mirror of
https://github.com/LadybirdBrowser/ladybird.git
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1179 lines
30 KiB
C++
1179 lines
30 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/StringBuilder.h>
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#include <AK/StringView.h>
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#include <LibVT/Terminal.h>
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#include <string.h>
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//#define TERMINAL_DEBUG
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namespace VT {
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Terminal::Terminal(TerminalClient& client)
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: m_client(client)
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{
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}
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Terminal::~Terminal()
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{
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}
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void Terminal::clear()
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{
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for (size_t i = 0; i < rows(); ++i)
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m_lines[i].clear(m_current_attribute);
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set_cursor(0, 0);
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}
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inline bool is_valid_parameter_character(u8 ch)
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{
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return ch >= 0x30 && ch <= 0x3f;
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}
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inline bool is_valid_intermediate_character(u8 ch)
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{
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return ch >= 0x20 && ch <= 0x2f;
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}
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inline bool is_valid_final_character(u8 ch)
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{
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return ch >= 0x40 && ch <= 0x7e;
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}
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void Terminal::alter_mode(bool should_set, bool question_param, const ParamVector& params)
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{
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int mode = 2;
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if (params.size() > 0) {
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mode = params[0];
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}
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if (!question_param) {
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switch (mode) {
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// FIXME: implement *something* for this
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default:
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unimplemented_escape();
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break;
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}
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} else {
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switch (mode) {
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case 25:
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// Hide cursor command, but doesn't need to be run (for now, because
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// we don't do inverse control codes anyways)
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if (should_set)
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dbgprintf("Terminal: Hide Cursor escapecode recieved. Not needed: ignored.\n");
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else
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dbgprintf("Terminal: Show Cursor escapecode recieved. Not needed: ignored.\n");
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break;
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default:
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break;
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}
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}
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}
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void Terminal::RM(bool question_param, const ParamVector& params)
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{
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// RM – Reset Mode
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alter_mode(true, question_param, params);
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}
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void Terminal::SM(bool question_param, const ParamVector& params)
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{
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// SM – Set Mode
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alter_mode(false, question_param, params);
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}
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void Terminal::SGR(const ParamVector& params)
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{
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// SGR – Select Graphic Rendition
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if (params.is_empty()) {
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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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}
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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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default:
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dbgprintf("FIXME: SGR: p: %u\n", param);
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}
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}
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}
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void Terminal::escape$s(const ParamVector&)
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{
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m_saved_cursor_row = m_cursor_row;
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m_saved_cursor_column = m_cursor_column;
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}
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void Terminal::escape$u(const ParamVector&)
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{
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set_cursor(m_saved_cursor_row, m_saved_cursor_column);
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}
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void Terminal::escape$t(const ParamVector& params)
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{
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if (params.size() < 1)
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return;
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dbgprintf("FIXME: escape$t: Ps: %u (param count: %d)\n", params[0], params.size());
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}
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void Terminal::DECSTBM(const ParamVector& params)
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{
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// DECSTBM – Set Top and Bottom Margins ("Scrolling Region")
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unsigned top = 1;
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unsigned bottom = m_rows;
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if (params.size() >= 1)
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top = params[0];
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if (params.size() >= 2)
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bottom = params[1];
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if ((bottom - top) < 2 || bottom > m_rows) {
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dbgprintf("Error: DECSTBM: scrolling region invalid: %u-%u\n", top, bottom);
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return;
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}
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m_scroll_region_top = top - 1;
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m_scroll_region_bottom = bottom - 1;
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set_cursor(0, 0);
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}
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void Terminal::CUP(const ParamVector& params)
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{
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// CUP – Cursor Position
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unsigned row = 1;
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unsigned col = 1;
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if (params.size() >= 1)
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row = params[0];
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if (params.size() >= 2)
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col = params[1];
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set_cursor(row - 1, col - 1);
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}
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void Terminal::HVP(const ParamVector& params)
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{
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// HVP – Horizontal and Vertical Position
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unsigned row = 1;
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unsigned col = 1;
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if (params.size() >= 1)
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row = params[0];
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if (params.size() >= 2)
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col = params[1];
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set_cursor(row - 1, col - 1);
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}
