config/config.go

@@ -1,5 +1,6 @@
 package config
 
+// Config can return global configuration parameters.
 type Config interface {
 	// Padding returns the amount of internal padding elements should have.
 	// An element's inner content (such as text) should be inset by this

theme/button.go

@@ -1,48 +0,0 @@
-package theme
-
-import "git.tebibyte.media/sashakoshka/tomo/artist"
-
-var buttonPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xCCD5D2FF)),
-			artist.NewUniform(hex(0x4B5B59FF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
-var selectedButtonPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xCCD5D2FF)),
-			artist.NewUniform(hex(0x4B5B59FF)),
-		},
-	},
-	artist.Stroke { Weight: 1, Pattern: accentPattern },
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
-var pressedButtonPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0x4B5B59FF)),
-			artist.NewUniform(hex(0x8D9894FF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
-var pressedSelectedButtonPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0x4B5B59FF)),
-			artist.NewUniform(hex(0x8D9894FF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
-var disabledButtonPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
-	artist.Stroke { Pattern: backgroundPattern })

theme/default.go

@@ -0,0 +1,167 @@
+package theme
+
+import "image"
+import "golang.org/x/image/font"
+import "git.tebibyte.media/sashakoshka/tomo/artist"
+import "git.tebibyte.media/sashakoshka/tomo/defaultfont"
+
+// Default is the default theme.
+type Default struct { }
+
+// FontFace returns the default font face.
+func (Default) FontFace (style FontStyle, size FontSize, c Case) font.Face {
+	switch style {
+	case FontStyleBold:
+		return defaultfont.FaceBold
+	case FontStyleItalic:
+		return defaultfont.FaceItalic
+	case FontStyleBoldItalic:
+		return defaultfont.FaceBoldItalic
+	default:
+		return defaultfont.FaceRegular
+	}
+}
+
+// Icon returns an icon from the default set corresponding to the given name.
+func (Default) Icon (string, Case) artist.Pattern {
+	// TODO
+	return uhex(0)
+}
+
+// Pattern returns a pattern from the default theme corresponding to the given
+// pattern ID.
+func (Default) Pattern (
+	pattern Pattern,
+	c Case,
+	state PatternState,
+) artist.Pattern {
+	switch pattern {
+	case PatternAccent:
+		return accentPattern
+	case PatternBackground:
+		return backgroundPattern
+	case PatternForeground:
+		if state.Disabled {
+			return weakForegroundPattern
+		} else {
+			return foregroundPattern
+		}
+	case PatternDead:
+		return deadPattern
+	case PatternRaised:
+		if c == C("basic", "listEntry") {
+			if state.Focused {
+				if state.On {
+					return focusedOnListEntryPattern
+				} else {
+					return focusedListEntryPattern
+				}
+			} else {
+				if state.On {
+					return onListEntryPattern
+				} else {
+					return listEntryPattern
+				}
+			}
+		} else {
+			if state.Focused {
+				return selectedRaisedPattern
+			} else {
+				return raisedPattern
+			}
+		}
+	case PatternSunken:
+		if c == C("basic", "list") {
+			if state.Focused {
+				return focusedListPattern
+			} else {
+				return listPattern
+			}
+		} else {
+			return sunkenPattern
+		}
+	case PatternPinboard:
+		return texturedSunkenPattern
+	case PatternButton:
+		if state.Disabled {
+			return disabledButtonPattern
+		} else {
+			if state.Pressed {
+				if state.Focused {
+					return pressedSelectedButtonPattern
+				} else {
+					return pressedButtonPattern
+				}
+			} else {
+				if state.Focused {
+					return selectedButtonPattern
+				} else {
+					return buttonPattern
+				}
+			}
+		}
+	case PatternInput:
+		if state.Disabled {
+			return disabledInputPattern
+		} else {
+			if state.Focused {
+				return selectedInputPattern
+			} else {
+				return inputPattern
+			}
+		}
+	case PatternGutter:
+		if state.Disabled {
+			return disabledScrollGutterPattern
+		} else {
+			return scrollGutterPattern
+		}
+	case PatternHandle:
+		if state.Disabled {
+			return disabledScrollBarPattern
+		} else {
+			if state.Focused {
+				if state.Pressed {
+					return pressedSelectedScrollBarPattern
+				} else {
+					return selectedScrollBarPattern
+				}
+			} else {
+				if state.Pressed {
+					return pressedScrollBarPattern
+				} else {
+					return scrollBarPattern
+				}
+			}
+		}
+	default:
+		return uhex(0)
+	}
+}
+
+// Inset returns the default inset value for the given pattern.
+func (Default) Inset (pattern Pattern, c Case) Inset {
+	switch pattern {
+	case PatternRaised:
+		if c == C("basic", "listEntry") {
+			return Inset { 2, 1, 2, 1 }
+		} else {
+			return Inset { 1, 1, 1, 1 }
+		}
+	case PatternSunken:
+		if c == C("basic", "list") {
+			return Inset { 4, 6, 4, 6 }
+		} else {
+			return Inset { 1, 1, 1, 1 }
+		}
+	
+	case PatternInput, PatternButton, PatternHandle, PatternPinboard:
+		return Inset { 1, 1, 1, 1}
+	default: return Inset { }
+	}
+}
+
+// Sink returns the default sink vector for the given pattern.
+func (Default) Sink (pattern Pattern, c Case) image.Point {
+	return image.Point { 1, 1 }
+}

