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0a0208409a
Some style guides say you should only put one space between sentences, but I and many others still put two. The line-folding code was only eating one of them when they straddled the end of the line, which looked a little funny because the following line was indented by one space. This tweaks the code to eat both spaces. Regression test updated. Also, nudge some UI elements so they line up.
284 lines
11 KiB
C#
284 lines
11 KiB
C#
/*
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* Copyright 2019 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Windows.Media;
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using System.Text;
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namespace SourceGen {
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/// <summary>
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/// Representation of a multi-line comment, which is a string plus some format directives.
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/// Used for long comments and notes.
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///
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/// Instances are immutable.
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/// </summary>
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public class MultiLineComment {
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/// <summary>
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/// If set, sticks a MaxWidth "ruler" at the top, and makes spaces visible.
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/// </summary>
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public static bool DebugShowRuler { get; set; }
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/// <summary>
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/// Unformatted text.
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/// </summary>
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public string Text { get; private set; }
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/// <summary>
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/// Set to true to render text surrounded by a box of ASCII characters.
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/// </summary>
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public bool BoxMode { get; private set; }
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/// <summary>
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/// Maximum line width. Box mode effectively reduces this by four.
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/// </summary>
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public int MaxWidth { get; private set; }
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/// <summary>
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/// Background color for notes.
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/// </summary>
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public Color BackgroundColor { get; private set; }
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/// <summary>
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/// Constructor. Object will have a max width of 80 and not be boxed.
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/// </summary>
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/// <param name="text">Unformatted comment text.</param>
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public MultiLineComment(string text) {
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Debug.Assert(text != null); // empty string is okay
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Text = text;
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BoxMode = false;
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MaxWidth = 80;
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BackgroundColor = CommonWPF.Helper.ZeroColor;
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}
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/// <summary>
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/// Constructor. Used for long comments.
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/// </summary>
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/// <param name="text">Unformatted text.</param>
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/// <param name="boxMode">Set to true to enable box mode.</param>
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/// <param name="maxWidth">Maximum line width.</param>
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public MultiLineComment(string text, bool boxMode, int maxWidth) : this(text) {
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Debug.Assert((!boxMode && maxWidth > 1) || (boxMode && maxWidth > 5));
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BoxMode = boxMode;
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MaxWidth = maxWidth;
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}
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/// <summary>
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/// Constructor. Used for notes.
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/// </summary>
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/// <param name="text">Unformatted text.</param>
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/// <param name="bkgndColor">Background color.</param>
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public MultiLineComment(string text, Color bkgndColor) : this(text) {
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BackgroundColor = bkgndColor;
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}
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/// <summary>
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/// Generates one or more lines of formatted text.
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/// </summary>
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/// <param name="formatter">Formatter, with comment delimiters.</param>
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/// <param name="textPrefix">String to prepend to text before formatting. If this
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/// is non-empty, comment delimiters aren't emitted. (Used for notes.)</param>
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/// <returns>Array of formatted strings.</returns>
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public List<string> FormatText(Asm65.Formatter formatter, string textPrefix) {
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const char boxChar = '*';
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const char spcRep = '\u2219';
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string workString = string.IsNullOrEmpty(textPrefix) ? Text : textPrefix + Text;
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List<string> lines = new List<string>();
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string linePrefix;
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if (!string.IsNullOrEmpty(textPrefix)) {
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linePrefix = string.Empty;
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} else if (BoxMode) {
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linePrefix = formatter.BoxLineCommentDelimiter;
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} else {
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linePrefix = formatter.FullLineCommentDelimiter;
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}
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StringBuilder sb = new StringBuilder(MaxWidth);
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if (DebugShowRuler) {
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for (int i = 0; i < MaxWidth; i++) {
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sb.Append((i % 10).ToString());
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}
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lines.Add(sb.ToString());
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sb.Clear();
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}
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string boxLine, spaces;
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if (BoxMode) {
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for (int i = 0; i < MaxWidth - linePrefix.Length; i++) {
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sb.Append(boxChar);
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}
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boxLine = sb.ToString();
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sb.Clear();
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for (int i = 0; i < MaxWidth; i++) {
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sb.Append(' ');
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}
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spaces = sb.ToString();
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sb.Clear();
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} else {
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boxLine = spaces = null;
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}
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if (BoxMode && workString.Length > 0) {
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lines.Add(linePrefix + boxLine);
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}
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int lineWidth = BoxMode ?
