplitDisplayString.Length; l++) {
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var size = font.MeasureString(token.SplitDisplayString[l]);
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var rect = new RectangleF(innerOffset, size);
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if (!rect.IsEmpty)
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area.Add(rect);
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if (l < token.SplitDisplayString.Length - 1) {
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innerOffset.X = token.InnerOffsets[l] = this.GetInnerOffsetX(font, t, l + 1, alignment);
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innerOffset.Y += font.LineHeight;
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} else {
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innerOffset.X += size.X;
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}
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}
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token.Area = area.ToArray();
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}
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}
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private float GetInnerOffsetX(GenericFont font, int tokenIndex, int lineIndex, TextAlignment alignment) {
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if (alignment > TextAlignment.Left) {
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var token = this.Tokens[tokenIndex];
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var restOfLine = font.MeasureString(token.SplitDisplayString[lineIndex], true).X;
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if (lineIndex >= token.SplitDisplayString.Length - 1) {
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// the line ends somewhere in or after the next token
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for (var i = tokenIndex + 1; i < this.Tokens.Length; i++) {
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var other = this.Tokens[i];
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if (other.SplitDisplayString.Length > 1) {
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// the line ends in this token
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restOfLine += font.MeasureString(other.SplitDisplayString[0]).X;
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break;
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} else {
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// the line doesn't end in this token, so add it fully
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restOfLine += font.MeasureString(other.DisplayString).X;
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}
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}
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}
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if (alignment == TextAlignment.Center)
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restOfLine /= 2;
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return -restOfLine;
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}
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return 0;
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}
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}
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} |