Merge branch 'master' into snapping

1 files changed, 104 insertions, 0 deletions

diff --git a/src/cli/mod.rs b/src/cli/mod.rs
new file mode 100644
index 0000000..e96070f
--- /dev/null
+++ b/src/cli/mod.rs
@@ -0,0 +1,104 @@
+//! In-window Command line interface. Used for operations that are just easier than with GUI.
+//!
+//! Sometimes it is nice to have a GUI, for instance when a selection has to be made, things have to
+//! be moved etc., however for operations like saving/loading and exporting, no such thing has to be
+//! done and the GUI is really just slowing you down (at least in my opinion). For these operations,
+//! it is much better to simply have a command do that specific thing. It is also much easier to
+//! implement a new command, so features can be tested more quickly. For some things, there should
+//! still be a GUI option. With the example of saving/loading, it is much easier to find some hidden
+//! folder in a GUI, so that is definitely a consideration for the future.
+
+pub mod cmd;
+pub use self::cmd::*;
+
+use crate::colours::DEFAULT_COLOURS;
+use crate::math::Vec2;
+use crate::Editor;
+use raylib::drawing::{RaylibDraw, RaylibDrawHandle};
+use raylib::ffi::KeyboardKey;
+use raylib::RaylibHandle;
+
+/// The command line interface. Should be created only once per program instance.
+pub struct CLI {
+    text: String,
+    active: bool,
+}
+
+impl CLI {
+    /// Create a CLI for this instance
+    pub fn new() -> Self {
+        Self {
+            text: String::new(),
+            active: false,
+        }
+    }
+
+    /// Activates the CLI, which will now capture keyboard input and execute commands accordingly.
+    pub fn activate(&mut self) {
+        if !self.active {
+            self.text = ";".to_owned();
+            self.active = true;
+        }
+    }
+
+    /// Handle input for the command line and perform any commands the user may want to run.
+    pub fn update(&mut self, rl: &mut RaylibHandle, editor: &mut Editor) {
+        /* Check if the CLI is currently active. If not and it should not be activated according to
+         * keyboard input, there is nothing to do.
+         */
+        if !self.active {
+            if rl.is_key_pressed(KeyboardKey::KEY_SEMICOLON) {
+                // Don't write the keypress again.
+                rl.get_key_pressed();
+                self.activate();
+            } else {
+                return;
+            }
+        }
+
+        // The CLI is currently active. Handle input to it.
+        if let Some(key) = rl.get_key_pressed_number() {
+            self.text.push(key as u8 as char);
+        } else if rl.is_key_pressed(KeyboardKey::KEY_BACKSPACE) {
+            self.text.pop();
+        } else if rl.is_key_pressed(KeyboardKey::KEY_ESCAPE) {
+            self.text.clear();
+        }
+
+        // When the text is empty, there is also no command marker, so set as inactive and leave.
+        if self.text.is_empty() {
+            self.active = false;
+            return;
+        }
+
+        // Perform the entered command, when the enter-key is pressed.
+        if rl.is_key_pressed(KeyboardKey::KEY_ENTER) {
+            self.active = false;
+            match cmd::parse_command(&self.text[1..]) {
+                Ok(cmd) => match cmd.process(editor) {
+                    Ok(res) => self.text = format!("SUCCESS: {}", res),
+                    Err(err) => self.text = format!("ERROR: {}", err),
+                },
+                Err(err) => self.text = format!("SYNTAX ERROR: {}", err),
+            }
+        }
+    }
+
+    /// Draw the command line at the bottom of the window.
+    pub fn draw(&self, rld: &mut RaylibDrawHandle) {
+        let pos = Vec2::new(150., rld.get_screen_height() as f32 - 25.);
+
+        rld.draw_rectangle_v(
+            pos,
+            Vec2::new(rld.get_screen_width() as f32 - pos.x, 25.),
+            DEFAULT_COLOURS.cli_background,
+        );
+        rld.draw_text(
+            &self.text,
+            155,
+            rld.get_screen_height() - 22,
+            20,
+            DEFAULT_COLOURS.cli_foreground,
+        );
+    }
+}