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Render ANSI dim terminal text

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Codex
2026-07-11 08:41:33 +00:00
parent 6a1052d437
commit 3dd749b872
1 changed files with 27 additions and 3 deletions
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app/src/main/java/com/neatstudio/tmuxandroid/TerminalScreenBuffer.java
+27 -3
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@@ -14,6 +14,7 @@ import java.util.List;
final class TerminalScreenBuffer {
private static final int DEFAULT_FG = 0xffe6ebf2;
private static final int DEFAULT_BG = Color.TRANSPARENT;
private static final int TERMINAL_BG = 0xff0b0e13;
private int cols;
private int rows;
@@ -27,6 +28,7 @@ final class TerminalScreenBuffer {
private int fg = DEFAULT_FG;
private int bg = DEFAULT_BG;
private boolean bold;
private boolean dim;
TerminalScreenBuffer(int cols, int rows) {
resize(cols, rows);
@@ -74,6 +76,7 @@ final class TerminalScreenBuffer {
fg = DEFAULT_FG;
bg = DEFAULT_BG;
bold = false;
dim = false;
}
void write(String text) {
@@ -257,10 +260,14 @@ final class TerminalScreenBuffer {
fg = DEFAULT_FG;
bg = DEFAULT_BG;
bold = false;
dim = false;
} else if (value == 1) {
bold = true;
} else if (value == 2) {
dim = true;
} else if (value == 22) {
bold = false;
dim = false;
} else if (value == 39) {
fg = DEFAULT_FG;
} else if (value == 49) {
@@ -302,7 +309,7 @@ final class TerminalScreenBuffer {
wrapPending = false;
newLine();
}
cells[cursorRow][cursorCol].set(value, fg, bg, bold);
cells[cursorRow][cursorCol].set(value, fg, bg, bold, dim);
if (cursorCol == cols - 1) {
wrapPending = true;
} else {
@@ -453,15 +460,19 @@ final class TerminalScreenBuffer {
int fgColor = first.fg;
int bgColor = first.bg;
boolean isBold = first.bold;
boolean isDim = first.dim;
while (col < cols) {
Cell cell = cells[row][col];
if (cell.fg != fgColor || cell.bg != bgColor || cell.bold != isBold) {
if (cell.fg != fgColor || cell.bg != bgColor || cell.bold != isBold || cell.dim != isDim) {
break;
}
output.append(cell.value);
col++;
}
int end = output.length();
if (isDim) {
fgColor = blendColor(fgColor, bgColor == DEFAULT_BG ? TERMINAL_BG : bgColor, 0.55f);
}
output.setSpan(new ForegroundColorSpan(fgColor), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
if (bgColor != DEFAULT_BG) {
output.setSpan(new BackgroundColorSpan(bgColor), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
@@ -613,6 +624,15 @@ final class TerminalScreenBuffer {
return value == 0 ? 0 : 55 + value * 40;
}
private static int blendColor(int foreground, int background, float foregroundRatio) {
float backgroundRatio = 1f - foregroundRatio;
return Color.rgb(
Math.round(Color.red(foreground) * foregroundRatio + Color.red(background) * backgroundRatio),
Math.round(Color.green(foreground) * foregroundRatio + Color.green(background) * backgroundRatio),
Math.round(Color.blue(foreground) * foregroundRatio + Color.blue(background) * backgroundRatio)
);
}
private static int clamp(int value, int min, int max) {
return Math.max(min, Math.min(max, value));
}
@@ -622,19 +642,22 @@ final class TerminalScreenBuffer {
int fg = DEFAULT_FG;
int bg = DEFAULT_BG;
boolean bold;
boolean dim;
void clear() {
value = ' ';
fg = DEFAULT_FG;
bg = DEFAULT_BG;
bold = false;
dim = false;
}
void set(char nextValue, int nextFg, int nextBg, boolean nextBold) {
void set(char nextValue, int nextFg, int nextBg, boolean nextBold, boolean nextDim) {
value = nextValue;
fg = nextFg;
bg = nextBg;
bold = nextBold;
dim = nextDim;
}
void copyFrom(Cell other) {
@@ -642,6 +665,7 @@ final class TerminalScreenBuffer {
fg = other.fg;
bg = other.bg;
bold = other.bold;
dim = other.dim;
}
}
}