theme/defaultpatterns.go

@@ -0,0 +1,237 @@
+package theme
+
+import "image/color"
+import "git.tebibyte.media/sashakoshka/tomo/artist"
+
+var accentPattern         = artist.NewUniform(hex(0x408090FF))
+var backgroundPattern     = artist.NewUniform(color.Gray16 { 0xAAAA })
+var foregroundPattern     = artist.NewUniform(color.Gray16 { 0x0000 })
+var weakForegroundPattern = artist.NewUniform(color.Gray16 { 0x4444 })
+var strokePattern         = artist.NewUniform(color.Gray16 { 0x0000 })
+
+var sunkenPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0x3b534eFF)),
+			artist.NewUniform(hex(0x97a09cFF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x97a09cFF)) })
+
+var texturedSunkenPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0x3b534eFF)),
+			artist.NewUniform(hex(0x97a09cFF)),
+		},
+	},
+	// artist.Stroke { Pattern: artist.Striped {
+		// First: artist.Stroke {
+			// Weight: 2,
+			// Pattern: artist.NewUniform(hex(0x97a09cFF)),
+		// },
+		// Second: artist.Stroke {
+			// Weight: 1,
+			// Pattern: artist.NewUniform(hex(0x6e8079FF)),
+		// },
+	// }})
+	
+	artist.Stroke { Pattern: artist.Noisy {
+		Low:  artist.NewUniform(hex(0x97a09cFF)),
+		High: artist.NewUniform(hex(0x6e8079FF)),
+	}})
+
+var raisedPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xDBDBDBFF)),
+			artist.NewUniform(hex(0x383C3AFF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0xAAAAAAFF)) })
+
+var selectedRaisedPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xDBDBDBFF)),
+			artist.NewUniform(hex(0x383C3AFF)),
+		},
+	},
+	artist.Stroke { Weight: 1, Pattern: accentPattern },
+	artist.Stroke { Pattern: artist.NewUniform(hex(0xAAAAAAFF)) })
+
+var deadPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x97a09cFF)) })
+
+var buttonPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xCCD5D2FF)),
+			artist.NewUniform(hex(0x4B5B59FF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
+var selectedButtonPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xCCD5D2FF)),
+			artist.NewUniform(hex(0x4B5B59FF)),
+		},
+	},
+	artist.Stroke { Weight: 1, Pattern: accentPattern },
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
+
+var pressedButtonPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0x4B5B59FF)),
+			artist.NewUniform(hex(0x8D9894FF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
+var pressedSelectedButtonPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0x4B5B59FF)),
+			artist.NewUniform(hex(0x8D9894FF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
+var disabledButtonPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
+	artist.Stroke { Pattern: backgroundPattern })
+
+var inputPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0x89925AFF)),
+			artist.NewUniform(hex(0xD2CB9AFF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0xD2CB9AFF)) })
+var selectedInputPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke { Weight: 1, Pattern: accentPattern },
+	artist.Stroke { Pattern: artist.NewUniform(hex(0xD2CB9AFF)) })
+var disabledInputPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
+	artist.Stroke { Pattern: backgroundPattern })
+
+var listPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			uhex(0x383C3AFF),
+			uhex(0x999C99FF),
+		},
+	},
+	artist.Stroke { Pattern: uhex(0x999C99FF) })
+
+var focusedListPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke { Weight: 1, Pattern: accentPattern },
+	artist.Stroke { Pattern: uhex(0x999C99FF) })
+
+var listEntryPattern = artist.Padded {
+	Stroke: uhex(0x383C3AFF),
+	Fill:   uhex(0x999C99FF),
+	Sides:  []int { 0, 0, 0, 1 },
+}
+
+var onListEntryPattern = artist.Padded {
+	Stroke: uhex(0x383C3AFF),
+	Fill:   uhex(0x6e8079FF),
+	Sides:  []int { 0, 0, 0, 1 },
+}
+
+var focusedListEntryPattern = artist.Padded {
+	Stroke: accentPattern,
+	Fill:   uhex(0x999C99FF),
+	Sides:  []int { 0, 1, 0, 1 },
+}
+
+var focusedOnListEntryPattern = artist.Padded {
+	Stroke: accentPattern,
+	Fill:   uhex(0x6e8079FF),
+	Sides:  []int { 0, 1, 0, 1 },
+}
+
+var scrollGutterPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0x3b534eFF)),
+			artist.NewUniform(hex(0x6e8079FF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x6e8079FF)) })
+var disabledScrollGutterPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
+	artist.Stroke { Pattern: backgroundPattern })
+var scrollBarPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xCCD5D2FF)),
+			artist.NewUniform(hex(0x4B5B59FF)),
+		},
+	},
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
+var selectedScrollBarPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xCCD5D2FF)),
+			artist.NewUniform(hex(0x4B5B59FF)),
+		},
+	},
+	artist.Stroke { Weight: 1, Pattern: accentPattern },
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
+var pressedScrollBarPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xCCD5D2FF)),
+			artist.NewUniform(hex(0x4B5B59FF)),
+		},
+	},
+	artist.Stroke { Weight: 1, Pattern: artist.NewUniform(hex(0x8D9894FF)) },
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x7f8c89FF)) })
+var pressedSelectedScrollBarPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: strokePattern },
+	artist.Stroke {
+		Weight: 1,
+		Pattern: artist.Beveled {
+			artist.NewUniform(hex(0xCCD5D2FF)),
+			artist.NewUniform(hex(0x4B5B59FF)),
+		},
+	},
+	artist.Stroke { Weight: 1, Pattern: accentPattern },
+	artist.Stroke { Pattern: artist.NewUniform(hex(0x7f8c89FF)) })
+var disabledScrollBarPattern = artist.NewMultiBordered (
+	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
+	artist.Stroke { Pattern: backgroundPattern })

