diff options
Diffstat (limited to 'ui/messages/html')
| -rw-r--r-- | ui/messages/html/blockquote.go | 49 | ||||
| -rw-r--r-- | ui/messages/html/break.go | 28 | ||||
| -rw-r--r-- | ui/messages/html/codeblock.go | 48 | ||||
| -rw-r--r-- | ui/messages/html/colormap.go | 156 | ||||
| -rw-r--r-- | ui/messages/html/entity.go | 312 | ||||
| -rw-r--r-- | ui/messages/html/list.go | 80 | ||||
| -rw-r--r-- | ui/messages/html/parser.go | 380 |
7 files changed, 1053 insertions, 0 deletions
diff --git a/ui/messages/html/blockquote.go b/ui/messages/html/blockquote.go new file mode 100644 index 0000000..30ce52e --- /dev/null +++ b/ui/messages/html/blockquote.go @@ -0,0 +1,49 @@ +// gomuks - A terminal Matrix client written in Go. +// Copyright (C) 2019 Tulir Asokan +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +package html + +import ( + "fmt" + + "maunium.net/go/mauview" +) + +type BlockquoteEntity struct { + *BaseEntity +} + +const BlockQuoteChar = '>' + +func NewBlockquoteEntity(children []Entity) *BlockquoteEntity { + return &BlockquoteEntity{&BaseEntity{ + Tag: "blockquote", + Children: children, + Block: true, + Indent: 2, + }} +} + +func (be *BlockquoteEntity) Draw(screen mauview.Screen) { + be.BaseEntity.Draw(screen) + for y := 0; y < be.height; y++ { + screen.SetContent(0, y, BlockQuoteChar, nil, be.Style) + } +} + +func (be *BlockquoteEntity) String() string { + return fmt.Sprintf("&html.BlockquoteEntity{%s},\n", be.BaseEntity) +} diff --git a/ui/messages/html/break.go b/ui/messages/html/break.go new file mode 100644 index 0000000..d400f00 --- /dev/null +++ b/ui/messages/html/break.go @@ -0,0 +1,28 @@ +// gomuks - A terminal Matrix client written in Go. +// Copyright (C) 2019 Tulir Asokan +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +package html + +type BreakEntity struct { + *BaseEntity +} + +func NewBreakEntity() *BreakEntity { + return &BreakEntity{&BaseEntity{ + Tag: "br", + Block: true, + }} +} diff --git a/ui/messages/html/codeblock.go b/ui/messages/html/codeblock.go new file mode 100644 index 0000000..ec6181d --- /dev/null +++ b/ui/messages/html/codeblock.go @@ -0,0 +1,48 @@ +// gomuks - A terminal Matrix client written in Go. +// Copyright (C) 2019 Tulir Asokan +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +package html + +import ( + "maunium.net/go/mauview" + "maunium.net/go/tcell" +) + +type CodeBlockEntity struct { + *BaseEntity + Background tcell.Style +} + +func NewCodeBlockEntity(children []Entity, background tcell.Style) *CodeBlockEntity { + return &CodeBlockEntity{ + BaseEntity: &BaseEntity{ + Tag: "pre", + Block: true, + Children: children, + }, + Background: background, + } +} + +func (ce *CodeBlockEntity) Draw(screen mauview.Screen) { + screen.Fill(' ', ce.Background) + ce.BaseEntity.Draw(screen) +} + +func (ce *CodeBlockEntity) AdjustStyle(fn AdjustStyleFunc) Entity { + // Don't allow adjusting code block style. + return ce +} diff --git a/ui/messages/html/colormap.go b/ui/messages/html/colormap.go new file mode 100644 index 0000000..305309c --- /dev/null +++ b/ui/messages/html/colormap.go @@ -0,0 +1,156 @@ +// From https://github.com/golang/image/blob/master/colornames/colornames.go +package html + +import ( + "image/color" +) + +var colorMap = map[string]color.RGBA{ + "aliceblue": {0xf0, 0xf8, 0xff, 0xff}, // rgb(240, 248, 255) + "antiquewhite": {0xfa, 0xeb, 0xd7, 0xff}, // rgb(250, 235, 215) + "aqua": {0x00, 0xff, 0xff, 0xff}, // rgb(0, 255, 255) + "aquamarine": {0x7f, 0xff, 0xd4, 0xff}, // rgb(127, 255, 212) + "azure": {0xf0, 0xff, 0xff, 0xff}, // rgb(240, 255, 255) + "beige": {0xf5, 0xf5, 0xdc, 0xff}, // rgb(245, 245, 220) + "bisque": {0xff, 0xe4, 0xc4, 0xff}, // rgb(255, 228, 196) + "black": {0x00, 0x00, 0x00, 0xff}, // rgb(0, 0, 0) + "blanchedalmond": {0xff, 0xeb, 0xcd, 0xff}, // rgb(255, 235, 205) + "blue": {0x00, 0x00, 0xff, 0xff}, // rgb(0, 0, 255) + "blueviolet": {0x8a, 0x2b, 0xe2, 0xff}, // rgb(138, 43, 226) + "brown": {0xa5, 0x2a, 0x2a, 0xff}, // rgb(165, 42, 42) + "burlywood": {0xde, 0xb8, 0x87, 