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void Terminal::CUU(const ParamVector& params)
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{
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// CUU – Cursor Up
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int num = 1;
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if (params.size() >= 1)
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num = params[0];
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if (num == 0)
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num = 1;
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int new_row = (int)m_cursor_row - num;
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if (new_row < 0)
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new_row = 0;
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set_cursor(new_row, m_cursor_column);
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}
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void Terminal::CUD(const ParamVector& params)
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{
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// CUD – Cursor Down
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int num = 1;
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if (params.size() >= 1)
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num = params[0];
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if (num == 0)
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num = 1;
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int new_row = (int)m_cursor_row + num;
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if (new_row >= m_rows)
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new_row = m_rows - 1;
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set_cursor(new_row, m_cursor_column);
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}
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void Terminal::CUF(const ParamVector& params)
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{
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// CUF – Cursor Forward
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int num = 1;
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if (params.size() >= 1)
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num = params[0];
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if (num == 0)
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num = 1;
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int new_column = (int)m_cursor_column + num;
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if (new_column >= m_columns)
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new_column = m_columns - 1;
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set_cursor(m_cursor_row, new_column);
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}
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void Terminal::CUB(const ParamVector& params)
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{
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// CUB – Cursor Backward
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int num = 1;
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if (params.size() >= 1)
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num = params[0];
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if (num == 0)
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num = 1;
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int new_column = (int)m_cursor_column - num;
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if (new_column < 0)
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new_column = 0;
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set_cursor(m_cursor_row, new_column);
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}
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void Terminal::escape$G(const ParamVector& params)
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{
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int new_column = 1;
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if (params.size() >= 1)
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new_column = params[0] - 1;
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if (new_column < 0)
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new_column = 0;
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set_cursor(m_cursor_row, new_column);
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}
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void Terminal::escape$b(const ParamVector& params)
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{
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if (params.size() < 1)
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return;
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for (unsigned i = 0; i < params[0]; ++i)
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put_character_at(m_cursor_row, m_cursor_column++, m_last_codepoint);
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}
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void Terminal::escape$d(const ParamVector& params)
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{
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int new_row = 1;
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if (params.size() >= 1)
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new_row = params[0] - 1;
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if (new_row < 0)
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new_row = 0;
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set_cursor(new_row, m_cursor_column);
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}
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void Terminal::escape$X(const ParamVector& params)
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{
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// Erase characters (without moving cursor)
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int num = 1;
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if (params.size() >= 1)
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num = params[0];
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if (num == 0)
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num = 1;
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// Clear from cursor to end of line.
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for (int i = m_cursor_column; i < num; ++i) {
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put_character_at(m_cursor_row, i, ' ');
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}
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}
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void Terminal::EL(const ParamVector& params)
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{
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int mode = 0;
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if (params.size() >= 1)
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mode = params[0];
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switch (mode) {
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case 0:
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// Clear from cursor to end of line.
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for (int i = m_cursor_column; i < m_columns; ++i) {
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put_character_at(m_cursor_row, i, ' ');
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}
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break;
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case 1:
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// Clear from cursor to beginning of line.
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for (int i = 0; i <= m_cursor_column; ++i) {
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put_character_at(m_cursor_row, i, ' ');
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}
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break;
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case 2:
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// Clear the complete line
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for (int i = 0; i < m_columns; ++i) {
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put_character_at(m_cursor_row, i, ' ');
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}
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break;
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default:
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unimplemented_escape();
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break;
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}
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}
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void Terminal::ED(const ParamVector& params)
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{
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// ED - Erase in Display
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int mode = 0;
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if (params.size() >= 1)
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mode = params[0];
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switch (mode) {
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case 0:
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// Clear from cursor to end of screen.
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for (int i = m_cursor_column; i < m_columns; ++i)
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put_character_at(m_cursor_row, i, ' ');
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for (int row = m_cursor_row + 1; row < m_rows; ++row) {
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for (int column = 0; column < m_columns; ++column) {
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put_character_at(row, column, ' ');
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}
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}
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break;
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case 1:
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// Clear from cursor to beginning of screen.