theme/input.go

@@ -1,21 +0,0 @@
-package theme
-
-import "git.tebibyte.media/sashakoshka/tomo/artist"
-
-var inputPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0x89925AFF)),
-			artist.NewUniform(hex(0xD2CB9AFF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0xD2CB9AFF)) })
-var selectedInputPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke { Weight: 1, Pattern: accentPattern },
-	artist.Stroke { Pattern: artist.NewUniform(hex(0xD2CB9AFF)) })
-var disabledInputPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
-	artist.Stroke { Pattern: backgroundPattern })

theme/inset.go

@@ -0,0 +1,42 @@
+package theme
+
+import "image"
+
+// Inset represents an inset amount for all four sides of a rectangle. The top
+// side is at index zero, the right at index one, the bottom at index two, and
+// the left at index three. These values may be negative.
+type Inset [4]int
+
+// Apply returns the given rectangle, shrunk on all four sides by the given
+// inset. If a measurment of the inset is negative, that side will instead be
+// expanded outward. If the rectangle's dimensions cannot be reduced any
+// further, an empty rectangle near its center will be returned.
+func (inset Inset) Apply (bigger image.Rectangle) (smaller image.Rectangle) {
+	smaller = bigger
+	if smaller.Dx() < inset[3] + inset[1] {
+		smaller.Min.X = (smaller.Min.X + smaller.Max.X) / 2
+		smaller.Max.X = smaller.Min.X
+	} else {
+		smaller.Min.X += inset[3]
+		smaller.Max.X -= inset[1]
+	}
+
+	if smaller.Dy() < inset[0] + inset[2] {
+		smaller.Min.Y = (smaller.Min.Y + smaller.Max.Y) / 2
+		smaller.Max.Y = smaller.Min.Y
+	} else {
+		smaller.Min.Y += inset[0]
+		smaller.Max.Y -= inset[2]
+	}
+	return
+}
+
+// Inverse returns a negated version of the inset.
+func (inset Inset) Inverse () (prime Inset) {
+	return Inset {
+		inset[0] * -1,
+		inset[1] * -1,
+		inset[2] * -1,
+		inset[3] * -1,
+	}
+}

theme/list.go

@@ -1,43 +0,0 @@
-package theme
-
-import "git.tebibyte.media/sashakoshka/tomo/artist"
-
-var listPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			uhex(0x383C3AFF),
-			uhex(0x999C99FF),
-		},
-	},
-	artist.Stroke { Pattern: uhex(0x999C99FF) })
-
-var focusedListPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke { Weight: 1, Pattern: accentPattern },
-	artist.Stroke { Pattern: uhex(0x999C99FF) })
-
-var listEntryPattern = artist.Padded {
-	Stroke: uhex(0x383C3AFF),
-	Fill:   uhex(0x999C99FF),
-	Sides:  []int { 0, 0, 0, 1 },
-}
-
-var onListEntryPattern = artist.Padded {
-	Stroke: uhex(0x383C3AFF),
-	Fill:   uhex(0x6e8079FF),
-	Sides:  []int { 0, 0, 0, 1 },
-}
-
-var focusedListEntryPattern = artist.Padded {
-	Stroke: accentPattern,
-	Fill:   uhex(0x999C99FF),
-	Sides:  []int { 0, 1, 0, 1 },
-}
-
-var focusedOnListEntryPattern = artist.Padded {
-	Stroke: accentPattern,
-	Fill:   uhex(0x6e8079FF),
-	Sides:  []int { 0, 1, 0, 1 },
-}

theme/parse.go

@@ -0,0 +1,9 @@
+package theme
+
+import "io"
+
+// Parse parses a theme file and returns it as a Theme.
+func Parse (io.Reader) (Theme) {
+	// TODO
+	return Default { }
+}

