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Support terminal palette, fixes #620
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262 changes: 262 additions & 0 deletions
262
terminal/src/main/java/org/jline/utils/ColorPalette.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,262 @@ | ||
| /* | ||
| * Copyright (c) 2002-2020, the original author or authors. | ||
| * | ||
| * This software is distributable under the BSD license. See the terms of the | ||
| * BSD license in the documentation provided with this software. | ||
| * | ||
| * https://opensource.org/licenses/BSD-3-Clause | ||
| */ | ||
| package org.jline.utils; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.PrintWriter; | ||
| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
|
|
||
| import org.jline.terminal.Terminal; | ||
|
|
||
| /** | ||
| * Color palette | ||
| */ | ||
| public class ColorPalette { | ||
|
|
||
| public static final String XTERM_INITC = "\\E]4;%p1%d;rgb\\:%p2%{255}%*%{1000}%/%2.2X/%p3%{255}%*%{1000}%/%2.2X/%p4%{255}%*%{1000}%/%2.2X\\E\\\\"; | ||
|
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| public static final ColorPalette DEFAULT = new ColorPalette(); | ||
|
|
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| private final Terminal terminal; | ||
| private String distanceName; | ||
| private Colors.Distance distance; | ||
| private boolean osc4; | ||
| private int[] palette; | ||
|
|
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| public ColorPalette() { | ||
| this.terminal = null; | ||
| this.distanceName = null; | ||
| this.palette = Colors.DEFAULT_COLORS_256; | ||
| } | ||
|
|
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| public ColorPalette(Terminal terminal) throws IOException { | ||
| this(terminal, null); | ||
| } | ||
|
|
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| public ColorPalette(Terminal terminal, String distance) throws IOException { | ||
| this.terminal = terminal; | ||
| this.distanceName = distance; | ||
| loadPalette(false); | ||
| } | ||
|
|
||
| /** | ||
| * Get the name of the distance to use for rounding colors. | ||
| * @return the name of the color distance | ||
| */ | ||
| public String getDistanceName() { | ||
| return distanceName; | ||
| } | ||
|
|
||
| /** | ||
| * Set the name of the color distance to use when rounding RGB colors to the palette. | ||
| * @param name the name of the color distance | ||
| */ | ||
| public void setDistance(String name) { | ||
| this.distanceName = name; | ||
| } | ||
|
|
||
| /** | ||
| * Check if the terminal has the capability to change colors. | ||
| * @return <code>true</code> if the terminal can change colors | ||
| */ | ||
| public boolean canChange() { | ||
| return terminal != null && terminal.getBooleanCapability(InfoCmp.Capability.can_change); | ||
| } | ||
|
|
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| /** | ||
| * Load the palette from the terminal. | ||
| * If the palette has already been loaded, subsequent calls will simply return <code>true</code>. | ||
| * | ||
| * @return <code>true</code> if the palette has been successfully loaded. | ||
| * @throws IOException | ||
| */ | ||
| public boolean loadPalette() throws IOException { | ||
| if (!osc4) { | ||
| loadPalette(true); | ||
| } | ||
| return osc4; | ||
| } | ||
|
|
||
| protected void loadPalette(boolean doLoad) throws IOException { | ||
| if (terminal != null) { | ||
| int[] pal = doLoad ? doLoad(terminal) : null; | ||
| if (pal != null) { | ||
| this.palette = pal; | ||
| this.osc4 = true; | ||
| } else { | ||
| Integer cols = terminal.getNumericCapability(InfoCmp.Capability.max_colors); | ||
| if (cols != null) { | ||
| if (cols == Colors.DEFAULT_COLORS_88.length) { | ||
| this.palette = Colors.DEFAULT_COLORS_88; | ||
| } else { | ||
| this.palette = Arrays.copyOf(Colors.DEFAULT_COLORS_256, Math.min(cols, 256)); | ||
| } | ||
| } else { | ||
| this.palette = Arrays.copyOf(Colors.DEFAULT_COLORS_256, 256); | ||
| } | ||
| this.osc4 = false; | ||
| } | ||
| } else { | ||
| this.palette = Colors.DEFAULT_COLORS_256; | ||
| this.osc4 = false; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Get the palette length | ||
| * @return the palette length | ||
| */ | ||
| public int getLength() { | ||
| return this.palette.length; | ||
| } | ||
|
|
||
| /** | ||
| * Get a specific color in the palette | ||
