commit 9d36659ba98d4aec2119af8a536c0006c8b9870e Author: Sasha Koshka Date: Fri Apr 7 23:33:39 2023 -0400 Add all these files diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..34ff01a --- /dev/null +++ b/README.md @@ -0,0 +1,6 @@ +# piss + +*Not to be confused with [pissterm](https://git.tebibyte.media/mars/piss).* + +A modular terminal emulator for Tomo. It can be embedded as an element into +another window, or used as a standalone application. diff --git a/ansi/c0.go b/ansi/c0.go new file mode 100644 index 0000000..6d37ff2 --- /dev/null +++ b/ansi/c0.go @@ -0,0 +1,38 @@ +package ansi + +// C0 represents a list of C0 control codes. +// https://en.wikipedia.org/wiki/C0_and_C1_control_codes +type C0 byte; const ( + C0_Null C0 = iota + C0_StartOfHeading + C0_StartOfText + C0_EndOfText + C0_EndOfTransmission + C0_Enquiry + C0_Acknowledge + C0_Bell + C0_Backspace + C0_CharacterTab + C0_LineFeed + C0_LineTab + C0_FormFeed + C0_CarriageReturn + C0_ShiftOut + C0_ShiftIn + C0_DataLinkEscape + C0_DeviceControlOne + C0_DeviceControlTwo + C0_DeviceControlThree + C0_DeviceControlFour + C0_NegativeAcknowledge + C0_SynchronousIdle + C0_EndOfTransmissionBlock + C0_Cancel + C0_EndOfMedium + C0_Substitute + C0_Escape + C0_FileSeparator + C0_GroupSeparator + C0_RecordSeparator + C0_UnitSeparator +) diff --git a/ansi/c1.go b/ansi/c1.go new file mode 100644 index 0000000..2448367 --- /dev/null +++ b/ansi/c1.go @@ -0,0 +1,48 @@ +package ansi + +// C1 represents a list of C1 control codes. +// https://en.wikipedia.org/wiki/C0_and_C1_control_codes +type C1 byte; const ( + C1_PaddingCharacter C1 = iota + 128 + C1_HighOctetPreset + C1_BreakPermittedHere + C1_NoBreakHere + C1_Index + C1_NextLine + C1_StartOfSelectedArea + C1_EndOfSelectedArea + C1_CharacterTabSet + C1_CharacterTabWithJustification + C1_LineTabSet + C1_PartialLineForward + C1_PartialLineBackward + C1_ReverseLineFeed + C1_SingleShift2 + C1_SingleShift3 + C1_DeviceControlString + C1_PrivateUse1 + C1_PrivateUse2 + C1_SetTransmitState + C1_CancelCharacter + C1_MessageWaiting + C1_StartOfProtectedArea + C1_EndOfProtectedArea + C1_StartOfString + C1_SingleGraphicCharacterIntroducer + C1_SingleCharacterIntroducer + C1_ControlSequenceIntroducer + C1_StringTerminator + C1_OperatingSystemCommand + C1_PrivacyMessage + C1_ApplicationProgramCommand +) + +// Is checks if a byte is equal to a C0 code. +func (code C0) Is (test byte) bool { + return test == byte(code) +} + +// Is checks if a byte is equal to a C1 code. +func (code C1) Is (test byte) bool { + return byte(code) == test +} diff --git a/ansi/color.go b/ansi/color.go new file mode 100644 index 0000000..5bb052f --- /dev/null +++ b/ansi/color.go @@ -0,0 +1,90 @@ +package ansi + +import "image/color" + +var _ color.Color = Color(0) + +// Color represents a 3, 4, or 8-Bit ansi color. +type Color byte; const ( + // Dim/standard colors + ColorBlack Color = iota + ColorRed + ColorGreen + ColorYellow + ColorBlue + ColorMagenta + ColorCyan + ColorWhite + + // Bright colors + ColorBrightBlack + ColorBrightRed + ColorBrightGreen + ColorBrightYellow + ColorBrightBlue + ColorBrightMagenta + ColorBrightCyan + ColorBrightWhite + + // 216 cube colors (16 - 231) + // 24 grayscale colors (232 - 255) +) + +// Is16 returns whether the color is a dim or bright color, and can be assigned +// to a theme palette. +func (c Color) Is16 () bool { + return c.IsDim() || c.IsBright() +} + +// IsDim returns whether the color is dim. +func (c Color) IsDim () bool { + return c < 8 +} + +// IsBright returns whether the color is bright. +func (c Color) IsBright () bool { + return c >= 8 && c < 16 +} + +// IsCube returns whether the color is part of the 6x6x6 cube. +func (c Color) IsCube () bool { + return c >= 16 && c < 232 +} + +// IsGrayscale returns whether the color grayscale. +func (c Color) IsGrayscale () bool { + return c >= 232 && c <= 255 +} + +// RGB returns the 8 bit RGB values of the color as a color.RGBA value. +func (c Color) RGB () (out color.RGBA) { + switch { + case c.Is16(): + // each bit is a color component + out.R = 0xFF * uint8((c & 0x1) >> 0) + out.G = 0xFF * uint8((c & 0x2) >> 1) + out.B = 0xFF * uint8((c & 0x4) >> 3) + // dim if color is in the dim range + if c & 0x8 > 0 { out.R >>= 1; out.G >>= 1; out.B >>= 1 } + + case c.IsCube(): + index := int(c - 16) + out.R = uint8((((index / 36) % 6) * 255) / 5) + out.G = uint8((((index / 6) % 6) * 255) / 5) + out.B = uint8((((index ) % 6) * 255) / 5) + + case c.IsGrayscale(): + out.R = uint8(((int(c) - 232) * 255) / 23) + out.G = out.R + out.B = out.R + } + + out.A = 0xFF + return + +} + +// RGBA fulfills the color.Color interface. +func (c Color) RGBA () (r, g, b, a uint32) { + return c.RGB().RGBA() +} diff --git a/ansi/csi.go b/ansi/csi.go new file mode 100644 index 0000000..7fb8969 --- /dev/null +++ b/ansi/csi.go @@ -0,0 +1,17 @@ +package ansi + +// CSI represents a list of CSI sequences that have no parameters. +// FIXME: some of these do indeed have parameters +type CSI int; const ( + CSI_DeviceStatusReport CSI = iota + CSI_SaveCursorPosition + CSI_RestoreCursorPosition + CSI_ShowCursor + CSI_HideCursor + CSI_EnableReportingFocus + CSI_DisableReportingFocus + CSI_EnableAlternativeBuffer + CSI_DisableAlternativeBuffer + CSI_EnableBracketedPasteMode + CSI_DisableBracketedPasteMode +) diff --git a/ansi/decoder.go b/ansi/decoder.go new file mode 100644 index 0000000..4057e67 --- /dev/null +++ b/ansi/decoder.go @@ -0,0 +1,360 @@ +package ansi + +import "strconv" +import "strings" +import "image/color" + +// Useful: https://en.wikipedia.org/wiki/ANSI_escape_code + +// Decoder is a state machine capable of decoding text contianing various escape +// codes and sequences. It satisfies io.Writer. It has no constructor and its +// zero value can be used safely. +type Decoder struct { + // OnText is called when a segment of text is processed. + OnText func (string) + + // OnC0 is called when a C0 control code is processed that isn't a + // whitespace character. + OnC0 func (C0) + + // OnC1 is called when a C1 escape sequence is processed. + OnC1 func (C1) + + // OnDCS is called when a device control string is processed. + OnDCS func (string) + + // OnCSI is called when a non-SGR CSI escape sequence with no parameters + // is processed. + OnCSI func (CSI) + + // OnSGR is called when a CSI SGR escape sequence with no parameters is + // processed. + OnSGR func (SGR) + + // OnPM is called when a privacy message is processed. + OnPM func (string) + + // OnAPC is called when an application program command is processed. + OnAPC func (string) + + // Non-SGR CSI sequences with parameters: + OnCursorUp func (distance int) + OnCursorDown func (distance int) + OnCursorForward func (distance int) + OnCursorBack func (distance int) + OnCursorNextLine func (distance int) + OnCursorPreviousLine func (distance int) + OnCursorHorizontalAbsolute func (column int) + OnCursorPosition func (column, row int) + OnEraseInDisplay func (mode int) + OnEraseInLine func (mode int) + OnScrollUp func (distance int) + OnScrollDown func (distance int) + OnHorizontalVerticalPosition func (column, row int) + + // SGR CSI sequences with parameters: + OnForegroundColor func (Color) + OnForegroundColorTrue func (color.RGBA) + OnBackgroundColor func (Color) + OnBackgroundColorTrue func (color.RGBA) + OnUnderlineColor func (Color) + OnUnderlineColorTrue func (color.RGBA) + + // OSC