mirror of
https://github.com/curioustorvald/tsvm.git
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537 lines
21 KiB
JavaScript
537 lines
21 KiB
JavaScript
/**
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* WinTex — TUI window management and renderer
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* @author CuriousTorvald
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*/
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class WindowObject {
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constructor(x, y, w, h, inputProcessor, drawContents, title, drawFrame) {
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this.isHighlighted = false
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this.x = x|0
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this.y = y|0
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this.width = w|0
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this.height = h|0
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this.inputProcessorFun = inputProcessor
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this.drawContentsFun = drawContents
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this.title = title
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this.titleLeft = undefined
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this.titleRight = undefined
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this.titleBack = 0 // default value
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this.titleBackLeft = 245 // default value
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this.titleBackRight = 245 // default value
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this.drawFrameFun = drawFrame || (() => {
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let oldFore = con.get_color_fore()
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let oldBack = con.get_color_back()
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let charset = (this.isHighlighted) ? [0xC9, 0xBB, 0xC8, 0xBC, 0xCD, 0xBA, 0xB5, 0xC6] : [0xDA, 0xBF, 0xC0, 0xD9, 0xC4, 0xB3, 0xB4, 0xC3]
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let colour = (this.isHighlighted) ? 230 : 253
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let colourText = (this.isHighlighted) ? 230 : 254
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// set fore colour
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print(`\x1B[38;5;${colour}m`)
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// draw top horz
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con.mvaddch(this.y, this.x, charset[0]); con.curs_right()
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print(`\x84${charset[4]}u`.repeat(this.width - 2))
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con.addch(charset[1])
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// draw vert
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for (let yp = this.y + 1; yp < this.y + this.height - 1; yp++) {
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con.mvaddch(yp, this.x , charset[5])
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con.mvaddch(yp, this.x + this.width - 1, charset[5])
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}
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// draw bottom horz
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con.mvaddch(this.y + this.height - 1, this.x, charset[2]); con.curs_right()
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print(`\x84${charset[4]}u`.repeat(this.width - 2))
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con.addch(charset[3])
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// draw title
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if (this.title !== undefined) {
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let tt = ''+this.title
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con.move(this.y, this.x + ((this.width - 2 - tt.length) >>> 1))
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if (this.titleBack !== undefined) print(`\x1B[48;5;${this.titleBack}m`)
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print(`\x84${charset[6]}u`)
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print(`\x1B[38;5;${colourText}m${tt}`)
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print(`\x1B[38;5;${colour}m\x84${charset[7]}u`)
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if (this.titleBack !== undefined) print(`\x1B[48;5;${oldBack}m`)
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}
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if (this.titleLeft !== undefined) {
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let tt = ''+this.titleLeft
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con.move(this.y, this.x)
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print(`\x84${charset[0]}u`)
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if (this.titleBackLeft !== undefined) print(`\x1B[48;5;${this.titleBackLeft}m`)
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print(`\x1B[38;5;${colourText}m`);print(tt)
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if (this.titleBackLeft !== undefined) print(`\x1B[48;5;${oldBack}m`)
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print(`\x1B[38;5;${colour}m`);print(`\x84${charset[4]}u`)
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}
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if (this.titleRight !== undefined) {
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let tt = ''+this.titleRight
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con.move(this.y + this.height - 1, this.x + this.width - tt.length - 2)
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print(`\x84${charset[4]}u`)
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if (this.titleBackRight !== undefined) print(`\x1B[48;5;${this.titleBackRight}m`)
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print(`\x1B[38;5;${colourText}m${tt}`)
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if (this.titleBackRight !== undefined) print(`\x1B[48;5;${oldBack}m`)
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print(`\x1B[38;5;${colour}m\x84${charset[3]}u`)
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}
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// restore fore colour
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print(`\x1B[38;5;${oldFore}m`)
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print(`\x1B[48;5;${oldBack}m`)
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})
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}
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drawContents() { this.drawContentsFun(this) }
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drawFrame() { this.drawFrameFun(this) }
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processInput(event) { this.inputProcessorFun(this, event) }
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}
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/**
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* @param dy cursor change (positive or negative)
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* @param listSize size of the list to scroll
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* @param listHeight size of the list window
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* @param currentCursorPos ABSOLUTE position of the cursor
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* @param currentScrollPos current scroll position of the list
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* @param scrollPeek size of the scroll "peek"
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* @return [new cursor pos, new scroll pos]
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*/
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function scrollVert(dy, listSize, listHeight, currentCursorPos, currentScrollPos, scrollPeek) {
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// clamp dy
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if (currentCursorPos + dy > listSize - 1)
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dy = (listSize - 1) - currentCursorPos
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else if (currentCursorPos + dy < 0)
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dy = -currentCursorPos
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let nextRow = currentCursorPos + dy
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// update vertical scroll stats
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if (dy != 0) {
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let visible = listHeight - 1 - scrollPeek
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if (nextRow - currentScrollPos > visible) {
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currentScrollPos = nextRow - visible
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}
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else if (nextRow - currentScrollPos < 0 + scrollPeek) {
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currentScrollPos = nextRow - scrollPeek // nextRow is less than zero
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}
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// NOTE: future-proofing here -- scroll clamping is moved outside of go-up/go-down
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// if-statements above because horizontal movements can disrupt vertical scrolls as well because
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// "normally" when you go right at the end of the line, you appear at the start of the next line
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// scroll to the bottom?