0xff}, // rgb(222, 184, 135) + "cadetblue": {0x5f, 0x9e, 0xa0, 0xff}, // rgb(95, 158, 160) + "chartreuse": {0x7f, 0xff, 0x00, 0xff}, // rgb(127, 255, 0) + "chocolate": {0xd2, 0x69, 0x1e, 0xff}, // rgb(210, 105, 30) + "coral": {0xff, 0x7f, 0x50, 0xff}, // rgb(255, 127, 80) + "cornflowerblue": {0x64, 0x95, 0xed, 0xff}, // rgb(100, 149, 237) + "cornsilk": {0xff, 0xf8, 0xdc, 0xff}, // rgb(255, 248, 220) + "crimson": {0xdc, 0x14, 0x3c, 0xff}, // rgb(220, 20, 60) + "cyan": {0x00, 0xff, 0xff, 0xff}, // rgb(0, 255, 255) + "darkblue": {0x00, 0x00, 0x8b, 0xff}, // rgb(0, 0, 139) + "darkcyan": {0x00, 0x8b, 0x8b, 0xff}, // rgb(0, 139, 139) + "darkgoldenrod": {0xb8, 0x86, 0x0b, 0xff}, // rgb(184, 134, 11) + "darkgray": {0xa9, 0xa9, 0xa9, 0xff}, // rgb(169, 169, 169) + "darkgreen": {0x00, 0x64, 0x00, 0xff}, // rgb(0, 100, 0) + "darkgrey": {0xa9, 0xa9, 0xa9, 0xff}, // rgb(169, 169, 169) + "darkkhaki": {0xbd, 0xb7, 0x6b, 0xff}, // rgb(189, 183, 107) + "darkmagenta": {0x8b, 0x00, 0x8b, 0xff}, // rgb(139, 0, 139) + "darkolivegreen": {0x55, 0x6b, 0x2f, 0xff}, // rgb(85, 107, 47) + "darkorange": {0xff, 0x8c, 0x00, 0xff}, // rgb(255, 140, 0) + "darkorchid": {0x99, 0x32, 0xcc, 0xff}, // rgb(153, 50, 204) + "darkred": {0x8b, 0x00, 0x00, 0xff}, // rgb(139, 0, 0) + "darksalmon": {0xe9, 0x96, 0x7a, 0xff}, // rgb(233, 150, 122) + "darkseagreen": {0x8f, 0xbc, 0x8f, 0xff}, // rgb(143, 188, 143) + "darkslateblue": {0x48, 0x3d, 0x8b, 0xff}, // rgb(72, 61, 139) + "darkslategray": {0x2f, 0x4f, 0x4f, 0xff}, // rgb(47, 79, 79) + "darkslategrey": {0x2f, 0x4f, 0x4f, 0xff}, // rgb(47, 79, 79) + "darkturquoise": {0x00, 0xce, 0xd1, 0xff}, // rgb(0, 206, 209) + "darkviolet": {0x94, 0x00, 0xd3, 0xff}, // rgb(148, 0, 211) + "deeppink": {0xff, 0x14, 0x93, 0xff}, // rgb(255, 20, 147) + "deepskyblue": {0x00, 0xbf, 0xff, 0xff}, // rgb(0, 191, 255) + "dimgray": {0x69, 0x69, 0x69, 0xff}, // rgb(105, 105, 105) + "dimgrey": {0x69, 0x69, 0x69, 0xff}, // rgb(105, 105, 105) + "dodgerblue": {0x1e, 0x90, 0xff, 0xff}, // rgb(30, 144, 255) + "firebrick": {0xb2, 0x22, 0x22, 0xff}, // rgb(178, 34, 34) + "floralwhite": {0xff, 0xfa, 0xf0, 0xff}, // rgb(255, 250, 240) + "forestgreen": {0x22, 0x8b, 0x22, 0xff}, // rgb(34, 139, 34) + "fuchsia": {0xff, 0x00, 0xff, 0xff}, // rgb(255, 0, 255) + "gainsboro": {0xdc, 0xdc, 0xdc, 0xff}, // rgb(220, 220, 220) + "ghostwhite": {0xf8, 0xf8, 0xff, 0xff}, // rgb(248, 248, 255) + "gold": {0xff, 0xd7, 0x00, 0xff}, // rgb(255, 215, 0) + "goldenrod": {0xda, 0xa5, 0x20, 0xff}, // rgb(218, 165, 32) + "gray": {0x80, 0x80, 0x80, 0xff}, // rgb(128, 128, 128) + "green": {0x00, 0x80, 0x00, 0xff}, // rgb(0, 128, 0) + "greenyellow": {0xad, 0xff, 0x2f, 0xff}, // rgb(173, 255, 47) + "grey": {0x80, 0x80, 0x80, 0xff}, // rgb(128, 128, 128) + "honeydew": {0xf0, 0xff, 0xf0, 0xff}, // rgb(240, 255, 240) + "hotpink": {0xff, 0x69, 0xb4, 0xff}, // rgb(255, 105, 180) + "indianred": {0xcd, 0x5c, 0x5c, 0xff}, // rgb(205, 92, 92) + "indigo": {0x4b, 0x00, 0x82, 0xff}, // rgb(75, 0, 130) + "ivory": {0xff, 0xff, 0xf0, 0xff}, // rgb(255, 255, 240) + "khaki": {0xf0, 0xe6, 0x8c, 0xff}, // rgb(240, 230, 140) + "lavender": {0xe6, 0xe6, 0xfa, 0xff}, // rgb(230, 230, 250) + "lavenderblush": {0xff, 0xf0, 0xf5, 0xff}, // rgb(255, 240, 245) + "lawngreen": {0x7c, 0xfc, 0x00, 0xff}, // rgb(124, 252, 0) + "lemonchiffon": {0xff, 0xfa, 0xcd, 0xff}, // rgb(255, 250, 205) + "lightblue": {0xad, 0xd8, 0xe6, 0xff}, // rgb(173, 216, 230) + "lightcoral": {0xf0, 0x80, 0x80, 0xff}, // rgb(240, 128, 128) + "lightcyan": {0xe0, 0xff, 0xff, 0xff}, // rgb(224, 255, 255) + "lightgoldenrodyellow": {0xfa, 0xfa, 0xd2, 0xff}, // rgb(250, 250, 210) + "lightgray": {0xd3, 0xd3, 0xd3, 0xff}, // rgb(211, 211, 211) + "lightgreen": {0x90, 0xee, 0x90, 0xff}, // rgb(144, 238, 144) + "lightgrey": {0xd3, 0xd3, 0xd3, 0xff}, // rgb(211, 211, 211) + "lightpink": {0xff, 0xb6, 0xc1, 0xff}, // rgb(255, 182, 193) + "lightsalmon": {0xff, 0xa0, 0x7a, 0xff}, // rgb(255, 160, 122) + "lightseagreen": {0x20, 0xb2, 0xaa, 0xff}, // rgb(32, 178, 170) + "lightskyblue": {0x87, 