sequences from XTerm: + OnWindowTitle func (title string) + OnIconName func (name string) + OnIconFile func (path string) + OnXProperty func (property, value string) + OnSelectionPut func (selection, text string) + OnSelectionGet func (selection string) + OnQueryAllowed func () + OnQueryDisallowed func () + + // OSC sequences from iTerm2: + OnCursorShape func (shape int) + OnHyperlink func (params map[string] string, text, link string) + OnBackgroundImage func (path string) + + state decodeState + expectingST bool + gathered []byte +} + +type decodeState int; const ( + decodeStateText decodeState = iota + decodeStateAwaitC1 + + decodeStateGatherDCS + decodeStateGatherSOS + decodeStateGatherCSI + decodeStateGatherOSC + decodeStateGatherPM + decodeStateGatherAPC +) + +func (decoder *Decoder) Write (buffer []byte) (wrote int, err error) { + wrote = len(buffer) + + for len(buffer) > 0 { + switch decoder.state { + case decodeStateText: + if C0_Escape.Is(buffer[0]) { + // begin C1 control code + decoder.state = decodeStateAwaitC1 + buffer = buffer[1:] + + } else if buffer[0] < ' ' { + // process C0 control code + if decoder.OnC0 != nil { + decoder.OnC0(C0(buffer[0])) + } + buffer = buffer[1:] + + } else { + // process as much plain text as we can + buffer = decoder.processString(buffer) + } + + case decodeStateAwaitC1: + if buffer[0] < 128 { + // false alarm, this is just a C0 escape + if decoder.OnC0 != nil { + decoder.OnC0(C0_Escape) + } + break + } + + switch C1(buffer[0]) { + case C1_DeviceControlString: + decoder.state = decodeStateGatherDCS + case C1_StartOfString: + decoder.state = decodeStateGatherSOS + case C1_ControlSequenceIntroducer: + decoder.state = decodeStateGatherCSI + case C1_OperatingSystemCommand: + decoder.state = decodeStateGatherOSC + case C1_PrivacyMessage: + decoder.state = decodeStateGatherPM + case C1_ApplicationProgramCommand: + decoder.state = decodeStateGatherAPC + default: + // process C1 control code + if decoder.OnC1 != nil { + decoder.OnC1(C1(buffer[0])) + } + } + buffer = buffer[1:] + + case + decodeStateGatherDCS, + decodeStateGatherSOS, + decodeStateGatherOSC, + decodeStateGatherPM, + decodeStateGatherAPC: + + if decoder.expectingST && C1_StringTerminator.Is(buffer[0]) { + // remove the trailing ESC + decoder.gathered = decoder.gathered [ + :len(decoder.gathered) - 1] + + if decoder.state == decodeStateGatherOSC { + // we understand some OSC codes so we + // handle them differently + decoder.processOSC() + } else { + // generic handler for uncommon stuff + decoder.processGeneric() + } + decoder.state = decodeStateText + } + if C0_Escape.Is(buffer[0]) { + decoder.expectingST = true + } + + case decodeStateGatherCSI: + decoder.gather(buffer[0]) + if buffer[0] < 0x30 || buffer[0] > 0x3F { + decoder.processCSI() + decoder.state = decodeStateText + } + buffer = buffer[1:] + } + } + + return +} + +func (decoder *Decoder) gather (character byte) { + decoder.gathered = append(decoder.gathered, character) +} + +func (decoder *Decoder) processString (buffer []byte) []byte { + for index, char := range buffer { + if C0_Escape.Is(char) { + if decoder.OnText != nil { + decoder.OnText(string(buffer[:index])) + } + return buffer[:index] + } + } + return buffer +} + +func (decoder *Decoder) processGeneric () { + parameter := string(decoder.gathered) + switch decoder.state { + case decodeStateGatherDCS: + if decoder.OnDCS != nil { decoder.OnDCS(parameter) } + case decodeStateGatherSOS: + if decoder.OnText != nil { decoder.OnText(parameter) } + case decodeStateGatherPM: + if decoder.OnPM != nil { decoder.OnPM(parameter) } + case decodeStateGatherAPC: + if decoder.OnAPC != nil { decoder.OnAPC(parameter) } + } +} + +func (decoder *Decoder) processOSC () { + // TODO: analyze OSC +} + +func (decoder *Decoder) processCSI () { + if len(decoder.gathered) < 2 { return } + parameters := ParameterInts(decoder.gathered) + + var p0, p1, p2, p3 int + if len(parameters) > 0 { p0 = parameters[0] } + if len(parameters) > 1 { p1 = parameters[1] } + if len(parameters) > 2 { p2 = parameters[2] } + if len(parameters) > 3 { p3 = parameters[3] } + + switch Last(decoder.gathered) { + case 'A': if decoder.OnCursorUp != nil { decoder.OnCursorUp(clampOne(p0)) } + case 'B': if decoder.OnCursorDown != nil { decoder.OnCursorDown(clampOne(p0)) } + case 'C': if decoder.OnCursorForward != nil { decoder.OnCursorForward(clampOne(p0)) } + case 'D': if decoder.OnCursorBack != nil { decoder.OnCursorBack(clampOne(p0)) } + case 'E': if decoder.OnCursorNextLine != nil { decoder.OnCursorNextLine(clampOne(p0)) } + case 'F': if decoder.OnCursorPreviousLine != nil { decoder.OnCursorPreviousLine(clampOne(p0)) } + case 'G': if decoder.OnCursorHorizontalAbsolute != nil { decoder.OnCursorHorizontalAbsolute(clampOne(p0)) } + case 'H', 'f': if decoder.OnCursorPosition != nil { decoder.OnCursorPosition(clampOne(p0), clampOne(p1)) } + + case 'J': if decoder.OnEraseInDisplay != nil { decoder.OnEraseInDisplay(p0) } + case 'K': if decoder.OnEraseInLine != nil { decoder.OnEraseInLine(p0) } + case 'S': if decoder.OnScrollUp != nil { decoder.OnScrollUp(clampOne(p0)) } + case 'T': if decoder.OnScrollDown != nil { decoder.OnScrollDown(clampOne(p0)) } + + case 'm': + p0 := SGR(p0) + switch { + case + p0 >= SGR_ForegroundColorBlack && + p0 <= SGR_ForegroundColorWhite && + decoder.OnForegroundColor != nil : + decoder.OnForegroundColor(Color(p0 - SGR_ForegroundColorBlack)) + case + p0 >= SGR_ForegroundColorBrightBlack && + p0 <= SGR_ForegroundColorBrightWhite && + decoder.OnForegroundColor != nil : + decoder.OnForegroundColor(Color(p0 - SGR_ForegroundColorBrightBlack + 8)) + + case p0 == SGR_ForegroundColor: + switch p1 { + case 2: + if decoder.OnForegroundColor == nil { break } + decoder.OnForegroundColor(Color(p1)) + case 5: + if decoder.OnForegroundColorTrue == nil { break } + decoder.OnForegroundColorTrue (color.RGBA { + R: uint8(p1), + G: uint8(p2), + B: uint8(p3), + A: 0xFF, + }) + } + + case + p0 >= SGR_BackgroundColorBlack && + p0 <= SGR_BackgroundColorWhite && + decoder.OnBackgroundColor != nil : + decoder.OnBackgroundColor(Color(p0 - SGR_BackgroundColorBlack)) + case + p0 >= SGR_BackgroundColorBrightBlack && + p0 <= SGR_BackgroundColorBrightWhite && + decoder.OnBackgroundColor != nil : + decoder.OnBackgroundColor(Color(p0 - SGR_BackgroundColorBrightBlack + 8)) + + case p0 == SGR_BackgroundColor: + switch p1 { + case 2: + if decoder.OnBackgroundColor == nil { break } + decoder.OnBackgroundColor(Color(p1)) + case 5: + if decoder.OnBackgroundColorTrue == nil { break } + decoder.OnBackgroundColorTrue (color.RGBA { + R: uint8(p1), + G: uint8(p2), + B: uint8(p3), + A: 0xFF, + }) + } + + case p0 == SGR_UnderlineColor: + switch p1 { + case 2: + if decoder.OnUnderlineColor == nil { break } + decoder.OnUnderlineColor(Color(p1)) + case 5: + if decoder.OnUnderlineColorTrue == nil { break } + decoder.OnUnderlineColorTrue (color.RGBA { + R: uint8(p1), + G: uint8(p2), + B: uint8(p3), + A: 0xFF, + }) + } + + default: if decoder.OnSGR != nil { decoder.OnSGR(SGR(p0)) } + } + + // TODO + case 'n': + case 's': + case 'u': + case 'h': + case 'l': + } +} + +func clampOne (number int) int { + if number < 1 { + return 1 + } else { + return number + } +} + +// Last returns the last item of a slice. +func Last[T any] (source []T) T { + return source[len(source) - 1] +} + +// ParameterStrings separates