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if (listSize > listHeight && currentScrollPos > listSize - listHeight)
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// to make sure not show buncha empty lines
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currentScrollPos = listSize - listHeight
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// scroll to the top? (order is important!)
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if (currentScrollPos <= -1)
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currentScrollPos = 0 // scroll of -1 would result to show "Line 0" on screen
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}
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// move editor cursor
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currentCursorPos = nextRow
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return [currentCursorPos, currentScrollPos]
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}
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/**
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* @param dx cursor change (positive or negative)
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* @param stringSize length of the string to scroll
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* @param stringViewSize size of the string view
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* @param currentCursorPos ABSOLUTE position of the cursor
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* @param currentScrollPos current scroll position of the list
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* @param scrollPeek size of the scroll "peek"
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* @return [new cursor pos, new scroll pos]
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*/
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function scrollHorz(dx, stringSize, stringViewSize, currentCursorPos, currentScrollPos, scrollPeek) {
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// clamp dx
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if (currentCursorPos + dx > stringSize - 1)
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dx = (stringSize - 1) - currentCursorPos
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else if (currentCursorPos + dx < 0)
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dx = -currentCursorPos
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let nextCol = currentCursorPos + dx
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// update vertical scroll stats
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if (dx != 0) {
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let visible = stringViewSize - 1 - scrollPeek
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if (nextCol - currentScrollPos > visible) {
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currentScrollPos = nextCol - visible
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}
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else if (nextCol - currentScrollPos < 0 + scrollPeek) {
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currentScrollPos = nextCol - scrollPeek // nextCol is less than zero
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}
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// NOTE: future-proofing here -- scroll clamping is moved outside of go-up/go-down
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// if-statements above because horizontal movements can disrupt vertical scrolls as well because
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// "normally" when you go right at the end of the line, you appear at the start of the next line
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// scroll to the bottom?
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if (stringSize > stringViewSize && currentScrollPos > stringSize - stringViewSize)
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// to make sure not show buncha empty lines
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currentScrollPos = stringSize - stringViewSize
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// scroll to the top? (order is important!)
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if (currentScrollPos <= -1)
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currentScrollPos = 0 // scroll of -1 would result to show "Line 0" on screen
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}
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// move editor cursor
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currentCursorPos = nextCol
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return [currentCursorPos, currentScrollPos]
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}
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// ---------------------------------------------------------------------------
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// Modal dialog with multiple input fields and OK/Cancel-style buttons.
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//
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// opts = {
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// title: string,
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// message: string | string[]? -- optional body text drawn above fields
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// fields: [{label, initial?, width}, ...] -- omit / [] for no input field. Label does NOT get auto-colon
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// buttons: [{label, action, default?}, ...] -- defaults to [OK, Cancel] (+ Delete
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// if `allowDelete:true`)
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// allowDelete: bool, -- inserts a Delete button (fsh compat)
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// colours: {fg?, bg?, fieldBg?, dimFg?, hlFg?, focusBg?} -- per-call overrides
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// }
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//
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// Returns {action, values}: `action` is the chosen button's `action`
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// (default "ok"/"cancel"/"delete"), or "cancel" on Esc; `values` is the array
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// of field strings in field order.
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//
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// Behaviour:
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// - Tab / Shift+Tab and arrow Down / Up cycle focus across fields and buttons.
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// - Left / Right inside a field move the caret; on a button they cycle focus.
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// - Home / End jump to start / end of the focused field.