| * @param index the index of the color | ||
| * @return the color at the given index | ||
| */ | ||
| public int getColor(int index) { | ||
| return palette[index]; | ||
| } | ||
|
|
||
| /** | ||
| * Change the color of the palette | ||
| * @param index the index of the color | ||
| * @param color the new color value | ||
| */ | ||
| public void setColor(int index, int color) { | ||
| palette[index] = color; | ||
| if (canChange()) { | ||
| String initc = terminal.getStringCapability(InfoCmp.Capability.initialize_color); | ||
| if (initc != null || osc4) { | ||
| // initc expects color in 0..1000 range | ||
| int r = (((color >> 16) & 0xFF) * 1000) / 255 + 1; | ||
| int g = (((color >> 8) & 0xFF) * 1000) / 255 + 1; | ||
| int b = ((color & 0xFF) * 1000) / 255 + 1; | ||
| if (initc == null) { | ||
| // This is the xterm version | ||
| initc = XTERM_INITC; | ||
| } | ||
| Curses.tputs(terminal.writer(), initc, index, r, g, b); | ||
| terminal.writer().flush(); | ||
| } | ||
| } | ||
| } | ||
|
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||
| public boolean isReal() { | ||
| return osc4; | ||
| } | ||
|
|
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| public int round(int r, int g, int b) { | ||
| return Colors.roundColor((r << 16) + (g << 8) + b, palette, palette.length, getDist()); | ||
| } | ||
|
|
||
| public int round(int col) { | ||
| if (col >= palette.length) { | ||
| col = Colors.roundColor(DEFAULT.getColor(col), palette, palette.length, getDist()); | ||
| } | ||
| return col; | ||
| } | ||
|
|
||
| protected Colors.Distance getDist() { | ||
| if (distance == null) { | ||
| distance = Colors.getDistance(distanceName); | ||
| } | ||
| return distance; | ||
| } | ||
|
|
||
| private static int[] doLoad(Terminal terminal) throws IOException { | ||
| PrintWriter writer = terminal.writer(); | ||
| NonBlockingReader reader = terminal.reader(); | ||
|
|
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| int[] palette = new int[256]; | ||
| for (int i = 0; i < 16; i++) { | ||
| StringBuilder req = new StringBuilder(1024); | ||
| req.append("\033]4"); | ||
| for (int j = 0; j < 16; j++) { | ||
| req.append(';').append(i * 16 + j).append(";?"); | ||
| } | ||
| req.append("\033\\"); | ||
| writer.write(req.toString()); | ||
| writer.flush(); | ||
|
|
||
| boolean black = true; | ||
| for (int j = 0; j < 16; j++) { | ||
| if (reader.peek(50) < 0) { | ||
| break; | ||
| } | ||
| if (reader.read(10) != '\033' | ||
| || reader.read(10) != ']' | ||
| || reader.read(10) != '4' | ||
| || reader.read(10) != ';') { | ||
| return null; | ||
| } | ||
| int idx = 0; | ||
| int c; | ||
| while (true) { | ||
| c = reader.read(10); | ||
| if (c >= '0' && c <= '9') { | ||
| idx = idx * 10 + (c - '0'); | ||
| } else if (c == ';') { | ||
| break; | ||
| } else { | ||
| return null; | ||
| } | ||
| } | ||
| if (idx > 255) { | ||
| return null; | ||
| } | ||
| if (reader.read(10) != 'r' | ||
| || reader.read(10) != 'g' | ||
| || reader.read(10) != 'b' | ||
| || reader.read(10) != ':') { | ||
| return null; | ||
| } | ||
| StringBuilder sb = new StringBuilder(16); | ||
| List<String> rgb = new ArrayList<>(); | ||
| while (true) { | ||
| c = reader.read(10); | ||
| if (c == '\007') { | ||
| rgb.add(sb.toString()); | ||
| break; | ||
| } else if (c == '\033') { | ||
| c = reader.read(10); | ||
| if (c == '\\') { | ||
| rgb.add(sb.toString()); | ||
| break; | ||
| } else { | ||
| return null; | ||
| } | ||
| } else if (c >= '0' && c <= '9' || c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z') { | ||
| sb.append((char) c); | ||
| } else if (c == '/') { | ||
| rgb.add(sb.toString()); | ||
| sb.setLength(0); | ||
| } | ||
| } | ||
| if (rgb.size() != 3) { | ||
| return null; | ||
| } | ||
| double r = Integer.parseInt(rgb.get(0), 16) / ((1 << (4 * rgb.get(0).length())) - 1.0); | ||
| double g = Integer.parseInt(rgb.get(1), 16) / ((1 << (4 * rgb.get(1).length())) - 1.0); | ||
| double b = Integer.parseInt(rgb.get(2), 16) / ((1 << (4 * rgb.get(2).length())) - 1.0); | ||
| palette[idx] = (int)((Math.round(r * 255) << 16) + (Math.round(g * 255) << 8) + Math.round(b * 255)); | ||
| black &= palette[idx] == 0; | ||
| } | ||
| if (black) { | ||
| break; | ||
| } | ||
| } | ||
| int max = 256; | ||
| while (max > 0 && palette[--max] == 0); | ||
| return Arrays.copyOfRange(palette, 0, max + 1); | ||
| } | ||
| } |