From 9686eda3a89da7858a127631ddc1f4ccc16851ee Mon Sep 17 00:00:00 2001
From: Will Scullin <scullin@scullin.com>
Date: Thu, 9 Jun 2022 12:22:59 -0700
Subject: [PATCH] Preact printer (#129)

---
 js/components/ControlButton.tsx            |   8 +-
 js/components/ControlStrip.tsx             |   5 +
 js/components/Printer.tsx                  | 107 +++++++++++++++++++++
 js/components/css/App.module.css           |  12 ++-
 js/components/css/ControlButton.module.css |   3 +
 js/components/css/Modal.module.css         |   7 ++
 js/components/css/Printer.module.css       |   9 ++
 7 files changed, 145 insertions(+), 6 deletions(-)
 create mode 100644 js/components/Printer.tsx
 create mode 100644 js/components/css/ControlButton.module.css
 create mode 100644 js/components/css/Printer.module.css

diff --git a/js/components/ControlButton.tsx b/js/components/ControlButton.tsx
index 35e4ce6..b3ddfd7 100644
--- a/js/components/ControlButton.tsx
+++ b/js/components/ControlButton.tsx
@@ -1,4 +1,7 @@
 import { h, JSX } from 'preact';
+import cs from 'classnames';
+
+import styles from './css/ControlButton.module.css';
 
 /**
  * Interface for ControlButton.
@@ -7,6 +10,7 @@ export interface ControlButtonProps {
     icon: string;
     title: string;
     disabled?: boolean;
+    active?: boolean;
     onClick: JSX.MouseEventHandler<HTMLButtonElement>;
 }
 
@@ -18,8 +22,8 @@ export interface ControlButtonProps {
  * @param onClick Click callback
  * @returns Control Button component
  */
-export const ControlButton = ({ icon, title, onClick, ...props }: ControlButtonProps) => (
+export const ControlButton = ({ active, icon, title, onClick, ...props }: ControlButtonProps) => (
     <button onClick={onClick} title={title} {...props} >
-        <i className={`fas fa-${icon}`}></i>
+        <i className={cs('fas', `fa-${icon}`, { [styles.active]: active })}></i>
     </button>
 );
diff --git a/js/components/ControlStrip.tsx b/js/components/ControlStrip.tsx
index e4bec17..eeea766 100644
--- a/js/components/ControlStrip.tsx
+++ b/js/components/ControlStrip.tsx
@@ -7,6 +7,7 @@ import { AudioControl } from './AudioControl';
 import { OptionsModal} from './OptionsModal';
 import { OptionsContext } from './OptionsContext';
 import { PauseControl } from './PauseControl';
+import { Printer } from './Printer';
 import { ControlButton } from './ControlButton';
 import { Apple2 as Apple2Impl } from '../apple2';
 import { JoyStick } from '../ui/joystick';
@@ -14,6 +15,7 @@ import { Screen, SCREEN_FULL_PAGE } from '../ui/screen';
 import { System } from '../ui/system';
 
 import styles from './css/ControlStrip.module.css';
+import Apple2IO from 'js/apple2io';
 
 const README = 'https://github.com/whscullin/apple2js#readme';
 
@@ -33,12 +35,14 @@ interface ControlStripProps {
  */
 export const ControlStrip = ({ apple2, e }: ControlStripProps) => {
     const [showOptions, setShowOptions] = useState(false);
+    const [io, setIO] = useState<Apple2IO>();
     const options = useContext(OptionsContext);
 
     useEffect(() => {
         if (apple2) {
             const io = apple2.getIO();
             const vm = apple2.getVideoModes();
+            setIO(io);
 
