Ritchie Cunningham
cf48324516
Refactored client-side rendering code to use a Color struct rather than raw float arrays.
134 lines
3.7 KiB
C++
134 lines
3.7 KiB
C++
#include <cstdio>
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#include <SDL3/SDL.h>
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#include <GL/glew.h>
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#include <SDL3/SDL_events.h>
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#include "terminal.h"
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#include "client_network.h"
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#include "gfx/txt_renderer.h"
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#include "gfx/types.h"
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Terminal::Terminal(ClientNetwork* network) : _network(network) {
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/* Placeholder welcome message to history. */
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_should_close = false;
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_scroll_offset = 0;
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_prompt = "";
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}
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Terminal::~Terminal(void) {}
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void Terminal::update(void) {
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}
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void Terminal::add_history(const std::string& line) {
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std::string line_with_spaces;
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for(char ch : line) {
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if(ch == '\t') {
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line_with_spaces += " ";
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} else {
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line_with_spaces += ch;
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}
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}
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_history.push_back(line_with_spaces);
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if(line == "__CLOSE_CONNECTION__") {
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_history.back() = "Connection closed by server.";
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_should_close = true;
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}
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}
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void Terminal::set_prompt(const std::string& prompt) {
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_prompt = prompt;
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}
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bool Terminal::close(void) { return _should_close; }
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void Terminal::_on_ret_press(void) {
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std::string command = _input_buffer;
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_input_buffer.clear(); /* Clear the input buffer immediately. */
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/* Add the command to history. */
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_history.push_back(_prompt + "> " + command);
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if(command == "clear") {
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_history.clear();
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return;
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}
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_network->send(command);
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/* TODO: Ugly hack. Refactor to pass window height
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* We need the window height to know if we should
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* auto-scroll, but we don't have it here.
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* Assume the height of 500 for now.
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*/
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int visible_lines = (500-5.0f)/20.0f; /* Subtract padding. */
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if((int)_history.size()+1 > visible_lines) {
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_scroll_offset = (_history.size()+1) - visible_lines+1;
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}
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}
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void Terminal::handle_input(SDL_Event* event) {
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if(event->type == SDL_EVENT_TEXT_INPUT) {
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/* Append chars to the input buffer. */
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_input_buffer += event->text.text;
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} else if(event->type == SDL_EVENT_KEY_DOWN) {
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/* Handle special keys. */
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if(event->key.key == SDLK_BACKSPACE && _input_buffer.length() > 0) {
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_input_buffer.pop_back();
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} else if(event->key.key == SDLK_RETURN) {
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_on_ret_press();
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}
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}
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}
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void Terminal::scroll(int amount, int win_content_height) {
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/* amount > 0 = scroll up. amount < 0 = scroll down. */
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_scroll_offset += amount;
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/* Lower bound: Don't scroll below the top of the history. */
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if(_scroll_offset < 0) {
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_scroll_offset = 0;
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}
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/* Upper bound: Don't scroll past the last command. */
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float line_height = 20.0f;
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int visible_lines = win_content_height / line_height;
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int max_scroll = (_history.size()+1) - visible_lines;
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if(max_scroll < 0) max_scroll = 0;
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if(_scroll_offset > max_scroll) {
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_scroll_offset = max_scroll;
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}
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}
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void Terminal::render(TextRenderer* renderer, int x, int y, int width, int height,
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bool show_cursor) {
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const Color white = { 1.0f, 1.0f, 1.0f };
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const Color green = { 0.2f, 1.0f, 0.2f };
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float line_height = 20.0f;
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float padding = 5.0f;
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/* Enable scissor test to clip rendering to the window content area. */
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glEnable(GL_SCISSOR_TEST);
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glScissor(x, y, width, height);
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/* Draw History. */
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for(size_t i = _scroll_offset; i < _history.size(); ++i) {
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float y_pos = (y+height) - padding - line_height - ((i - _scroll_offset) * line_height);
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renderer->render_text(_history[i].c_str(), x+padding, y_pos, 1.0f, white);
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}
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/* Draw current input line. */
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std::string line_to_render = _prompt + "> " + _input_buffer;
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if(show_cursor) {
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line_to_render += "_";
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}
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float prompt_y_pos = (y+height) - padding - line_height
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- ((_history.size()-_scroll_offset)*line_height);
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renderer->render_text(line_to_render.c_str(), x+padding, prompt_y_pos, 1.0f, green);
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/* Disable scissor test. */
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glDisable(GL_SCISSOR_TEST);
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}
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