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for (int i = m_cursor_column; i >= 0; --i)
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put_character_at(m_cursor_row, i, ' ');
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for (int row = m_cursor_row - 1; row >= 0; --row) {
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for (int column = 0; column < m_columns; ++column) {
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put_character_at(row, column, ' ');
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}
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}
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break;
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case 2:
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clear();
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break;
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case 3:
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// FIXME: <esc>[3J should also clear the scrollback buffer.
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clear();
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break;
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default:
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unimplemented_escape();
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break;
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}
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}
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void Terminal::escape$S(const ParamVector& params)
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{
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int count = 1;
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if (params.size() >= 1)
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count = params[0];
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for (u16 i = 0; i < count; i++)
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scroll_up();
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}
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void Terminal::escape$T(const ParamVector& params)
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{
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int count = 1;
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if (params.size() >= 1)
|
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count = params[0];
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for (u16 i = 0; i < count; i++)
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scroll_down();
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}
|
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void Terminal::escape$L(const ParamVector& params)
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{
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int count = 1;
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if (params.size() >= 1)
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count = params[0];
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invalidate_cursor();
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for (; count > 0; --count) {
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m_lines.insert(m_cursor_row + m_scroll_region_top, make<Line>(m_columns));
|
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if (m_scroll_region_bottom + 1 < m_lines.size())
|
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m_lines.remove(m_scroll_region_bottom + 1);
|
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else
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m_lines.remove(m_lines.size() - 1);
|
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}
|
||
|
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m_need_full_flush = true;
|
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}
|
||
|
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void Terminal::DA(const ParamVector&)
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{
|
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// DA - Device Attributes
|
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emit_string("\033[?1;0c");
|
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}
|
||
|
||
void Terminal::escape$M(const ParamVector& params)
|
||
{
|
||
int count = 1;
|
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if (params.size() >= 1)
|
||
count = params[0];
|
||
|
||
if (count == 1 && m_cursor_row == 0) {
|
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scroll_up();
|
||
return;
|
||
}
|
||
|
||
int max_count = m_rows - (m_scroll_region_top + m_cursor_row);
|
||
count = min(count, max_count);
|
||
|
||
for (int c = count; c > 0; --c) {
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||
m_lines.remove(m_cursor_row + m_scroll_region_top);
|
||
if (m_scroll_region_bottom < m_lines.size())
|
||
m_lines.insert(m_scroll_region_bottom, make<Line>(m_columns));
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||
else
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||
m_lines.append(make<Line>(m_columns));
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}
|
||
}
|
||
|
||
void Terminal::escape$P(const ParamVector& params)
|
||
{
|
||
int num = 1;
|
||
if (params.size() >= 1)
|
||
num = params[0];
|
||
|
||
if (num == 0)
|
||
num = 1;
|
||
|
||
auto& line = m_lines[m_cursor_row];
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||
|
||
// Move n characters of line to the left
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||
for (int i = m_cursor_column; i < line.length() - num; i++)
|
||
line.set_codepoint(i, line.codepoint(i + num));
|
||
|
||
// Fill remainder of line with blanks
|
||
for (int i = line.length() - num; i < line.length(); i++)
|
||
line.set_codepoint(i, ' ');
|
||
|
||
line.set_dirty(true);
|
||
}
|
||
|
||
void Terminal::execute_xterm_command()
|
||
{
|
||
ParamVector numeric_params;
|
||
auto param_string = String::copy(m_xterm_parameters);
|
||
auto params = param_string.split(';', true);
|
||
m_xterm_parameters.clear_with_capacity();
|
||
for (auto& parampart : params)
|
||
numeric_params.append(parampart.to_uint().value_or(0));
|
||
|
||
while (params.size() < 3) {
|
||
params.append(String::empty());
|
||
numeric_params.append(0);
|
||
}
|
||
|
||
m_final = '@';
|
||
|
||
if (numeric_params.is_empty()) {
|
||
dbg() << "Empty Xterm params?";
|
||
return;
|
||
}
|
||
|
||
switch (numeric_params[0]) {
|
||
case 0:
|
||
case 1:
|
||
case 2:
|
||
m_client.set_window_title(params[1]);
|
||
break;
|
||
case 8:
|
||
m_current_attribute.href = params[2];
|
||
// FIXME: Respect the provided ID
|
||
m_current_attribute.href_id = String::format("%u", m_next_href_id++);
|
||
break;
|
||
case 9:
|
||
m_client.set_window_progress(numeric_params[1], numeric_params[2]);
|
||
break;
|
||
default:
|
||
unimplemented_xterm_escape();
|
||
break;
|
||
}
|
||
}
|
||
|
||
void Terminal::execute_escape_sequence(u8 final)
|
||
{
|
||
bool question_param = false;
|
||
m_final = final;
|
||
ParamVector params;
|
||
|
||
if (m_parameters.size() > 0 && m_parameters[0] == '?') {
|
||
question_param = true;
|
||
m_parameters.remove(0);
|
||
}
|
||
auto paramparts = String::copy(m_parameters).split(';');
|
||
for (auto& parampart : paramparts) {
|
||
auto value = parampart.to_uint();
|
||
if (!value.has_value()) {
|
||
// FIXME: Should we do something else?