theme/patterns.go

@@ -1,239 +0,0 @@
-package theme
-
-import "image"
-import "git.tebibyte.media/sashakoshka/tomo/artist"
-
-// Case sepecifies what kind of element is using a pattern. It contains a
-// namespace parameter and an element parameter. The element parameter does not
-// necissarily need to match an element name, but if it can, it should. Both
-// parameters should be written in camel case. Themes can change their styling
-// based on this parameter for fine-grained control over the look and feel of
-// specific elements.
-type Case struct { Namespace, Element string } 
- 
-// C can be used as shorthand to generate a case struct as used in PatternState.
-func C (namespace, element string) (c Case) {
-	return Case {
-		Namespace: namespace,
-		Element: element,
-	}
-}
-
-// PatternState lists parameters which can change the appearance of some
-// patterns. For example, passing a PatternState with Selected set to true may
-// result in a pattern that has a colored border within it.
-type PatternState struct {
-	Case
-
-	// On should be set to true if the element that is using this pattern is
-	// in some sort of "on" state, such as if a checkbox is checked or a
-	// switch is toggled on. This is only necessary if the element in
-	// question is capable of being toggled.
-	On bool
-
-	// Focused should be set to true if the element that is using this
-	// pattern is currently focused.
-	Focused bool
-
-	// Pressed should be set to true if the element that is using this
-	// pattern is being pressed down by the mouse. This is only necessary if
-	// the element in question processes mouse button events.
-	Pressed bool
-
-	// Disabled should be set to true if the element that is using this
-	// pattern is locked and cannot be interacted with. Disabled variations
-	// of patterns are typically flattened and greyed-out.
-	Disabled bool
-
-	// Invalid should be set to true if th element that is using this
-	// pattern wants to warn the user of an invalid interaction or data
-	// entry. Invalid variations typically have some sort of reddish tint
-	// or outline.
-	Invalid bool
-}
-
-// Inset represents an inset amount for all four sides of a rectangle. The top
-// side is at index zero, the right at index one, the bottom at index two, and
-// the left at index three. These values may be negative.
-type Inset [4]int
-
-// Apply returns the given rectangle, shrunk on all four sides by the given
-// inset. If a measurment of the inset is negative, that side will instead be
-// expanded outward. If the rectangle's dimensions cannot be reduced any
-// further, an empty rectangle near its center will be returned.
-func (inset Inset) Apply (bigger image.Rectangle) (smaller image.Rectangle) {
-	smaller = bigger
-	if smaller.Dx() < inset[3] + inset[1] {
-		smaller.Min.X = (smaller.Min.X + smaller.Max.X) / 2
-		smaller.Max.X = smaller.Min.X
-	} else {
-		smaller.Min.X += inset[3]
-		smaller.Max.X -= inset[1]
-	}
-
-	if smaller.Dy() < inset[0] + inset[2] {
-		smaller.Min.Y = (smaller.Min.Y + smaller.Max.Y) / 2
-		smaller.Max.Y = smaller.Min.Y
-	} else {
-		smaller.Min.Y += inset[0]
-		smaller.Max.Y -= inset[2]
-	}
-	return
-}
-
-// Inverse returns a negated version of the inset.
-func (inset Inset) Inverse () (prime Inset) {
-	return Inset {
-		inset[0] * -1,
-		inset[1] * -1,
-		inset[2] * -1,
-		inset[3] * -1,
-	}
-}
-
-// AccentPattern returns the accent pattern, which is usually just a solid
-// color.
-func AccentPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	return accentPattern, Inset { }
-}
-
-// BackgroundPattern returns the main background pattern.
-func BackgroundPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	return backgroundPattern, Inset { }
-}
-
-// DeadPattern returns a pattern that can be used to mark an area or gap that