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// - Enter on a field jumps to the next field, then to the first button. Enter
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// or Space on a button activates it.
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// - Insert at caret. Backspace deletes left of caret; Forward-Del deletes right.
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// - Blinking caret (`con.curs_set(1)`) is positioned on the focused field and
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// hidden when a button has focus.
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// - Mouse: left-click on a button activates it; click on a field puts focus
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// on that field and positions the caret under the click. Mouse hover on a
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// button moves focus to it (the same focus the keyboard uses).
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const _dialogScreen = con.getmaxyx()
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const _dialogPixDim = graphics.getPixelDimension()
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const _CELL_PW = (_dialogPixDim[0] / _dialogScreen[1]) | 0
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const _CELL_PH = (_dialogPixDim[1] / _dialogScreen[0]) | 0
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function _pxToCell(px, py) { return [(py / _CELL_PH | 0) + 1, (px / _CELL_PW | 0) + 1] }
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function showDialog(opts) {
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const fields = opts.fields || []
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const values = fields.map(f => (f.initial == null) ? '' : ('' + f.initial))
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const cursors = values.map(v => v.length)
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let oldFG = con.get_color_fore()
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let oldBG = con.get_color_back()
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let buttons
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if (opts.buttons) {
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buttons = opts.buttons
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} else {
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buttons = [{label: 'OK', action: 'ok', default: true}]
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if (opts.allowDelete) buttons.push({label: 'Delete', action: 'delete'})
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buttons.push({label: 'Cancel', action: 'cancel'})
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}
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const title = opts.title || ''
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const message = opts.message
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const messageLines = !message ? []
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: Array.isArray(message) ? message
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: ('' + message).split('\n')
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const c = opts.colours || {}
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const fg = (c.fg != null) ? c.fg : 254
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const bg = (c.bg != null) ? c.bg : 243
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const fieldBg = (c.fieldBg != null) ? c.fieldBg : 240
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const dimFg = (c.dimFg != null) ? c.dimFg : 249
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const hlFg = (c.hlFg != null) ? c.hlFg : 240
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const focusBg = (c.focusBg != null) ? c.focusBg : 253
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// Layout
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const buttonGap = 3
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const maxFieldW = fields.reduce((m, f) => Math.max(m, f.width), 16)
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const longestMsg = messageLines.reduce((m, l) => Math.max(m, l.length), 0)
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const titleW = title.length + 4
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const btnRowW = buttons.reduce((s, b) => s + b.label.length + 4, 0) + buttonGap * Math.max(0, buttons.length - 1)
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const w = Math.max(maxFieldW + 6, titleW + 4, longestMsg + 6, btnRowW + 4, 24)
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const msgTopOff = (messageLines.length > 0) ? 1 : 0
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const msgRows = messageLines.length + (messageLines.length > 0 ? 1 : 0)
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const fieldsBlockH = fields.length * 4
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const buttonsRowOff = 1 + msgRows + (fields.length > 0 ? fieldsBlockH + 1 : 1)
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const h = buttonsRowOff + 2
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const screen = con.getmaxyx()
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const row = Math.max(2, Math.floor((screen[0] - h) / 2))
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const col = Math.max(2, Math.floor((screen[1] - w) / 2))
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// Pick initial focus: explicit default > first field > first button.
