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LibVT: Correct color handling
VT100's documentation says that more than one SGR (Set Graphics Rendition) parameters may be included in a single escape sequence. However, we treated those with more than 3 parameters as color sequences, so this behavior was not replicated.
This commit is contained in:
Daniel Bertalan
Andreas Kling
parent
507ace5174
commit
c1e292e5bc
Notes:
sideshowbarker
2024-07-18 17:56:44 +09:00
Author: https://github.com/BertalanD Commit: https://github.com/SerenityOS/serenity/commit/c1e292e5bca Pull-request: https://github.com/SerenityOS/serenity/pull/7213 Issue: https://github.com/SerenityOS/serenity/issues/6820 Issue: https://github.com/SerenityOS/serenity/issues/6960
@ -66,7 +66,7 @@ void Terminal::alter_mode(bool should_set, Parameters params, Intermediates inte
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dbgln("Terminal: Show Cursor escapecode received. Not needed: ignored.");
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break;
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default:
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dbgln("Terminal::alter_mode: Unimplemented private mode {}", mode);
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dbgln("Terminal::alter_mode: Unimplemented private mode {} (should_set={})", mode, should_set);
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break;
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}
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}
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@ -75,7 +75,7 @@ void Terminal::alter_mode(bool should_set, Parameters params, Intermediates inte
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switch (mode) {
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// FIXME: implement *something* for this
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default:
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dbgln("Terminal::alter_mode: Unimplemented mode {} (set={})", mode, should_set);
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dbgln("Terminal::alter_mode: Unimplemented mode {} (should_set={})", mode, should_set);
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break;
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}
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}
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@ -98,111 +98,115 @@ void Terminal::SGR(Parameters params)
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m_current_attribute.reset();
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return;
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}
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if (params.size() >= 3) {
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bool should_set = true;
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auto kind = params[1];
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u32 color = 0;
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switch (kind) {
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case 5: // 8-bit
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color = xterm_colors[params[2]];
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break;
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case 2: // 24-bit
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for (size_t i = 0; i < 3; ++i) {
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u8 component = 0;
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if (params.size() - 2 > i) {
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component = params[i + 2];
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}
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color <<= 8;
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color |= component;
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}
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break;
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default:
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should_set = false;
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break;
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}
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if (should_set) {
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if (params[0] == 38) {
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m_current_attribute.foreground_color = color;
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return;
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} else if (params[0] == 48) {
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m_current_attribute.background_color = color;
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return;
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}
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auto parse_color = [&]() -> Optional<u32> {
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if (params.size() < 2) {
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dbgln("Color code has no type");
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return {};
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}
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}
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for (auto param : params) {
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switch (param) {
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case 0:
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// Reset
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m_current_attribute.reset();
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break;
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case 1:
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m_current_attribute.flags |= Attribute::Bold;
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break;
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case 3:
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m_current_attribute.flags |= Attribute::Italic;
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break;
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case 4:
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m_current_attribute.flags |= Attribute::Underline;
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break;
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case 5:
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m_current_attribute.flags |= Attribute::Blink;
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break;
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case 7:
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m_current_attribute.flags |= Attribute::Negative;
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break;
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case 22:
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m_current_attribute.flags &= ~Attribute::Bold;
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break;
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case 23:
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m_current_attribute.flags &= ~Attribute::Italic;
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break;
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case 24:
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m_current_attribute.flags &= ~Attribute::Underline;
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break;
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case 25:
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m_current_attribute.flags &= ~Attribute::Blink;
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break;
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case 27:
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m_current_attribute.flags &= ~Attribute::Negative;
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break;
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case 30:
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case 31:
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case 32:
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case 33:
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case 34:
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case 35:
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case 36:
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case 37:
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// Foreground color
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if (m_current_attribute.flags & Attribute::Bold)
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param += 8;
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m_current_attribute.foreground_color = xterm_colors[param - 30];
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break;
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case 39:
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// reset foreground
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m_current_attribute.foreground_color = Attribute::default_foreground_color;
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break;
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case 40:
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case 41:
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case 42:
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case 43:
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case 44:
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case 45:
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case 46:
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case 47:
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// Background color
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if (m_current_attribute.flags & Attribute::Bold)
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param += 8;
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m_current_attribute.background_color = xterm_colors[param - 40];
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break;
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case 49:
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// reset background
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m_current_attribute.background_color = Attribute::default_background_color;
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break;
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u32 color = 0;
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switch (params[1]) {
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case 5: // 8-bit
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if (params.size() < 3) {
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dbgln("8-bit color code has too few parameters");
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return {};
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}
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return xterm_colors[params[2]];
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case 2: // 24-bit
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if (params.size() < 5) {
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dbgln("24-bit color code has too few parameters");
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return {};
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}
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for (size_t i = 0; i < 3; ++i) {
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color <<= 8;
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color |= params[i + 2];
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}
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return color;
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default:
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dbgln("FIXME: SGR: p: {}", param);
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dbgln("Unknown color type {}", params[1]);
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return {};
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}
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};
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if (params[0] == 38) {
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m_current_attribute.foreground_color = parse_color().value_or(m_current_attribute.foreground_color);
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} else if (params[0] == 48) {
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m_current_attribute.background_color = parse_color().value_or(m_current_attribute.background_color);
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} else {
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// A single escape sequence may set multiple parameters.
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for (auto param : params) {
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switch (param) {
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case 0:
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// Reset
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m_current_attribute.reset();
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break;
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case 1:
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m_current_attribute.flags |= Attribute::Bold;
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break;
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case 3:
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m_current_attribute.flags |= Attribute::Italic;
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break;
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case 4:
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m_current_attribute.flags |= Attribute::Underline;
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break;
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case 5:
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m_current_attribute.flags |= Attribute::Blink;
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break;
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case 7:
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m_current_attribute.flags |= Attribute::Negative;
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break;
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case 22:
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m_current_attribute.flags &= ~Attribute::Bold;
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break;
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case 23:
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m_current_attribute.flags &= ~Attribute::Italic;
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break;
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case 24:
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m_current_attribute.flags &= ~Attribute::Underline;
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break;
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case 25:
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m_current_attribute.flags &= ~Attribute::Blink;
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break;
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case 27:
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m_current_attribute.flags &= ~Attribute::Negative;
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break;
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case 30:
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case 31:
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case 32:
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case 33:
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case 34:
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case 35:
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case 36:
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case 37:
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// Foreground color
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if (m_current_attribute.flags & Attribute::Bold)
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param += 8;
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m_current_attribute.foreground_color = xterm_colors[param - 30];
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break;
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case 39:
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// reset foreground
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m_current_attribute.foreground_color = Attribute::default_foreground_color;
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break;
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case 40:
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case 41:
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case 42:
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case 43:
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case 44:
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case 45:
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case 46:
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case 47:
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// Background color
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if (m_current_attribute.flags & Attribute::Bold)
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param += 8;
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m_current_attribute.background_color = xterm_colors[param - 40];
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break;
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case 49:
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// reset background
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m_current_attribute.background_color = Attribute::default_background_color;
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break;
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default:
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dbgln("FIXME: SGR: p: {}", param);
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}
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}
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}
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}
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