-// serves no purpose, but still needs aesthetic structure.
-func DeadPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	return deadPattern, Inset { }
-}
-
-// ForegroundPattern returns the color text should be.
-func ForegroundPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Disabled {
-		return weakForegroundPattern, Inset { }
-	} else {
-		return foregroundPattern, Inset { }
-	}
-}
-
-// InputPattern returns a background pattern for any input field that can be
-// edited by typing with the keyboard.
-func InputPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Disabled {
-		return disabledInputPattern, Inset { 1, 1, 1, 1 }
-	} else {
-		if state.Focused {
-			return selectedInputPattern, Inset { 1, 1, 1, 1 }
-		} else {
-			return inputPattern, Inset { 1, 1, 1, 1 }
-		}
-	}
-}
-
-// ListPattern returns a background pattern for a list of things.
-func ListPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Focused {
-		pattern = focusedListPattern
-		inset = Inset { 2, 1, 2, 1 }
-	} else {
-		pattern = listPattern
-		inset = Inset { 2, 1, 1, 1 }
-	}
-	return
-}
-
-// ItemPattern returns a background pattern for a list item.
-func ItemPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Focused {
-		if state.On {
-			pattern = focusedOnListEntryPattern
-		} else {
-			pattern = focusedListEntryPattern
-		}
-	} else {
-		if state.On {
-			pattern = onListEntryPattern
-		} else {
-			pattern = listEntryPattern
-		}
-	}
-	inset = Inset { 4, 6, 4, 6 }
-	return
-}
-
-// ButtonPattern returns a pattern to be displayed on buttons.
-func ButtonPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Disabled {
-		return disabledButtonPattern, Inset { 1, 1, 1, 1 }
-	} else {
-		if state.Pressed {
-			if state.Focused {
-				return pressedSelectedButtonPattern, Inset {
-					2, 0, 0, 2 }
-			} else {
-				return pressedButtonPattern, Inset { 2, 0, 0, 2 }
-			}
-		} else {
-			if state.Focused {
-				return selectedButtonPattern, Inset { 1, 1, 1, 1 }
-			} else {
-				return buttonPattern, Inset { 1, 1, 1, 1 }
-			}
-		}
-	}
-}
-
-// GutterPattern returns a pattern to be used to mark a track along which
-// something slides.
-func GutterPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Disabled {
-		return disabledScrollGutterPattern, Inset { 0, 0, 0, 0 }
-	} else {
-		return scrollGutterPattern, Inset { 0, 0, 0, 0 }
-	}
-}
-
-// HandlePattern returns a pattern to be displayed on a grab handle that slides
-// along a gutter.
-func HandlePattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Disabled {
-		return disabledScrollBarPattern, Inset { 1, 1, 1, 1 }
-	} else {
-		if state.Focused {
-			if state.Pressed {
-				return pressedSelectedScrollBarPattern, Inset { 1, 1, 1, 1 }
-			} else {
-				return selectedScrollBarPattern, Inset { 1, 1, 1, 1 }
-			}
-		} else {
-			if state.Pressed {
-				return pressedScrollBarPattern, Inset { 1, 1, 1, 1 }
-			} else {
-				return scrollBarPattern, Inset { 1, 1, 1, 1 }
-			}
-		}
-	}
-}
-
-// SunkenPattern returns a general purpose pattern that is sunken/engraved into
-// the background.
-func SunkenPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	return sunkenPattern, Inset { 1, 1, 1, 1 }
-}
-
-// RaisedPattern returns a general purpose pattern that is raised up out of the
-// background.
-func RaisedPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	if state.Focused {
-		return selectedRaisedPattern, Inset { 1, 1, 1, 1 }
-	} else {
-		return raisedPattern, Inset { 1, 1, 1, 1 }
-	}
-}
-
-// PinboardPattern returns a textured backdrop pattern. Anything drawn within it
-// should have its own background pattern.
-func PinboardPattern (state PatternState) (pattern artist.Pattern, inset Inset) {
-	return texturedSunkenPattern, Inset { 1, 1, 1, 1 }
-}