             const system = new System(io, e);
             options.addOptions(system);
@@ -85,6 +89,7 @@ export const ControlStrip = ({ apple2, e }: ControlStripProps) => {
                 <CPUMeter apple2={apple2} />
                 <PauseControl apple2={apple2} />
                 <AudioControl apple2={apple2} />
+                <Printer io={io} slot={1} />
                 <div style={{flexGrow: 1}} />
                 <ControlButton onClick={doReadme} title="About" icon="info" />
                 <ControlButton onClick={doShowOptions} title="Options (F4)" icon="cog" />
diff --git a/js/components/Printer.tsx b/js/components/Printer.tsx
new file mode 100644
index 0000000..e0594d6
--- /dev/null
+++ b/js/components/Printer.tsx
@@ -0,0 +1,107 @@
+import { h, Fragment } from 'preact';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'preact/hooks';
+import Apple2IO, { slot } from 'js/apple2io';
+import Parallel, { ParallelOptions } from 'js/cards/parallel';
+import { Modal, ModalContent, ModalFooter } from './Modal';
+
+import styles from './css/Printer.module.css';
+import { ControlButton } from './ControlButton';
+import { byte } from 'js/types';
+
+export interface PrinterProps {
+    io: Apple2IO | undefined;
+    slot: slot;
+}
+
+export const Printer = ({ io, slot }: PrinterProps) => {
+    const [isOpen, setIsOpen] = useState(false);
+    const [content, setContent] = useState('');
+    const raw = useRef(new Uint8Array(1024));
+    const rawLength = useRef(0);
+    const [href, setHref] = useState('');
+
+    const cbs = useMemo<ParallelOptions>(() => ({
+        putChar: (val: byte) => {
+            const ascii = val & 0x7f;
+            const visible = val >= 0x20;
+            const char = String.fromCharCode(ascii);
+
+            if (char === '\r') {
+                // Skip for once
+            } else if (char === '\t') {
+                // possibly not right due to tab stops
+                setContent((content) => content += '        ');
+            } else if (ascii === 0x04) {
+                setContent((content) => content = content.slice(0, -1));
+                return;
+            } else if (visible) {
+                setContent((content) => content += char);
+            }
+
+            raw.current[rawLength.current++] = val;
+            if (rawLength.current > raw.current.length) {
+                const newRaw = new Uint8Array(raw.current.length * 2);
+                newRaw.set(raw.current);
+                raw.current = newRaw;
+            }
+        }
+    }), [rawLength]);
+
+    useEffect(() => {
+        if (io) {
+            const parallel = new Parallel(cbs);
+            io.setSlot(slot, parallel);
+        }
+    }, [cbs, io, slot]);
+
+    useEffect(() => {
+        if (isOpen) {
+            const blob = new Blob(
+                [raw.current.slice(0, rawLength.current)],
+                { type: 'application/octet-stream' }
+            );
+            const href = window.URL.createObjectURL(blob);
+            setHref(href);
+        }
+    }, [isOpen]);
+
+    const onClear = useCallback(() => {
+        setContent('');
+        rawLength.current = 0;
+    }, []);
+    const onClose = useCallback(() => {
+        setIsOpen(false);
+    }, []);
+    const onOpen = useCallback(() => {
+        setIsOpen(true);
+    }, []);
+
+    return (
+        <>
+            <Modal isOpen={isOpen} onClose={onClose} title="Printer">
+                <ModalContent>
+                    <pre className={styles.printer}>
+                        {content}
+                    </pre>
+                </ModalContent>
+                <ModalFooter>
+                    <a
+                        download="raw_printer_output.bin"
+                        href={href}
+                        role="button"
+                    >
+                        Download Raw
+                    </a>
+                    <button onClick={onClear}>Clear</button>
+                    <button onClick={onClose}>OK</button>
+                </ModalFooter>
+            </Modal>
+            <ControlButton
+                icon="print"
+                title="Printer"
+                onClick={onOpen}
+                active={content.length > 0}
+            />
+        </>
+    );
+};
diff --git a/js/components/css/App.module.css b/js/components/css/App.module.css
index 4df33f7..8e96d27 100644
--- a/js/components/css/App.module.css
+++ b/js/components/css/App.module.css
@@ -9,7 +9,7 @@ body {
     background: black;
 }
 
-button {
+button, a[role="button"] {
     background: #44372C;
     color: #fff;
     padding: 2px 8px;
@@ -19,16 +19,20 @@ button {
     min-width: 75px;
 }
 
-button:hover {
+button:hover, a[role="button"]:hover {
     background-color: #55473D;
     border: 1px outset #66594E;
 }
 
-button:active {
+button:active, a[role="button"]:active  {
     background-color: #22150A;
     border: 1px outset #44372C;
 }
 
-button:focus {
+button:focus, a[role="button"]:focus  {
     outline: none;
 }
+
+a[role="button"] {
+    text-decoration: none;
+}
diff --git a/js/components/css/ControlButton.module.css b/js/components/css/ControlButton.module.css
new file mode 100644
index 0000000..b333f9b
--- /dev/null
+++ b/js/components/css/ControlButton.module.css
@@ -0,0 +1,3 @@
+.active {
+    color: #0f0;
+}
diff --git a/js/components/css/Modal.module.css b/js/components/css/Modal.module.css
index 32107a4..f287e68 100644
--- a/js/components/css/Modal.module.css
+++ b/js/components/css/Modal.module.css
@@ -35,6 +35,7 @@
     padding: 5px 11px;
     border: 1px outset #66594E;
     border-radius: 3px;
+    user-select: none;
 }
 
 .modalHeader button {
@@ -60,4 +61,10 @@
 
 .modalFooter {
     text-align: right;
+    user-select: none;
+}
+
+.modalFooter a[role="button"], .modalFooter button {
+    margin: 0 0 0 5px;
+    min-width: 75px;
 }
diff --git a/js/components/css/Printer.module.css b/js/components/css/Printer.module.css
new file mode 100644
index 0000000..1b0463e
--- /dev/null
+++ b/js/components/css/Printer.module.css
@@ -0,0 +1,9 @@
+.printer {
+    background: white;
+    font: fixed;
+    width: 60em;
+    padding: 5em;
+    height: 60vh;
+    overflow: auto;
+    border: 2px inset #f0edd0;
+}