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let focusIdx = -1
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for (let i = 0; i < buttons.length; i++) {
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if (buttons[i].default) { focusIdx = fields.length + i; break }
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}
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if (focusIdx < 0) focusIdx = fields.length > 0 ? 0 : fields.length
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const totalFocus = fields.length + buttons.length
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let done = null
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function fieldScroll(cur, fw) { return cur < fw ? 0 : cur - fw + 1 }
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function fieldLabelRow(i) { return row + 1 + msgRows + i * 4 }
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function fieldBoxRow(i) { return fieldLabelRow(i) + 1 }
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function fieldContentRow(i) { return fieldLabelRow(i) + 2 }
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function fieldBoxCol() { return col + 2 }
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function fieldContentRegion(i) { return { x: fieldBoxCol() + 1, y: fieldContentRow(i), w: fields[i].width } }
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function buttonRegions() {
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let bx = col + Math.floor((w - btnRowW) / 2)
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return buttons.map(b => {
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const r = { x: bx, y: row + buttonsRowOff, w: b.label.length + 4 }
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bx += b.label.length + 4 + buttonGap
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return r
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})
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}
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function drawFrameBox() {
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con.color_pair(fg, bg)
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for (let r = row; r < row + h; r++) {
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con.move(r, col)
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print(' '.repeat(w))
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}
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const wo = new WindowObject(col, row, w, h, ()=>{}, ()=>{}, title)
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wo.isHighlighted = true
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wo.titleBack = bg
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wo.drawFrame()
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con.color_pair(fg, bg)
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}
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function drawMessage() {
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if (messageLines.length === 0) return
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con.color_pair(fg, bg)
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for (let i = 0; i < messageLines.length; i++) {
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con.move(row + 1 + i, col + 2)
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print(messageLines[i].padEnd(w - 4, ' '))
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}
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}
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function drawField(i) {
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const f = fields[i]
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const fbCol = fieldBoxCol()
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const fbRow = fieldBoxRow(i)
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const fw = f.width
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const focused = (focusIdx === i)
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const frameFg = focused ? fg : dimFg
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// Label
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con.color_pair(fg, bg)
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con.move(fieldLabelRow(i), fbCol)
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print(f.label)
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// Top border (3px padding w/ TSVM chr rom)
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con.color_pair(fieldBg, bg)
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con.move(fbRow, fbCol)
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print('\u00EC' + '\u00A9'.repeat(fw) + '\u00ED')
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// Left border (3px padding w/ TSVM chr rom)
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con.move(fbRow + 1, fbCol)
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print('\u00AB')
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// the content
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con.color_pair(fg, fieldBg)
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const s = fieldScroll(cursors[i], fw)
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const vis = values[i].substring(s, s + fw)
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print(vis.padEnd(fw, ' '))
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// Right border (3px padding w/ TSVM chr rom)
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con.color_pair(fieldBg, bg)
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con.move(fbRow + 1, fbCol + fw + 1)
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print('\u00AA')
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// Bottom border (3px padding w/ TSVM chr rom)
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con.move(fbRow + 2, fbCol)
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print('\u00F4' + '\u00AC'.repeat(fw) + '\u00F5')
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con.color_pair(fg, bg)
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}
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function drawButton(i, regions) {
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const b = buttons[i]
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const bIdx = fields.length + i
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const focused = (focusIdx === bIdx)
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const r = regions[i]
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const useFg = focused ? hlFg : fg
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const useBg = focused ? focusBg : bg
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con.color_pair(useFg, useBg)
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con.move(r.y, r.x-1)
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if (focused) {
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con.color_pair(useBg, bg)
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print('\u00DE')
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con.color_pair(useFg, useBg)
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print('[ ' + b.label + ' ]')
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con.color_pair(useBg, bg)
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print('\u00DD')
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}
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else
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print(' [ ' + b.label + ' ] ')
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con.color_pair(fg, bg)
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}
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function positionCaret() {
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if (focusIdx < fields.length) {