|
||
m_parameters.clear_with_capacity();
|
||
m_intermediates.clear_with_capacity();
|
||
return;
|
||
}
|
||
params.append(value.value());
|
||
}
|
||
|
||
#if defined(TERMINAL_DEBUG)
|
||
dbgprintf("Terminal::execute_escape_sequence: Handled final '%c'\n", final);
|
||
dbgprintf("Params: ");
|
||
for (auto& p : params) {
|
||
dbgprintf("%d ", p);
|
||
}
|
||
dbgprintf("\b\n");
|
||
#endif
|
||
|
||
switch (final) {
|
||
case 'A':
|
||
CUU(params);
|
||
break;
|
||
case 'B':
|
||
CUD(params);
|
||
break;
|
||
case 'C':
|
||
CUF(params);
|
||
break;
|
||
case 'D':
|
||
CUB(params);
|
||
break;
|
||
case 'H':
|
||
CUP(params);
|
||
break;
|
||
case 'J':
|
||
ED(params);
|
||
break;
|
||
case 'K':
|
||
EL(params);
|
||
break;
|
||
case 'M':
|
||
escape$M(params);
|
||
break;
|
||
case 'P':
|
||
escape$P(params);
|
||
break;
|
||
case 'S':
|
||
escape$S(params);
|
||
break;
|
||
case 'T':
|
||
escape$T(params);
|
||
break;
|
||
case 'L':
|
||
escape$L(params);
|
||
break;
|
||
case 'G':
|
||
escape$G(params);
|
||
break;
|
||
case 'X':
|
||
escape$X(params);
|
||
break;
|
||
case 'b':
|
||
escape$b(params);
|
||
break;
|
||
case 'd':
|
||
escape$d(params);
|
||
break;
|
||
case 'm':
|
||
SGR(params);
|
||
break;
|
||
case 's':
|
||
escape$s(params);
|
||
break;
|
||
case 'u':
|
||
escape$u(params);
|
||
break;
|
||
case 't':
|
||
escape$t(params);
|
||
break;
|
||
case 'r':
|
||
DECSTBM(params);
|
||
break;
|
||
case 'l':
|
||
RM(question_param, params);
|
||
break;
|
||
case 'h':
|
||
SM(question_param, params);
|
||
break;
|
||
case 'c':
|
||
DA(params);
|
||
break;
|
||
case 'f':
|
||
HVP(params);
|
||
break;
|
||
case 'n':
|
||
DSR(params);
|
||
break;
|
||
default:
|
||
dbgprintf("Terminal::execute_escape_sequence: Unhandled final '%c'\n", final);
|
||
break;
|
||
}
|
||
|
||
#if defined(TERMINAL_DEBUG)
|
||
dbgprintf("\n");
|
||
for (auto& line : m_lines) {
|
||
dbgprintf("Terminal: Line: ");
|
||
for (int i = 0; i < line.m_length; i++) {
|
||
dbgprintf("%c", line.characters[i]);
|
||
}
|
||
dbgprintf("\n");
|
||
}
|
||
#endif
|
||
|
||
m_parameters.clear_with_capacity();
|
||
m_intermediates.clear_with_capacity();
|
||
}
|
||
|
||
void Terminal::newline()
|
||
{
|
||
u16 new_row = m_cursor_row;
|
||
if (m_cursor_row == m_scroll_region_bottom) {
|
||
scroll_up();
|
||
} else {
|
||
++new_row;
|
||
}
|
||
set_cursor(new_row, 0);
|
||
}
|
||
|
||
void Terminal::scroll_up()
|
||
{
|
||
// NOTE: We have to invalidate the cursor first.