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MaxWidth - linePrefix.Length - 4 :
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MaxWidth - linePrefix.Length;
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int startIndex = 0;
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int breakIndex = -1;
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for (int i = 0; i < workString.Length; i++) {
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// Spaces and hyphens are different. For example, if width is 10,
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// "long words<space>more words" becomes:
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// 0123456789
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// long words
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// more words
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// However, "long words-more words" becomes:
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// long
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// words-more
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// words
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// because the hyphen is retained but the space is discarded.
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if (workString[i] == '\r' || workString[i] == '\n') {
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// explicit line break, emit line
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string str = workString.Substring(startIndex, i - startIndex);
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if (DebugShowRuler) { str = str.Replace(' ', spcRep); }
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if (BoxMode) {
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if (str == "" + boxChar) {
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// asterisk on a line by itself means "output row of asterisks"
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str = linePrefix + boxLine;
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} else {
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int padLen = lineWidth - str.Length;
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str = linePrefix + boxChar + " " + str +
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spaces.Substring(0, padLen + 1) + boxChar;
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}
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} else {
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str = linePrefix + str;
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}
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lines.Add(str);
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// Eat the LF in CRLF. We don't actually work right with just LF,
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// because this will consume LFLF, but it's okay to insist that the
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// string use CRLF for line breaks.
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if (i < workString.Length - 1 && workString[i + 1] == '\n') {
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i++;
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}
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startIndex = i + 1;
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breakIndex = -1;
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} else if (workString[i] == ' ') {
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// can break on a space even if it's one char too far
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breakIndex = i;
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}
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if (i - startIndex >= lineWidth) {
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// this character was one too many, break line one back
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if (breakIndex <= 0) {
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// no break found, just chop it
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string str = workString.Substring(startIndex, i - startIndex);
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if (DebugShowRuler) { str = str.Replace(' ', spcRep); }
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if (BoxMode) {
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str = linePrefix + boxChar + " " + str + " " + boxChar;
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} else {
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str = linePrefix + str;
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}
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lines.Add(str);
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startIndex = i;
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} else {
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// Copy everything from start to break. If the break was a hyphen,
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// we want to keep it.
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int adj = 0;
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if (workString[breakIndex] == '-') {
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adj = 1;
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}
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string str = workString.Substring(startIndex,
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breakIndex + adj - startIndex);
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if (DebugShowRuler) { str = str.Replace(' ', spcRep); }
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if (BoxMode) {
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int padLen = lineWidth - str.Length;
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str = linePrefix + boxChar + " " + str +
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spaces.Substring(0, padLen + 1) + boxChar;
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} else {
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str = linePrefix + str;
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}
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lines.Add(str);
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startIndex = breakIndex + 1;
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if (adj == 0 && startIndex < workString.Length &&
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workString[startIndex] == ' ') {
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// We broke on a space, and are now starting a line on a space,
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// which looks weird (and happens commonly at the end of a
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// sentence). Eat one more space.
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startIndex++;
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}
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breakIndex = -1;
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}
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}
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if (workString[i] == '-') {
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// can break on hyphen if it fits in line
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breakIndex = i;
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}
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}
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if (startIndex < workString.Length) {
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// Output remainder.
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string str = workString.Substring(startIndex, workString.Length - startIndex);
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if (DebugShowRuler) { str = str.Replace(' ', spcRep); }
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if (BoxMode) {
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int padLen = lineWidth - str.Length;
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str = linePrefix + boxChar + " " + str +
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spaces.Substring(0, padLen + 1) + boxChar;
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} else {
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str = linePrefix + str;
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}
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lines.Add(str);
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}
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if (BoxMode && workString.Length > 0) {
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lines.Add(linePrefix + boxLine);
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}
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return lines;
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}
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public override string ToString() {
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return "MLC box=" + BoxMode + " width=" + MaxWidth + " text='" + Text + "'";
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}
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public static bool operator ==(MultiLineComment a, MultiLineComment b) {
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if (ReferenceEquals(a, b)) {
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return true; // same object, or both null
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}
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if (ReferenceEquals(a, null) || ReferenceEquals(b, null)) {
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return false; // one is null
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}
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return a.Text.Equals(b.Text) && a.BoxMode == b.BoxMode && a.MaxWidth == b.MaxWidth
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&& a.BackgroundColor == b.BackgroundColor;
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}
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public static bool operator !=(MultiLineComment a, MultiLineComment b) {
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return !(a == b);
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}
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public override bool Equals(object obj) {
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return obj is MultiLineComment && this == (MultiLineComment)obj;
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}
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public override int GetHashCode() {
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return Text.GetHashCode() ^ MaxWidth ^ (BoxMode ? 1 : 0) ^ BackgroundColor.GetHashCode();
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}
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}
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}
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