0xce, 0xfa, 0xff}, // rgb(135, 206, 250) + "lightslategray": {0x77, 0x88, 0x99, 0xff}, // rgb(119, 136, 153) + "lightslategrey": {0x77, 0x88, 0x99, 0xff}, // rgb(119, 136, 153) + "lightsteelblue": {0xb0, 0xc4, 0xde, 0xff}, // rgb(176, 196, 222) + "lightyellow": {0xff, 0xff, 0xe0, 0xff}, // rgb(255, 255, 224) + "lime": {0x00, 0xff, 0x00, 0xff}, // rgb(0, 255, 0) + "limegreen": {0x32, 0xcd, 0x32, 0xff}, // rgb(50, 205, 50) + "linen": {0xfa, 0xf0, 0xe6, 0xff}, // rgb(250, 240, 230) + "magenta": {0xff, 0x00, 0xff, 0xff}, // rgb(255, 0, 255) + "maroon": {0x80, 0x00, 0x00, 0xff}, // rgb(128, 0, 0) + "mediumaquamarine": {0x66, 0xcd, 0xaa, 0xff}, // rgb(102, 205, 170) + "mediumblue": {0x00, 0x00, 0xcd, 0xff}, // rgb(0, 0, 205) + "mediumorchid": {0xba, 0x55, 0xd3, 0xff}, // rgb(186, 85, 211) + "mediumpurple": {0x93, 0x70, 0xdb, 0xff}, // rgb(147, 112, 219) + "mediumseagreen": {0x3c, 0xb3, 0x71, 0xff}, // rgb(60, 179, 113) + "mediumslateblue": {0x7b, 0x68, 0xee, 0xff}, // rgb(123, 104, 238) + "mediumspringgreen": {0x00, 0xfa, 0x9a, 0xff}, // rgb(0, 250, 154) + "mediumturquoise": {0x48, 0xd1, 0xcc, 0xff}, // rgb(72, 209, 204) + "mediumvioletred": {0xc7, 0x15, 0x85, 0xff}, // rgb(199, 21, 133) + "midnightblue": {0x19, 0x19, 0x70, 0xff}, // rgb(25, 25, 112) + "mintcream": {0xf5, 0xff, 0xfa, 0xff}, // rgb(245, 255, 250) + "mistyrose": {0xff, 0xe4, 0xe1, 0xff}, // rgb(255, 228, 225) + "moccasin": {0xff, 0xe4, 0xb5, 0xff}, // rgb(255, 228, 181) + "navajowhite": {0xff, 0xde, 0xad, 0xff}, // rgb(255, 222, 173) + "navy": {0x00, 0x00, 0x80, 0xff}, // rgb(0, 0, 128) + "oldlace": {0xfd, 0xf5, 0xe6, 0xff}, // rgb(253, 245, 230) + "olive": {0x80, 0x80, 0x00, 0xff}, // rgb(128, 128, 0) + "olivedrab": {0x6b, 0x8e, 0x23, 0xff}, // rgb(107, 142, 35) + "orange": {0xff, 0xa5, 0x00, 0xff}, // rgb(255, 165, 0) + "orangered": {0xff, 0x45, 0x00, 0xff}, // rgb(255, 69, 0) + "orchid": {0xda, 0x70, 0xd6, 0xff}, // rgb(218, 112, 214) + "palegoldenrod": {0xee, 0xe8, 0xaa, 0xff}, // rgb(238, 232, 170) + "palegreen": {0x98, 0xfb, 0x98, 0xff}, // rgb(152, 251, 152) + "paleturquoise": {0xaf, 0xee, 0xee, 0xff}, // rgb(175, 238, 238) + "palevioletred": {0xdb, 0x70, 0x93, 0xff}, // rgb(219, 112, 147) + "papayawhip": {0xff, 0xef, 0xd5, 0xff}, // rgb(255, 239, 213) + "peachpuff": {0xff, 0xda, 0xb9, 0xff}, // rgb(255, 218, 185) + "peru": {0xcd, 0x85, 0x3f, 0xff}, // rgb(205, 133, 63) + "pink": {0xff, 0xc0, 0xcb, 0xff}, // rgb(255, 192, 203) + "plum": {0xdd, 0xa0, 0xdd, 0xff}, // rgb(221, 160, 221) + "powderblue": {0xb0, 0xe0, 0xe6, 0xff}, // rgb(176, 224, 230) + "purple": {0x80, 0x00, 0x80, 0xff}, // rgb(128, 0, 128) + "red": {0xff, 0x00, 0x00, 0xff}, // rgb(255, 0, 0) + "rosybrown": {0xbc, 0x8f, 0x8f, 0xff}, // rgb(188, 143, 143) + "royalblue": {0x41, 0x69, 0xe1, 0xff}, // rgb(65, 105, 225) + "saddlebrown": {0x8b, 0x45, 0x13, 0xff}, // rgb(139, 69, 19) + "salmon": {0xfa, 0x80, 0x72, 0xff}, // rgb(250, 128, 114) + "sandybrown": {0xf4, 0xa4, 0x60, 0xff}, // rgb(244, 164, 96) + "seagreen": {0x2e, 0x8b, 0x57, 0xff}, // rgb(46, 139, 87) + "seashell": {0xff, 0xf5, 0xee, 0xff}, // rgb(255, 245, 238) + "sienna": {0xa0, 0x52, 0x2d, 0xff}, // rgb(160, 82, 45) + "silver": {0xc0, 0xc0, 0xc0, 0xff}, // rgb(192, 192, 192) + "skyblue": {0x87, 0xce, 0xeb, 0xff}, // rgb(135, 206, 235) + "slateblue": {0x6a, 0x5a, 0xcd, 0xff}, // rgb(106, 90, 205) + "slategray": {0x70, 0x80, 0x90, 0xff}, // rgb(112, 128, 144) + "slategrey": {0x70, 0x80, 0x90, 0xff}, // rgb(112, 128, 144) + "snow": {0xff, 0xfa, 0xfa, 0xff}, // rgb(255, 250, 250) + "springgreen": {0x00, 0xff, 0x7f, 0xff}, // rgb(0, 255, 127) + "steelblue": {0x46, 0x82, 0xb4, 0xff}, // rgb(70, 130, 180) + "tan": {0xd2, 0xb4, 0x8c, 0xff}, // rgb(210, 180, 140) + "teal": {0x00, 0x80, 0x80, 0xff}, // rgb(0, 128, 128) + "thistle": {0xd8, 0xbf, 0xd8, 0xff}, // rgb(216, 191, 216) + "tomato": {0xff, 0x63, 0x47, 0xff}, // rgb(255, 99, 71) + "turquoise": {0x40, 0xe0, 0xd0, 0xff}, // rgb(64, 224, 208) + "violet": {0xee, 0x82, 0xee, 0xff}, // rgb(238, 130, 