a byte slice by semicolons into a list of strings. +func ParameterStrings (source []byte) (parameters []string) { + parameters = strings.Split(string(source), ";") + for index := range parameters { + parameters[index] = strings.TrimSpace(parameters[index]) + } + return +} + +// ParameterInts is like ParameterStrings, but returns integers instead of +// strings. If a parameter is empty or cannot be converted into an integer, that +// parameter will be zero. +func ParameterInts (source []byte) (parameters []int) { + stringParameters := ParameterStrings(source) + parameters = make([]int, len(stringParameters)) + for index, parameter := range stringParameters { + parameters[index], _ = strconv.Atoi(parameter) + } + return +} diff --git a/ansi/sgr.go b/ansi/sgr.go new file mode 100644 index 0000000..1aa6197 --- /dev/null +++ b/ansi/sgr.go @@ -0,0 +1,97 @@ +package ansi + +// SGR represents a list of Select Graphic Rendition parameters. +type SGR int; const ( + SGR_Normal SGR = iota + SGR_Bold + SGR_Dim + SGR_Italic + SGR_Underline + SGR_SlowBlink + SGR_RapidBlink + SGR_Reverse + SGR_Conceal + SGR_Strike + + SGR_FontPrimary + SGR_Font1 + SGR_Font2 + SGR_Font3 + SGR_Font4 + SGR_Font5 + SGR_Font6 + SGR_Font7 + SGR_Font8 + SGR_Font9 + SGR_FontFraktur + + SGR_DoubleUnderline + SGR_NormalIntensity + SGR_NeitherItalicNorBlackletter + SGR_NotUnderlined + SGR_NotBlinking + SGR_PorportionalSpacing + SGR_NotReversed + SGR_NotCrossedOut + + SGR_ForegroundColorBlack + SGR_ForegroundColorRed + SGR_ForegroundColorGreen + SGR_ForegroundColorYellow + SGR_ForegroundColorBlue + SGR_ForegroundColorMagenta + SGR_ForegroundColorCyan + SGR_ForegroundColorWhite + SGR_ForegroundColor + SGR_ForegroundColorDefault + + SGR_BackgroundColorBlack + SGR_BackgroundColorRed + SGR_BackgroundColorGreen + SGR_BackgroundColorYellow + SGR_BackgroundColorBlue + SGR_BackgroundColorMagenta + SGR_BackgroundColorCyan + SGR_BackgroundColorWhite + SGR_BackgroundColor + SGR_BackgroundColorDefault + + SGR_DisablePorportionalSpacing + SGR_Framed + SGR_Encircled + SGR_Overlined + SGR_NeitherFramedNorEncircled + SGR_NotOverlined + + SGR_UnderlineColor + SGR_UnderlineColorDefault + + SGR_IdeogramUnderline + SGR_IdeogramDoubleUnderline + SGR_IdeogramOverline + SGR_IdeogramDoubleOverline + SGR_IdeogramStressMarking + SGR_NoIdeogramAttributes + + SGR_Superscript + SGR_Subscript + SGR_NeitherSuperscriptNorSubscript + + SGR_ForegroundColorBrightBlack + SGR_ForegroundColorBrightRed + SGR_ForegroundColorBrightGreen + SGR_ForegroundColorBrightYellow + SGR_ForegroundColorBrightBlue + SGR_ForegroundColorBrightMagenta + SGR_ForegroundColorBrightCyan + SGR_ForegroundColorBrightWhite + + SGR_BackgroundColorBrightBlack + SGR_BackgroundColorBrightRed + SGR_BackgroundColorBrightGreen + SGR_BackgroundColorBrightYellow + SGR_BackgroundColorBrightBlue + SGR_BackgroundColorBrightMagenta + SGR_BackgroundColorBrightCyan + SGR_BackgroundColorBrightWhite +) diff --git a/elements/grid.go b/elements/grid.go new file mode 100644 index 0000000..9dbb7b4 --- /dev/null +++ b/elements/grid.go @@ -0,0 +1,167 @@ +package elements + +import "image" +import "golang.org/x/image/font" +import "git.tebibyte.media/sashakoshka/tomo" +import "git.tebibyte.media/sashakoshka/tomo/input" +import "git.tebibyte.media/sashakoshka/tomo/default/theme" +import "git.tebibyte.media/sashakoshka/tomo/default/config" +// import "git.tebibyte.media/sashakoshka/tomo/textdraw" +import "git.tebibyte.media/sashakoshka/tomo/elements/core" + +type gridCell struct { + rune + tomo.FontStyle + background tomo.Color + foreground tomo.Color + clean bool +} + +func (cell *gridCell) initColor () { + cell.background = tomo.ColorBackground + cell.foreground = tomo.ColorForeground +} + +type gridBuffer struct { + cells []gridCell + stride int +} + +// Grid is an array of monospaced character cells. Each one has a foreground and +// background color. It satisfies io.Writer and can be fed text with ANSI escape +// codes. +type Grid struct { + *core.Core + *core.FocusableCore + core core.CoreControl + + cells []gridCell + stride int + cellWidth int + cellHeight int + + cursor image.Point + + face font.Face + config config.Wrapped + theme theme.Wrapped + + onResize func () +} + +func NewGrid () (element *Grid) { + element = &Grid { } + element.theme.Case = tomo.C("tomo", "grid") + element.Core, element.core = core.NewCore(element, element.drawAndPush) + element.updateFont() + element.updateMinimumSize() + return +} + +func (element *Grid) OnResize (callback func ()) { + element.onResize = callback +} + +func (element *Grid) Write (data []byte) (wrote int, err error) { + // TODO process ansi escape codes etx +} + +func (element *Grid) HandleMouseDown (x, y int, button input.Button) { + +} + +func (element *Grid) HandleMouseUp (x, y int, button input.Button) { + +} + +func (element *Grid) HandleKeyDown (key input.Key, modifiers input.Modifiers) { + // TODO we need to grab shift ctrl c for copying text +} + +func (element *Grid) HandleKeyUp(key input.Key, modifiers input.Modifiers) { } + +// SetTheme sets the element's theme. +func (element *Grid) SetTheme (new tomo.Theme) { + if new == element.theme.Theme { return } + element.theme.Theme = new + element.updateFont() + element.updateMinimumSize() + element.drawAndPush() +} + +// SetConfig sets the element's configuration. +func (element *Grid) SetConfig (new tomo.Config) { + if new == element.config.Config { return } + element.config.Config = new + element.updateMinimumSize() + element.drawAndPush() +} + +func (element *Grid) alloc () bool { + bounds := element.Bounds() + width := bounds.Dx() / element.cellWidth + height := bounds.Dy() / element.cellHeight + unchanged := + width == element.stride && + height == len(element.cells) / element.stride + if unchanged { return false } + + oldCells := element.cells + oldWidth := element.stride + oldHeight := len(element.cells) / element.stride + heightLarger := height < oldHeight + + element.stride = width + element.cells = make([]gridCell, width * height) + + // TODO: attempt to wrap text? + + if heightLarger { + for index := range element.cells[oldHeight * width:] { + element.cells[index].initColor() + }} + + commonHeight := height + if heightLarger { commonHeight = oldHeight } + for index := range element.cells[:commonHeight * width] { + x := index % width + if x < oldWidth { + element.cells[index] = oldCells[x + index / oldWidth] + } else { + element.cells[index].initColor() + } + } + + if element.onResize != nil { element.onResize() } + return true +} + +func (element *Grid) updateFont () { + element.face = element.theme.FontFace ( + tomo.FontStyleMonospace, + tomo.FontSizeNormal) + emSpace, _ := element.face.GlyphAdvance('M') + metrics := element.face.Metrics() + element.cellWidth = emSpace.Round() + element.cellHeight = metrics.Height.Round() +} + +func (element *Grid) updateMinimumSize () { + element.core.SetMinimumSize(element.cellWidth, element.cellHeight) +} + +func (element *Grid) state () tomo.State { + return tomo.State { + + } +} + +func (element *Grid) drawAndPush () { + if element.core.HasImage () { + element.core.DamageRegion(element.draw(true)) + } +} + +func (element *Grid) draw (force bool) image.Rectangle { + +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..1edfa59 --- /dev/null +++ b/go.mod @@ -0,0 +1,3 @@ +module git.tebibyte.media/sashakoshka/piss + +go 1.20