theme/scroll.go

@@ -1,63 +0,0 @@
-package theme
-
-import "git.tebibyte.media/sashakoshka/tomo/artist"
-
-var scrollGutterPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0x3b534eFF)),
-			artist.NewUniform(hex(0x6e8079FF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x6e8079FF)) })
-var disabledScrollGutterPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
-	artist.Stroke { Pattern: backgroundPattern })
-var scrollBarPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xCCD5D2FF)),
-			artist.NewUniform(hex(0x4B5B59FF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
-var selectedScrollBarPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xCCD5D2FF)),
-			artist.NewUniform(hex(0x4B5B59FF)),
-		},
-	},
-	artist.Stroke { Weight: 1, Pattern: accentPattern },
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x8D9894FF)) })
-var pressedScrollBarPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xCCD5D2FF)),
-			artist.NewUniform(hex(0x4B5B59FF)),
-		},
-	},
-	artist.Stroke { Weight: 1, Pattern: artist.NewUniform(hex(0x8D9894FF)) },
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x7f8c89FF)) })
-var pressedSelectedScrollBarPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xCCD5D2FF)),
-			artist.NewUniform(hex(0x4B5B59FF)),
-		},
-	},
-	artist.Stroke { Weight: 1, Pattern: accentPattern },
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x7f8c89FF)) })
-var disabledScrollBarPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: weakForegroundPattern },
-	artist.Stroke { Pattern: backgroundPattern })