|
||
invalidate_cursor();
|
||
if (m_scroll_region_top == 0) {
|
||
auto line = move(m_lines.ptr_at(m_scroll_region_top));
|
||
m_history.append(move(line));
|
||
while (m_history.size() > max_history_size())
|
||
m_history.take_first();
|
||
m_client.terminal_history_changed();
|
||
}
|
||
m_lines.remove(m_scroll_region_top);
|
||
m_lines.insert(m_scroll_region_bottom, make<Line>(m_columns));
|
||
m_need_full_flush = true;
|
||
}
|
||
|
||
void Terminal::scroll_down()
|
||
{
|
||
// NOTE: We have to invalidate the cursor first.
|
||
invalidate_cursor();
|
||
m_lines.remove(m_scroll_region_bottom);
|
||
m_lines.insert(m_scroll_region_top, make<Line>(m_columns));
|
||
m_need_full_flush = true;
|
||
}
|
||
|
||
void Terminal::set_cursor(unsigned a_row, unsigned a_column)
|
||
{
|
||
unsigned row = min(a_row, m_rows - 1u);
|
||
unsigned column = min(a_column, m_columns - 1u);
|
||
if (row == m_cursor_row && column == m_cursor_column)
|
||
return;
|
||
ASSERT(row < rows());
|
||
ASSERT(column < columns());
|
||
invalidate_cursor();
|
||
m_cursor_row = row;
|
||
m_cursor_column = column;
|
||
m_stomp = false;
|
||
invalidate_cursor();
|
||
}
|
||
|
||
void Terminal::put_character_at(unsigned row, unsigned column, u32 codepoint)
|
||
{
|
||
ASSERT(row < rows());
|
||
ASSERT(column < columns());
|
||
auto& line = m_lines[row];
|
||
line.set_codepoint(column, codepoint);
|
||
line.attributes()[column] = m_current_attribute;
|
||
line.attributes()[column].flags |= Attribute::Touched;
|
||
line.set_dirty(true);
|
||
|
||
m_last_codepoint = codepoint;
|
||
}
|
||
|
||
void Terminal::NEL()
|
||
{
|
||
// NEL - Next Line
|
||
newline();
|
||
}
|
||
|
||
void Terminal::IND()
|
||
{
|
||
// IND - Index (move down)
|
||
CUD({});
|
||
}
|
||
|
||
void Terminal::RI()
|
||
{
|
||
// RI - Reverse Index (move up)
|
||
CUU({});
|
||
}
|
||
|
||
void Terminal::DSR(const ParamVector& params)
|
||
{
|
||
if (params.size() == 1 && params[0] == 5) {
|
||
// Device status
|
||
emit_string("\033[0n"); // Terminal status OK!