238) + "wheat": {0xf5, 0xde, 0xb3, 0xff}, // rgb(245, 222, 179) + "white": {0xff, 0xff, 0xff, 0xff}, // rgb(255, 255, 255) + "whitesmoke": {0xf5, 0xf5, 0xf5, 0xff}, // rgb(245, 245, 245) + "yellow": {0xff, 0xff, 0x00, 0xff}, // rgb(255, 255, 0) + "yellowgreen": {0x9a, 0xcd, 0x32, 0xff}, // rgb(154, 205, 50) +} diff --git a/ui/messages/html/entity.go b/ui/messages/html/entity.go new file mode 100644 index 0000000..2ce37a8 --- /dev/null +++ b/ui/messages/html/entity.go @@ -0,0 +1,312 @@ +// gomuks - A terminal Matrix client written in Go. +// Copyright (C) 2019 Tulir Asokan +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +package html + +import ( + "fmt" + "regexp" + "strings" + + "github.com/mattn/go-runewidth" + + "maunium.net/go/gomuks/ui/widget" + "maunium.net/go/mauview" + "maunium.net/go/tcell" +) + +// AdjustStyleFunc is a lambda function type to edit an existing tcell Style. +type AdjustStyleFunc func(tcell.Style) tcell.Style + +type Entity interface { + // AdjustStyle recursively changes the style of the entity and all its children. + AdjustStyle(AdjustStyleFunc) Entity + // Draw draws the entity onto the given mauview Screen. + Draw(screen mauview.Screen) + // IsBlock returns whether or not it's a block-type entity. + IsBlock() bool + // GetTag returns the HTML tag of the entity. + GetTag() string + // PlainText returns the plaintext content in the entity and all its children. + PlainText() string + // String returns a string representation of the entity struct. + String() string + // Clone creates a deep copy of the entity. + Clone() Entity + + // Height returns the render height of the entity. + Height() int + // CalculateBuffer prepares the entity and all its children for rendering with the given parameters + CalculateBuffer(width, startX int, bare bool) int + + getStartX() int +} + +type BaseEntity struct { + // The HTML tag of this entity. + Tag string + // Text in this entity. + Text string + // Style for this entity. + Style tcell.Style + // Child entities. + Children []Entity + // Whether or not this is a block-type entity. + Block bool + // Number of cells to indent children. + Indent int + + // Height to use for entity if both text and children are empty. + DefaultHeight int + + buffer []string + prevWidth int + startX int + height int +} + +// NewTextEntity creates a new text-only Entity. +func NewTextEntity(text string) *BaseEntity { + return &BaseEntity{ + Tag: "text", + Text: text, + } +} + +// AdjustStyle recursively changes the style of this entity and all its children. +func (he *BaseEntity) AdjustStyle(fn AdjustStyleFunc) Entity { + for _, child := range he.Children { + child.AdjustStyle(fn) + } + he.Style = fn(he.Style) + return he +} + +// IsBlock returns whether or not this is a block-type entity. +func (he *BaseEntity) IsBlock() bool { + return he.Block +} + +// GetTag returns the HTML tag of this entity. +func (he *BaseEntity) GetTag() string { + return he.Tag +} + +// Height returns the render height of this entity. +func (he *BaseEntity) Height() int { + return he.height +} + +func (he *BaseEntity) getStartX() int { + return he.startX +} + +// Clone creates a deep copy of this entity. +func (he *BaseEntity) Clone() Entity { + children := make([]Entity, len(he.Children)) + for i, child := range he.Children { + children[i] = child.Clone() + } + return &BaseEntity{ + Tag: he.Tag, + Text: he.Text, + Style: he.Style, + Children: children, + Block: he.Block, + Indent: he.Indent, + DefaultHeight: he.DefaultHeight, + } +} + +// String returns a textual representation of this BaseEntity struct. +func (he *BaseEntity) String() string { + var buf strings.Builder + buf.WriteString("&html.BaseEntity{\n") + _, _ = fmt.Fprintf(&buf, ` Tag="%s", Style=%d, Block=%t, Indent=%d, startX=%d, height=%d,`, + he.Tag, he.Style, he.Block, he.Indent, he.startX, he.height) + buf.WriteRune('\n') + _, _ = fmt.Fprintf(&buf, ` Buffer=["%s"]`, strings.Join(he.buffer, "\", \"")) + if len(he.Text) > 0 { + buf.WriteString(",\n") + _, _ = fmt.Fprintf(&buf, ` Text="%s"`, he.Text) + } + if len(he.Children) > 0 { + buf.WriteString(",\n") + buf.WriteString(" Children={") + for _, child := range he.Children { + buf.WriteString("\n ") + buf.WriteString(strings.Join(strings.Split(strings.TrimRight(child.String(), "\n"), "\n"), "\n ")) + } + buf.WriteString("\n },") + } + buf.WriteString("\n},\n") + return buf.String() +} + +// PlainText returns the plaintext content in this entity and all its children. +func (he *BaseEntity) PlainText() string { + if len(he.Children) == 0 { + return he.Text + } + var buf strings.Builder + buf.WriteString(he.Text) + newlined := false + for _, child := range he.Children { + if child.IsBlock() && !newlined { + buf.WriteRune('\n') + } + newlined = false + buf.WriteString(child.PlainText()) + if child.IsBlock() { + buf.WriteRune('\n') + newlined = true + } + } + return buf.String() +} + +// Draw draws this entity onto the given mauview Screen. +func (he *BaseEntity) Draw(screen mauview.Screen) { + width, _ := screen.Size() + if len(he.buffer) > 0 { + x := he.startX + for y, line := range he.buffer { + widget.WriteLine(screen, mauview.AlignLeft, line, x, y, width, he.Style) + x = 0 + } + } + if len(he.Children) > 0 { + prevBreak := false + proxyScreen := &mauview.ProxyScreen{Parent: screen, OffsetX: he.Indent, Width: width - he.Indent, Style: he.Style} + for i, entity := range he.Children { + if i != 0 && entity.getStartX() == 0 { + proxyScreen.OffsetY++ + } + proxyScreen.Height = entity.Height() + entity.Draw(proxyScreen) + proxyScreen.SetStyle(he.Style) + proxyScreen.OffsetY += entity.Height() - 1 + _, isBreak := entity.(*BreakEntity) + if prevBreak && isBreak { + proxyScreen.OffsetY++ + } + prevBreak = isBreak + } + } +} + +// CalculateBuffer prepares this entity and all its children for rendering with the given parameters +func (he *BaseEntity) CalculateBuffer(width, startX int, bare bool) int { + he.startX = startX + if he.Block { + he.startX = 0 + } + he.height = 0 + if len(he.Children) > 0 { + childStartX := he.startX + prevBreak := false + for _, entity := range he.Children { + if entity.IsBlock() || childStartX == 0 || he.height == 0 { + he.height++ + } + childStartX = entity.CalculateBuffer(width-he.Indent, childStartX, bare) + he.height += entity.Height() - 1 + _, isBreak := entity.(*BreakEntity) + if prevBreak && isBreak { + he.height++ + } + prevBreak = isBreak + } + if len(he.Text) == 0 && !he.Block { + return childStartX + } + } + if len(he.Text) > 0 { + he.prevWidth = width + if he.buffer == nil { + he.buffer = []string{} + } + bufPtr := 0 + text := he.Text + textStartX := he.startX + for { + // TODO add option no wrap and character wrap options + extract := runewidth.Truncate(text, width-textStartX, "") + extract, wordWrapped := trim(extract, text, bare) + if !wordWrapped && textStartX > 0 { + if bufPtr < len(he.buffer) { + he.buffer[bufPtr] = "" + } else { + he.buffer = append(he.buffer, "") + } + bufPtr++ + textStartX = 0 + continue + } + if bufPtr < len(he.buffer) { + he.buffer[bufPtr] = extract + } else { + he.buffer = append(he.buffer, extract) + } + bufPtr++ + text = text[len(extract):] + if len(text) == 0 { + he.buffer = he.buffer[:bufPtr] + he.height += len(he.buffer) + // This entity is over, return the startX for the next entity + if he.Block { + // ...except if it's a block entity + return 0 + } + return textStartX + runewidth.StringWidth(extract) + } + textStartX = 0 + } + } + if len(he.Text) == 0 && len(he.Children) == 0 { + he.height = he.DefaultHeight + } + return he.startX +} + +var ( + boundaryPattern = regexp.MustCompile(`([[:punct:]]\s*|\s+)`) + bareBoundaryPattern = regexp.MustCompile(`(\s+)`) + spacePattern = regexp.MustCompile(`\s+`) +) + +func trim(extract, full string, bare bool) (string, bool) { + if len(extract) == len(full) { + return extract, true + } + if spaces := spacePattern.FindStringIndex(full[len(extract):]); spaces != nil && spaces[0] == 0 { + extract = full[:len(extract)+spaces[1]] + } + regex := boundaryPattern + if bare { + regex = bareBoundaryPattern + } + matches := regex.FindAllStringIndex(extract, -1) + if len(matches) > 0 { + if match := matches[len(matches)-1]; len(match) >= 2 { + if until := match[1]; until < len(extract) { + extract = extract[:until] + return extract, true + } + } + } + return extract, len(extract) > 0 && extract[len(extract)-1] == ' ' +} diff --git a/ui/messages/html/list.go b/ui/messages/html/list.go new file mode 100644 index 0000000..9f45b92 --- /dev/null +++ b/ui/messages/html/list.go @@ -0,0 +1,80 @@ +// gomuks - A terminal Matrix client written in Go. +// Copyright (C) 2019 Tulir Asokan +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +package html + +import ( + "fmt" + "math" + "strings" + + "maunium.net/go/gomuks/ui/widget" + "maunium.net/go/mauview" +) + +type ListEntity struct { + *BaseEntity + Ordered bool + Start int +} + +func digits(num int) int { + if num <= 0 { + return 0 + } + return int(math.Floor(math.Log10(float64(num))) + 1) +} + +func NewListEntity(ordered bool, start int, children []Entity) *ListEntity { + entity := &ListEntity{ + BaseEntity: &BaseEntity{ + Tag: "ul", + Children: children, + Block: true, + Indent: 2, + }, + Ordered: ordered, + Start: start, + } + if ordered { + entity.Tag = "ol" + entity.Indent += digits(start + len(children) - 1) + } + return entity +} + +func (le *ListEntity) Draw(screen mauview.Screen) { + width, _ := screen.Size() + + proxyScreen := &mauview.ProxyScreen{Parent: screen, OffsetX: le.Indent, Width: width - le.Indent, Style: le.Style} + for i, entity := range le.Children { + proxyScreen.Height = entity.Height() + if le.Ordered { + number := le.Start + i + line := fmt.Sprintf("%d. %s", number, strings.Repeat(" ", le.Indent-2-digits(number))) + widget.WriteLine(screen, mauview.AlignLeft, line, 0, proxyScreen.OffsetY, le.Indent, le.Style) + } else { + screen.SetContent(0, proxyScreen.OffsetY, '●', nil, le.Style) + } + entity.Draw(proxyScreen) + proxyScreen.SetStyle(le.Style) + proxyScreen.OffsetY += entity.Height() + } +} + +func (le *ListEntity) String() string { + return fmt.Sprintf("&html.ListEntity{Ordered=%t, Start=%d, Base=%s},\n", le.Ordered, le.Start, le.BaseEntity) +} diff --git a/ui/messages/html/parser.go b/ui/messages/html/parser.go new file mode 100644 index 0000000..dbd487e --- /dev/null +++ b/ui/messages/html/parser.go @@ -0,0 +1,380 @@ +// gomuks - A terminal Matrix client written in Go. +// Copyright (C) 2019 Tulir Asokan +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +package html + +import ( + "regexp" + "strconv" + "strings" + + "github.com/alecthomas/chroma" + "github.com/alecthomas/chroma/lexers" + "github.com/alecthomas/chroma/styles" + "github.com/lucasb-eyer/go-colorful" + "golang.org/x/net/html" + + "maunium.net/go/mautrix" + "maunium.net/go/tcell" + + "maunium.net/go/gomuks/matrix/rooms" + "maunium.net/go/gomuks/ui/widget" +) + +var matrixToURL = regexp.MustCompile("^(?:https?://)?(?:www\\.)?matrix\\.to/#/([#@!].*)") + +type htmlParser struct { + room *rooms.Room + + keepLinebreak bool +} + +func AdjustStyleBold(style tcell.Style) tcell.Style { + return style.Bold(true) +} + +func AdjustStyleItalic(style tcell.Style) tcell.Style { + return style.Italic(true) +} + +func AdjustStyleUnderline(style tcell.Style) tcell.Style { + return style.Underline(true) +} + +func AdjustStyleStrikethrough(style tcell.Style) tcell.Style { + return style.Strikethrough(true) +} + +func AdjustStyleTextColor(color tcell.Color) func(tcell.Style) tcell.Style { + return func(style tcell.Style) tcell.Style { + return style.Foreground(color) + } +} + +func AdjustStyleBackgroundColor(color tcell.Color) func(tcell.Style) tcell.Style { + return func(style tcell.Style) tcell.Style { + return style.Background(color) + } +} + +func (parser *htmlParser) getAttribute(node *html.Node, attribute string) string { + for _, attr := range node.Attr { + if attr.Key == attribute { + return attr.Val + } + } + return "" +} + +func (parser *htmlParser) listToEntity(node *html.Node) Entity { + children := parser.nodeToEntities(node.FirstChild) + ordered := node.Data == "ol" + start := 1 + if ordered { + if startRaw := parser.getAttribute(node, "start"); len(startRaw) > 0 { + var err error + start, err = strconv.Atoi(startRaw) + if err != nil { + start = 1 + } + } + } + listItems := children[:0] + for _, child := range children { + if child.GetTag() == "li" { + listItems = append(listItems, child) + } + } + return NewListEntity(ordered, start, listItems) +} + +func (parser *htmlParser) basicFormatToEntity(node *html.Node) Entity { + entity := &BaseEntity{ + Tag: node.Data, + Children: parser.nodeToEntities(node.FirstChild), + } + switch node.Data { + case "b", "strong": + entity.AdjustStyle(AdjustStyleBold) + case "i", "em": + entity.AdjustStyle(AdjustStyleItalic) + case "s", "del": + entity.AdjustStyle(AdjustStyleStrikethrough) + case "u", "ins": + entity.AdjustStyle(AdjustStyleUnderline) + case "font": + fgColor, ok := parser.parseColor(node, "data-mx-color", "color") + if ok { + entity.AdjustStyle(AdjustStyleTextColor(fgColor)) + } + bgColor, ok := parser.parseColor(node, "data-mx-bg-color", "background-color") + if ok { + entity.AdjustStyle(AdjustStyleBackgroundColor(bgColor)) + } + } + return entity +} + +func (parser *htmlParser) parseColor(node *html.Node, mainName, altName string) (color tcell.Color, ok bool) { + hex := parser.getAttribute(node, mainName) + if len(hex) == 0 { + hex = parser.getAttribute(node, altName) + if len(hex) == 0 { + return + } + } + + cful, err := colorful.Hex(hex) + if err != nil { + color2, found := colorMap[strings.ToLower(hex)] + if !found { + return + } + cful, _ = colorful.MakeColor(color2) + } + + r, g, b := cful.RGB255() + return tcell.NewRGBColor(int32(r), int32(g), int32(b)), true +} + +func (parser *htmlParser) headerToEntity(node *html.Node) Entity { + length := int(node.Data[1] - '0') + prefix := strings.Repeat("#", length) + " " + return (&BaseEntity{ + Tag: node.Data, + Text: prefix, + Children: parser.nodeToEntities(node.FirstChild), + }).AdjustStyle(AdjustStyleBold) +} + +func (parser *htmlParser) blockquoteToEntity(node *html.Node) Entity { + return NewBlockquoteEntity(parser.nodeToEntities(node.FirstChild)) +} + +func (parser *htmlParser) linkToEntity(node *html.Node) Entity { + entity := &BaseEntity{ + Tag: "a", + Children: parser.nodeToEntities(node.FirstChild), + } + href := parser.getAttribute(node, "href") + if len(href) == 0 { + return entity + } + match := matrixToURL.FindStringSubmatch(href) + if len(match) == 2 { + entity.Children = nil + pillTarget := match[1] + entity.Text = pillTarget + if pillTarget[0] == '@' { + if member := parser.room.GetMember(pillTarget); member != nil { + entity.Text = member.Displayname + entity.Style = entity.Style.Foreground(widget.GetHashColor(pillTarget)) + } + } + } + // TODO add click action and underline on hover for links + return entity +} + +func (parser *htmlParser) imageToEntity(node *html.Node) Entity { + alt := parser.getAttribute(node, "alt") + if len(alt) == 0 { + alt = parser.getAttribute(node, "title") + if len(alt) == 0 { + alt = "[inline image]" + } + } + entity := &BaseEntity{ + Tag: "img", + Text: alt, + } + // TODO add click action and underline on hover for inline images + return entity +} + +func colourToColor(colour chroma.Colour) tcell.Color { + if !colour.IsSet() { + return tcell.ColorDefault + } + return tcell.NewRGBColor(int32(colour.Red()), int32(colour.Green()), int32(colour.Blue())) +} + +func styleEntryToStyle(se chroma.StyleEntry) tcell.Style { + return tcell.StyleDefault. + Bold(se.Bold == chroma.Yes). + Italic(se.Italic == chroma.Yes). + Underline(se.Underline == chroma.Yes). + Foreground(colourToColor(se.Colour)). + Background(colourToColor(se.Background)) +} + +func (parser *htmlParser) syntaxHighlight(text, language string) Entity { + lexer := lexers.Get(strings.ToLower(language)) + if lexer == nil { + return nil + } + iter, err := lexer.Tokenise(nil, text) + if err != nil { + return nil + } + // TODO allow changing