theme/state.go

@@ -0,0 +1,48 @@
+package theme
+
+// Case sepecifies what kind of element is using a pattern. It contains a
+// namespace parameter and an element parameter. The element parameter does not
+// necissarily need to match an element name, but if it can, it should. Both
+// parameters should be written in camel case. Themes can change their styling
+// based on this parameter for fine-grained control over the look and feel of
+// specific elements.
+type Case struct { Namespace, Element string } 
+ 
+// C can be used as shorthand to generate a case struct as used in PatternState.
+func C (namespace, element string) (c Case) {
+	return Case {
+		Namespace: namespace,
+		Element: element,
+	}
+}
+
+// PatternState lists parameters which can change the appearance of some
+// patterns. For example, passing a PatternState with Selected set to true may
+// result in a pattern that has a colored border within it.
+type PatternState struct {
+	// On should be set to true if the element that is using this pattern is
+	// in some sort of "on" state, such as if a checkbox is checked or a
+	// switch is toggled on. This is only necessary if the element in
+	// question is capable of being toggled.
+	On bool
+
+	// Focused should be set to true if the element that is using this
+	// pattern is currently focused.
+	Focused bool
+
+	// Pressed should be set to true if the element that is using this
+	// pattern is being pressed down by the mouse. This is only necessary if
+	// the element in question processes mouse button events.
+	Pressed bool
+
+	// Disabled should be set to true if the element that is using this
+	// pattern is locked and cannot be interacted with. Disabled variations
+	// of patterns are typically flattened and greyed-out.
+	Disabled bool
+
+	// Invalid should be set to true if th element that is using this
+	// pattern wants to warn the user of an invalid interaction or data
+	// entry. Invalid variations typically have some sort of reddish tint
+	// or outline.
+	Invalid bool
+}

theme/theme.go

@@ -1,113 +1,100 @@
 package theme
 
-import "image/color"
+import "image"
 import "golang.org/x/image/font"
 import "git.tebibyte.media/sashakoshka/tomo/artist"
-import "git.tebibyte.media/sashakoshka/tomo/defaultfont"
 
-// none of these colors are final! TODO: generate these values from a theme
-// file at startup.
+// FontStyle specifies stylistic alterations to a font face.
+type FontStyle int; const (
+	FontStyleRegular    FontStyle = 0
+	FontStyleBold       FontStyle = 1
+	FontStyleItalic     FontStyle = 2
+	FontStyleBoldItalic FontStyle = 1 | 2
+)
 