|
||
} else if (params.size() == 1 && params[0] == 6) {
|
||
// Cursor position query
|
||
emit_string(String::format("\033[%d;%dR", m_cursor_row + 1, m_cursor_column + 1));
|
||
} else {
|
||
dbg() << "Unknown DSR";
|
||
}
|
||
}
|
||
|
||
void Terminal::on_input(u8 ch)
|
||
{
|
||
#ifdef TERMINAL_DEBUG
|
||
dbgprintf("Terminal::on_char: %b (%c), fg=%u, bg=%u\n", ch, ch, m_current_attribute.foreground_color, m_current_attribute.background_color);
|
||
#endif
|
||
|
||
auto fail_utf8_parse = [this] {
|
||
m_parser_state = Normal;
|
||
on_codepoint('%');
|
||
};
|
||
|
||
auto advance_utf8_parse = [this, ch] {
|
||
m_parser_codepoint <<= 6;
|
||
m_parser_codepoint |= ch & 0x3f;
|
||
if (m_parser_state == UTF8Needs1Byte) {
|
||
on_codepoint(m_parser_codepoint);
|
||
m_parser_state = Normal;
|
||
} else {
|
||
m_parser_state = (ParserState)(m_parser_state + 1);
|
||
}
|
||
};
|
||
|
||
switch (m_parser_state) {
|
||
case GotEscape:
|
||
if (ch == '[') {
|
||
m_parser_state = ExpectParameter;
|
||
} else if (ch == '(') {
|
||
m_swallow_current = true;
|
||
m_parser_state = ExpectParameter;
|
||
} else if (ch == ']') {
|
||
m_parser_state = ExpectXtermParameter;
|
||
m_xterm_parameters.clear_with_capacity();
|
||
} else if (ch == '#') {
|
||
m_parser_state = ExpectHashtagDigit;
|
||
} else if (ch == 'D') {
|
||
IND();
|
||
m_parser_state = Normal;
|
||
return;
|
||
} else if (ch == 'M') {
|
||
RI();
|
||
m_parser_state = Normal;
|
||
return;
|
||
} else if (ch == 'E') {
|
||
NEL();
|
||
m_parser_state = Normal;
|
||
return;
|
||
} else {
|
||
dbg() << "Unexpected character in GotEscape '" << (char)ch << "'";
|
||
m_parser_state = Normal;
|
||
}
|
||
return;
|
||
case ExpectHashtagDigit:
|
||
if (ch >= '0' && ch <= '9') {
|
||
execute_hashtag(ch);
|
||
m_parser_state = Normal;
|
||
}
|
||
return;
|
||
case ExpectXtermParameter:
|
||
if (ch == 27) {
|
||
m_parser_state = ExpectStringTerminator;
|
||
return;
|
||
}
|
||
if (ch == 7) {
|
||
execute_xterm_command();
|
||
m_parser_state = Normal;
|
||
return;
|
||
}
|
||
m_xterm_parameters.append(ch);
|
||
return;
|
||
case ExpectStringTerminator:
|
||
if (ch == '\\')
|
||
execute_xterm_command();
|
||
else
|
||
dbg() << "Unexpected string terminator: " << String::format("%02x", ch);
|
||
m_parser_state = Normal;
|
||
return;
|
||
case ExpectParameter:
|
||
if (is_valid_parameter_character(ch)) {
|
||
m_parameters.append(ch);
|
||
return;
|
||
}
|
||
m_parser_state = ExpectIntermediate;
|
||
[[fallthrough]];
|
||
case ExpectIntermediate:
|
||
if (is_valid_intermediate_character(ch)) {
|
||
m_intermediates.append(ch);
|
||
return;
|
||
}
|
||
m_parser_state = ExpectFinal;
|
||
[[fallthrough]];
|
||
case ExpectFinal:
|
||
if (is_valid_final_character(ch)) {
|
||
m_parser_state = Normal;
|
||
if (!m_swallow_current)
|
||
execute_escape_sequence(ch);
|
||
m_swallow_current = false;
|
||
return;
|
||
}
|
||
m_parser_state = Normal;
|
||
m_swallow_current = false;
|
||
return;
|
||
case UTF8Needs1Byte:
|
||
case UTF8Needs2Bytes:
|
||
case UTF8Needs3Bytes:
|
||
if ((ch & 0xc0) != 0x80) {
|
||
fail_utf8_parse();
|
||
} else {
|
||
advance_utf8_parse();
|
||
}
|
||
return;
|
||
|
||
case Normal:
|
||
if (!(ch & 0x80))
|
||
break;
|
||
if ((ch & 0xe0) == 0xc0) {
|
||
m_parser_state = UTF8Needs1Byte;
|
||
m_parser_codepoint = ch & 0x1f;
|
||
return;
|
||
}
|
||
if ((ch & 0xf0) == 0xe0) {
|
||
m_parser_state = UTF8Needs2Bytes;