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const fw = fields[focusIdx].width
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const s = fieldScroll(cursors[focusIdx], fw)
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con.move(fieldContentRow(focusIdx), fieldBoxCol() + 1 + (cursors[focusIdx] - s))
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con.curs_set(1)
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} else {
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con.curs_set(0)
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}
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}
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function render() {
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drawFrameBox()
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drawMessage()
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for (let i = 0; i < fields.length; i++) drawField(i)
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const regs = buttonRegions()
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for (let i = 0; i < buttons.length; i++) drawButton(i, regs)
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positionCaret()
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}
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function moveFocus(dir) {
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focusIdx = (focusIdx + dir + totalFocus) % totalFocus
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render()
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}
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function activateButton(i) {
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done = { action: buttons[i].action, values: values.slice() }
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}
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function hitTestMouse(ev) {
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const cell = _pxToCell(ev[1], ev[2])
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const cy = cell[0], cx = cell[1]
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const btnRegs = buttonRegions()
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for (let i = 0; i < btnRegs.length; i++) {
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const r = btnRegs[i]
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if (cy === r.y && cx >= r.x && cx < r.x + r.w) return { kind: 'button', idx: i }
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}
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for (let i = 0; i < fields.length; i++) {
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const r = fieldContentRegion(i)
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if (cy === r.y && cx >= r.x && cx < r.x + r.w) return { kind: 'field', idx: i, cx: cx, region: r }
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}
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return null
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}
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render()
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let eventJustReceived = true
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while (done === null) {
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input.withEvent(ev => {
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if (eventJustReceived && (ev[0] === 'key_down' || ev[0] === 'mouse_down')) {
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eventJustReceived = false; return
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}
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if (ev[0] === 'mouse_move') {
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const hit = hitTestMouse(ev)
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if (hit && hit.kind === 'button') {
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const newFocus = fields.length + hit.idx
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if (newFocus !== focusIdx) {
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focusIdx = newFocus
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render()
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}
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}
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return
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}
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if (ev[0] === 'mouse_down') {
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if (ev[3] !== 1) return
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const hit = hitTestMouse(ev)
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if (!hit) return
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if (hit.kind === 'button') {
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focusIdx = fields.length + hit.idx
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render()
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activateButton(hit.idx)
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return
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}
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if (hit.kind === 'field') {
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focusIdx = hit.idx
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const fw = fields[hit.idx].width
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const s = fieldScroll(cursors[hit.idx], fw)
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const newCur = s + (hit.cx - hit.region.x)
|
|
cursors[hit.idx] = Math.min(values[hit.idx].length, Math.max(0, newCur))
|
|
render()
|
|
}
|
|
return
|
|
}
|
|
if (ev[0] !== 'key_down') return
|
|
if (1 !== ev[2]) return
|
|
const ks = ev[1]
|
|
const shiftDown = (ev.includes(59) || ev.includes(60))
|
|
|
|
if (ks === '<ESC>') { done = { action: 'cancel', values: values.slice() }; return }
|
|
|
|
if (ks === '\t' || ks === '<TAB>') { moveFocus(shiftDown ? -1 : 1); return }
|
|
if (ks === '<UP>') { moveFocus(-1); return }
|
|
if (ks === '<DOWN>') { moveFocus(+1); return }
|
|
|
|
if (ks === '<LEFT>') {
|
|
if (focusIdx < fields.length) {
|
|
if (cursors[focusIdx] > 0) { cursors[focusIdx] -= 1; render() }
|
|
} else moveFocus(-1)
|
|
return
|
|
}
|
|
if (ks === '<RIGHT>') {
|
|
if (focusIdx < fields.length) {
|
|
if (cursors[focusIdx] < values[focusIdx].length) { cursors[focusIdx] += 1; render() }
|
|
} else moveFocus(+1)
|
|
return
|
|
}
|
|
if (ks === '<HOME>') {
|
|
if (focusIdx < fields.length) { cursors[focusIdx] = 0; render() }
|
|
return
|
|
}
|
|
if (ks === '<END>') {
|
|
if (focusIdx < fields.length) { cursors[focusIdx] = values[focusIdx].length; render() }
|
|
return
|
|
}
|
|
|
|
if (focusIdx < fields.length) {
|
|
if (ks === '\n') {
|
|
focusIdx = (focusIdx < fields.length - 1) ? focusIdx + 1 : fields.length
|
|
render()
|
|
return
|
|
}
|
|
if (ks === '\x08') {
|
|
const cur = cursors[focusIdx]
|
|
if (cur > 0) {
|
|
const v = values[focusIdx]
|
|
values[focusIdx] = v.substring(0, cur - 1) + v.substring(cur)
|
|
cursors[focusIdx] = cur - 1
|
|
render()
|
|
}
|
|
return
|
|
}
|
|
if (ks === '<DEL>') {
|
|
const cur = cursors[focusIdx]
|
|
const v = values[focusIdx]
|
|
if (cur < v.length) {
|
|
values[focusIdx] = v.substring(0, cur) + v.substring(cur + 1)
|
|
render()
|
|
}
|
|
return
|
|
}
|
|
if (typeof ks === 'string' && ks.length === 1) {
|
|
const code = ks.charCodeAt(0)
|
|
if (code >= 32 && code < 256 && values[focusIdx].length < fields[focusIdx].width * 4) {
|
|
const v = values[focusIdx]
|
|
const cur = cursors[focusIdx]
|
|
values[focusIdx] = v.substring(0, cur) + ks + v.substring(cur)
|
|
cursors[focusIdx] = cur + 1
|
|
render()
|
|
}
|
|
return
|
|
}
|
|
} else {
|
|
if (ks === '\n' || ks === ' ') { activateButton(focusIdx - fields.length); return }
|
|
}
|
|
})
|
|
}
|
|
|
|
con.curs_set(0)
|
|
con.color_pair(oldFG, oldBG)
|
|
return done
|
|
}
|
|
|
|
exports = { WindowObject, scrollVert, scrollHorz, showDialog }
|