theme + style := styles.SolarizedDark + + tokens := iter.Tokens() + children := make([]Entity, len(tokens)) + for i, token := range tokens { + if token.Value == "\n" { + children[i] = &BaseEntity{Block: true, Tag: "br"} + } else { + children[i] = &BaseEntity{ + Tag: token.Type.String(), + Text: token.Value, + Style: styleEntryToStyle(style.Get(token.Type)), + + DefaultHeight: 1, + } + } + } + return NewCodeBlockEntity(children, styleEntryToStyle(style.Get(chroma.Background))) +} + +func (parser *htmlParser) codeblockToEntity(node *html.Node) Entity { + lang := "plaintext" + // TODO allow disabling syntax highlighting + if node.FirstChild.Type == html.ElementNode && node.FirstChild.Data == "code" { + node = node.FirstChild + attr := parser.getAttribute(node, "class") + for _, class := range strings.Split(attr, " ") { + if strings.HasPrefix(class, "language-") { + lang = class[len("language-"):] + break + } + } + } + parser.keepLinebreak = true + text := (&BaseEntity{ + Children: parser.nodeToEntities(node.FirstChild), + }).PlainText() + parser.keepLinebreak = false + return parser.syntaxHighlight(text, lang) +} + +func (parser *htmlParser) tagNodeToEntity(node *html.Node) Entity { + switch node.Data { + case "blockquote": + return parser.blockquoteToEntity(node) + case "ol", "ul": + return parser.listToEntity(node) + case "h1", "h2", "h3", "h4", "h5", "h6": + return parser.headerToEntity(node) + case "br": + return NewBreakEntity() + case "b", "strong", "i", "em", "s", "del", "u", "ins", "font": + return parser.basicFormatToEntity(node) + case "a": + return parser.linkToEntity(node) + case "img": + return parser.imageToEntity(node) + case "pre": + return parser.codeblockToEntity(node) + default: + return &BaseEntity{ + Tag: node.Data, + Children: parser.nodeToEntities(node.FirstChild), + Block: parser.isBlockTag(node.Data), + } + } +} + +func (parser *htmlParser) singleNodeToEntity(node *html.Node) Entity { + switch node.Type { + case html.TextNode: + if !parser.keepLinebreak { + node.Data = strings.ReplaceAll(node.Data, "\n", "") + } + return &BaseEntity{ + Tag: "text", + Text: node.Data, + } + case html.ElementNode: + return parser.tagNodeToEntity(node) + case html.DocumentNode: + if node.FirstChild.Data == "html" && node.FirstChild.NextSibling == nil { + return parser.singleNodeToEntity(node.FirstChild) + } + return &BaseEntity{ + Tag: "html", + Children: parser.nodeToEntities(node.FirstChild), + Block: true, + } + default: + return nil + } +} + +func (parser *htmlParser) nodeToEntities(node *html.Node) (entities []Entity) { + for ; node != nil; node = node.NextSibling { + if entity := parser.singleNodeToEntity(node); entity != nil { + entities = append(entities, entity) + } + } + return +} + +var BlockTags = []string{"p", "h1", "h2", "h3", "h4", "h5", "h6", "ol", "ul", "li", "pre", "blockquote", "div", "hr", "table"} + +func (parser *htmlParser) isBlockTag(tag string) bool { + for _, blockTag := range BlockTags { + if tag == blockTag { + return true + } + } + return false +} + +func (parser *htmlParser) Parse(htmlData string) Entity { + node, _ := html.Parse(strings.NewReader(htmlData)) + return parser.singleNodeToEntity(node) +} + +const TabLength = 4 + +// Parse parses a HTML-formatted Matrix event into a UIMessage. +func Parse(room *rooms.Room, evt *mautrix.Event, senderDisplayname string) Entity { + htmlData := evt.Content.FormattedBody + if evt.Content.Format != mautrix.FormatHTML { + htmlData = strings.ReplaceAll(html.EscapeString(evt.Content.Body), "\n", "<br/>") + } + htmlData = strings.Replace(htmlData, "\t", strings.Repeat(" ", TabLength), -1) + + parser := htmlParser{room: room} + root := parser.Parse(htmlData) + root.(*BaseEntity).Block = false + + if evt.Content.MsgType == mautrix.MsgEmote { + root = &BaseEntity{ + Tag: "emote", + Children: []Entity{ + NewTextEntity("* "), + NewTextEntity(senderDisplayname).AdjustStyle(AdjustStyleTextColor(widget.GetHashColor(evt.Sender))), + NewTextEntity(" "), + root, + }, + } + } + + return root +} |