|
||
m_parser_codepoint = ch & 0x0f;
|
||
return;
|
||
}
|
||
if ((ch & 0xf8) == 0xf0) {
|
||
m_parser_state = UTF8Needs3Bytes;
|
||
m_parser_codepoint = ch & 0x07;
|
||
return;
|
||
}
|
||
fail_utf8_parse();
|
||
return;
|
||
}
|
||
|
||
switch (ch) {
|
||
case '\0':
|
||
return;
|
||
case '\033':
|
||
m_parser_state = GotEscape;
|
||
m_swallow_current = false;
|
||
return;
|
||
case 8: // Backspace
|
||
if (m_cursor_column) {
|
||
set_cursor(m_cursor_row, m_cursor_column - 1);
|
||
return;
|
||
}
|
||
return;
|
||
case '\a':
|
||
m_client.beep();
|
||
return;
|
||
case '\t': {
|
||
for (unsigned i = m_cursor_column + 1; i < columns(); ++i) {
|
||
if (m_horizontal_tabs[i]) {
|
||
set_cursor(m_cursor_row, i);
|
||
return;
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
case '\r':
|
||
set_cursor(m_cursor_row, 0);
|
||
return;
|
||
case '\n':
|
||
newline();
|
||
return;
|
||
}
|
||
|
||
on_codepoint(ch);
|
||
}
|
||
|
||
void Terminal::on_codepoint(u32 codepoint)
|
||
{
|
||
auto new_column = m_cursor_column + 1;
|
||
if (new_column < columns()) {
|
||
put_character_at(m_cursor_row, m_cursor_column, codepoint);
|
||
set_cursor(m_cursor_row, new_column);
|
||
return;
|
||
}
|
||
if (m_stomp) {
|
||
m_stomp = false;
|
||
newline();
|
||
put_character_at(m_cursor_row, m_cursor_column, codepoint);
|
||
set_cursor(m_cursor_row, 1);
|
||
} else {
|
||
// Curious: We wait once on the right-hand side
|
||
m_stomp = true;
|
||
put_character_at(m_cursor_row, m_cursor_column, codepoint);
|
||
}
|
||
}
|
||
|
||
void Terminal::inject_string(const StringView& str)
|
||
{
|
||
for (size_t i = 0; i < str.length(); ++i)
|
||
on_input(str[i]);
|
||
}
|
||
|
||
void Terminal::emit_string(const StringView& string)
|
||
{
|
||
m_client.emit((const u8*)string.characters_without_null_termination(), string.length());
|
||
}
|
||
|
||
void Terminal::handle_key_press(KeyCode key, u32 code_point, u8 flags)
|
||
{
|
||
bool ctrl = flags & Mod_Ctrl;
|
||
bool alt = flags & Mod_Alt;
|
||
bool shift = flags & Mod_Shift;
|
||
|
||
switch (key) {
|
||
case KeyCode::Key_Up:
|
||
emit_string(ctrl ? "\033[OA" : "\033[A");
|
||
return;
|
||
case KeyCode::Key_Down:
|
||
emit_string(ctrl ? "\033[OB" : "\033[B");
|
||
return;
|
||
case KeyCode::Key_Right:
|
||
emit_string(ctrl ? "\033[OC" : "\033[C");
|
||
return;
|
||
case KeyCode::Key_Left:
|
||
emit_string(ctrl ? "\033[OD" : "\033[D");
|
||
return;
|
||
case KeyCode::Key_Insert:
|
||
emit_string("\033[2~");
|
||
return;
|
||
case KeyCode::Key_Delete:
|
||
emit_string("\033[3~");
|
||
return;
|
||
case KeyCode::Key_Home:
|
||
emit_string("\033[H");
|
||
return;
|
||
case KeyCode::Key_End:
|
||
emit_string("\033[F");
|
||
return;
|
||
case KeyCode::Key_PageUp:
|
||
emit_string("\033[5~");
|
||
return;
|
||
case KeyCode::Key_PageDown:
|
||
emit_string("\033[6~");
|
||
return;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (!code_point) {
|
||
// Probably a modifier being pressed.
|
||
return;
|
||
}
|
||
|
||
if (shift && key == KeyCode::Key_Tab) {
|
||
emit_string("\033[Z");
|
||
return;
|
||
}
|
||
|
||
// Key event was not one of the above special cases,
|
||
// attempt to treat it as a character...
|
||
if (ctrl) {
|
||
if (code_point >= 'a' && code_point <= 'z') {
|
||
code_point = code_point - 'a' + 1;
|
||
} else if (code_point == '\\') {
|
||
code_point = 0x1c;
|
||
}
|
||
}
|
||
|
||
// Alt modifier sends escape prefix.