-func hex (color uint32) (c color.RGBA) {
-	c.A = uint8(color)
-	c.B = uint8(color >>  8)
-	c.G = uint8(color >> 16)
-	c.R = uint8(color >> 24)
-	return
-}
-
-func uhex (color uint32) (pattern artist.Pattern) {
-	return artist.NewUniform(hex(color))
-}
-
-var accentPattern         = artist.NewUniform(hex(0x408090FF))
-var backgroundPattern     = artist.NewUniform(color.Gray16 { 0xAAAA })
-var foregroundPattern     = artist.NewUniform(color.Gray16 { 0x0000 })
-var weakForegroundPattern = artist.NewUniform(color.Gray16 { 0x4444 })
-var strokePattern         = artist.NewUniform(color.Gray16 { 0x0000 })
-
-var sunkenPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0x3b534eFF)),
-			artist.NewUniform(hex(0x97a09cFF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x97a09cFF)) })
-
-var texturedSunkenPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0x3b534eFF)),
-			artist.NewUniform(hex(0x97a09cFF)),
-		},
-	},
-	// artist.Stroke { Pattern: artist.Striped {
-		// First: artist.Stroke {
-			// Weight: 2,
-			// Pattern: artist.NewUniform(hex(0x97a09cFF)),
-		// },
-		// Second: artist.Stroke {
-			// Weight: 1,
-			// Pattern: artist.NewUniform(hex(0x6e8079FF)),
-		// },
-	// }})
-	
-	artist.Stroke { Pattern: artist.Noisy {
-		Low:  artist.NewUniform(hex(0x97a09cFF)),
-		High: artist.NewUniform(hex(0x6e8079FF)),
-	}})
-
-var raisedPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xDBDBDBFF)),
-			artist.NewUniform(hex(0x383C3AFF)),
-		},
-	},
-	artist.Stroke { Pattern: artist.NewUniform(hex(0xAAAAAAFF)) })
-
-var selectedRaisedPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke {
-		Weight: 1,
-		Pattern: artist.Beveled {
-			artist.NewUniform(hex(0xDBDBDBFF)),
-			artist.NewUniform(hex(0x383C3AFF)),
-		},
-	},
-	artist.Stroke { Weight: 1, Pattern: accentPattern },
-	artist.Stroke { Pattern: artist.NewUniform(hex(0xAAAAAAFF)) })
-
-var deadPattern = artist.NewMultiBordered (
-	artist.Stroke { Weight: 1, Pattern: strokePattern },
-	artist.Stroke { Pattern: artist.NewUniform(hex(0x97a09cFF)) })
-
-// TODO: load fonts from an actual source instead of using defaultfont
-
-// FontFaceRegular returns the font face to be used for normal text.
-func FontFaceRegular () font.Face {
-	return defaultfont.FaceRegular
-}
-
-// FontFaceBold returns the font face to be used for bolded text.
-func FontFaceBold () font.Face {
-	return defaultfont.FaceBold
-}
-
-// FontFaceItalic returns the font face to be used for italicized text.
-func FontFaceItalic () font.Face {
-	return defaultfont.FaceItalic
-}
-
-// FontFaceBoldItalic returns the font face to be used for text that is both
-// bolded and italicized.
-func FontFaceBoldItalic () font.Face {
-	return defaultfont.FaceBoldItalic
+// FontSize specifies the general size of a font face in a semantic way.
+type FontSize int; const (
+	// FontSizeNormal is the default font size that should be used for most
+	// things.
+	FontSizeNormal FontSize = iota
+
+	// FontSizeLarge is a larger font size suitable for things like section
+	// headings.
+	FontSizeLarge
+
+	// FontSizeHuge is a very large font size suitable for things like
+	// titles, wizard step names, digital clocks, etc.
+	FontSizeHuge
+
+	// FontSizeSmall is a smaller font size. Try not to use this unless it
+	// makes a lot of sense to do so, because it can negatively impact
+	// accessibility. It is useful for things like copyright notices at the
+	// bottom of some window that the average user doesn't actually care
+	// about.
+	FontSizeSmall
+)
+
+// Pattern lists a number of cannonical pattern types, each with its own ID.
+// This allows custom elements to follow themes, even those that do not
+// explicitly support them.
+type Pattern int; const (
+	// PatternAccent is the accent color of the theme. It is safe to assume
+	// that this is, by default, a solid color.
+	PatternAccent Pattern = iota
+
+	// PatternBackground is the background color of the theme. It is safe to
+	// assume that this is, by default, a solid color.
+	PatternBackground
+
+	// PatternForeground is the foreground text color of the theme. It is
+	// safe to assume that this is, by default, a solid color.
+	PatternForeground
+
+	// PatternDead is a pattern that is displayed on a "dead area" where no
+	// controls exist, but there still must be some indication of visual
+	// structure (such as in the corner between two scroll bars).
+	PatternDead
+
+	// PatternRaised is a generic raised pattern.
+	PatternRaised
+
+	// PatternSunken is a generic sunken pattern.
+	PatternSunken
+
+	// PatternPinboard is similar to PatternSunken, but it is textured.
+	PatternPinboard
+
+	// PatternButton is a button pattern.
+	PatternButton
+
+	// PatternInput is a pattern for input fields, editable text areas, etc.
+	PatternInput
+
+	// PatternGutter is a track for things to slide on.
+	PatternGutter
+
+	// PatternHandle is a handle that slides along a gutter.
+	PatternHandle
+)
+
+// Theme represents a visual style configuration,
+type Theme interface {
+	// FontFace returns the proper font for a given style, size, and case.
+	FontFace (FontStyle, FontSize, Case) font.Face
+
+	// Icon returns an appropriate icon given an icon name and case.
+	Icon (string, Case) artist.Pattern
+
+	// Pattern returns an appropriate pattern given a pattern name, case,
+	// and state.
+	Pattern (Pattern, Case, PatternState) artist.Pattern
+
+	// Inset returns the area on all sides of a given pattern that is not
+	// meant to be drawn on.
+	Inset (Pattern, Case) Inset
+
+	// Sink returns a vector that should be added to an element's inner
+	// content when it is pressed down (if applicable) to simulate a 3D
+	// sinking effect.
+	Sink (Pattern, Case) image.Point
 }

theme/util.go

@@ -0,0 +1,16 @@
+package theme
+
+import "image/color"
+import "git.tebibyte.media/sashakoshka/tomo/artist"
+
+func hex (color uint32) (c color.RGBA) {
+	c.A = uint8(color)
+	c.B = uint8(color >>  8)
+	c.G = uint8(color >> 16)
+	c.R = uint8(color >> 24)
+	return
+}
+
+func uhex (color uint32) (pattern artist.Pattern) {
+	return artist.NewUniform(hex(color))
+}