|
||
if (alt)
|
||
emit_string("\033");
|
||
|
||
StringBuilder sb;
|
||
sb.append_codepoint(code_point);
|
||
|
||
emit_string(sb.to_string());
|
||
}
|
||
|
||
void Terminal::unimplemented_escape()
|
||
{
|
||
StringBuilder builder;
|
||
builder.appendf("((Unimplemented escape: %c", m_final);
|
||
if (!m_parameters.is_empty()) {
|
||
builder.append(" parameters:");
|
||
for (size_t i = 0; i < m_parameters.size(); ++i)
|
||
builder.append((char)m_parameters[i]);
|
||
}
|
||
if (!m_intermediates.is_empty()) {
|
||
builder.append(" intermediates:");
|
||
for (size_t i = 0; i < m_intermediates.size(); ++i)
|
||
builder.append((char)m_intermediates[i]);
|
||
}
|
||
builder.append("))");
|
||
inject_string(builder.to_string());
|
||
}
|
||
|
||
void Terminal::unimplemented_xterm_escape()
|
||
{
|
||
auto message = String::format("((Unimplemented xterm escape: %c))\n", m_final);
|
||
inject_string(message);
|
||
}
|
||
|
||
void Terminal::set_size(u16 columns, u16 rows)
|
||
{
|
||
if (!columns)
|
||
columns = 1;
|
||
if (!rows)
|
||
rows = 1;
|
||
|
||
if (columns == m_columns && rows == m_rows)
|
||
return;
|
||
|
||
#if defined(TERMINAL_DEBUG)
|
||
dbgprintf("Terminal: RESIZE to: %d rows\n", rows);
|
||
#endif
|
||
|
||
if (rows > m_rows) {
|
||
while (m_lines.size() < rows)
|
||
m_lines.append(make<Line>(columns));
|
||
} else {
|
||
m_lines.shrink(rows);
|
||
}
|
||
|
||
for (int i = 0; i < rows; ++i)
|
||
m_lines[i].set_length(columns);
|
||
|
||
m_columns = columns;
|
||
m_rows = rows;
|
||
|
||
m_scroll_region_top = 0;
|
||
m_scroll_region_bottom = rows - 1;
|
||
|
||
m_cursor_row = min((int)m_cursor_row, m_rows - 1);
|
||
m_cursor_column = min((int)m_cursor_column, m_columns - 1);
|
||
m_saved_cursor_row = min((int)m_saved_cursor_row, m_rows - 1);
|
||
m_saved_cursor_column = min((int)m_saved_cursor_column, m_columns - 1);
|
||
|
||
m_horizontal_tabs.resize(columns);
|
||
for (unsigned i = 0; i < columns; ++i)
|
||
m_horizontal_tabs[i] = (i % 8) == 0;
|
||
// Rightmost column is always last tab on line.
|
||
m_horizontal_tabs[columns - 1] = 1;
|
||
|
||
m_client.terminal_did_resize(m_columns, m_rows);
|
||
}
|
||
|
||
void Terminal::invalidate_cursor()
|
||
{
|
||
m_lines[m_cursor_row].set_dirty(true);
|
||
}
|
||
|
||
void Terminal::execute_hashtag(u8 hashtag)
|
||
{
|
||
switch (hashtag) {
|
||
case '8':
|
||
// Confidence Test - Fill screen with E's
|
||
for (size_t row = 0; row < m_rows; ++row) {
|
||
for (size_t column = 0; column < m_columns; ++column) {
|
||
put_character_at(row, column, 'E');
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
dbg() << "Unknown hashtag: '" << hashtag << "'";
|
||
}
|
||
}
|
||
|
||
Attribute Terminal::attribute_at(const Position& position) const
|
||
{
|
||
if (!position.is_valid())
|
||
return {};
|
||
if (position.row() >= static_cast<int>(line_count()))
|
||
return {};
|
||
auto& line = this->line(position.row());
|
||
if (position.column() >= line.length())
|
||
return {};
|
||
return line.attributes()[position.column()];
|
||
}
|
||
|
||
}
|