gomuks/ui/help-modal.go
Kasper Seweryn 2e5eeb22ed Fix #122
2020-09-08 00:49:25 +00:00

206 lines
4.8 KiB
Go

package ui
import (
"strings"
"maunium.net/go/mauview"
"maunium.net/go/tcell"
)
type HelpModal struct {
mauview.Component
container *mauview.Box
text *mauview.TextView
scrollX int
scrollY int
maxScrollX int
maxScrollY int
textWidth int
textHeight int
parent *MainView
}
// There are only math.Min/math.Max for float64
func Max(a int, b int) int {
if a > b {
return a
}
return b
}
func Min(a int, b int) int {
if a < b {
return a
}
return b
}
func NewHelpModal(parent *MainView) *HelpModal {
hm := &HelpModal{
parent: parent,
scrollX: 0,
scrollY: 0,
maxScrollX: 0,
maxScrollY: 0,
}
helpText := `# General
/help - Show this "temporary" help message.
/quit - Quit gomuks.
/clearcache - Clear cache and quit gomuks.
/logout - Log out of Matrix.
/toggle <thing> - Temporary command to toggle various UI features.
Things: rooms, users, baremessages, images, typingnotif, unverified
# Sending special messages
/me <message> - Send an emote message.
/notice <message> - Send a notice (generally used for bot messages).
/rainbow <message> - Send rainbow text (markdown not supported).
/rainbowme <message> - Send rainbow text in an emote.
/reply [text] - Reply to the selected message.
/react <reaction> - React to the selected message.
/redact [reason] - Redact the selected message.
/edit - Edit the selected message.
# Encryption
/fingerprint - View the fingerprint of your device.
/devices <user id> - View the device list of a user.
/device <user id> <device id> - Show info about a specific device.
/unverify <user id> <device id> - Un-verify a device.
/blacklist <user id> <device id> - Blacklist a device.
/verify <user id> <device id> [fingerprint]
- Verify a device. If the fingerprint is not provided,
interactive emoji verification will be started.
/reset-session - Reset the outbound Megolm session in the current room.
/import <file> - Import encryption keys
/export <file> - Export encryption keys
/export-room <file> - Export encryption keys for the current room.
# Rooms
/pm <user id> <...> - Create a private chat with the given user(s).
/create [room name] - Create a room.
/join <room> [server] - Join a room.
/accept - Accept the invite.
/reject - Reject the invite.
/invite <user id> - Invite the given user to the room.
/roomnick <name> - Change your per-room displayname.
/tag <tag> <priority> - Add the room to <tag>.
/untag <tag> - Remove the room from <tag>.
/tags - List the tags the room is in.
/alias <act> <name> - Add or remove local addresses.
/leave - Leave the current room.
/kick <user id> [reason] - Kick a user.
/ban <user id> [reason] - Ban a user.
/unban <user id> - Unban a user.`
split := strings.Split(helpText, "\n")
hm.textHeight = len(split)
hm.textWidth = 0
for _, line := range split {
hm.textWidth = Max(hm.textWidth, len(line))
}
hm.text = mauview.NewTextView().
SetText(helpText).
SetScrollable(true).
SetWrap(false)
flex := mauview.NewFlex().
SetDirection(mauview.FlexRow).
AddProportionalComponent(hm.text, 1)
hm.container = mauview.NewBox(flex).
SetBorder(true).
SetTitle("Help").
SetBlurCaptureFunc(func() bool {
hm.parent.HideModal()
return true
})
hm.Component = mauview.Center(hm.container, 0, 0).
SetAlwaysFocusChild(true)
return hm
}
func (hm *HelpModal) Focus() {
hm.container.Focus()
}
func (hm *HelpModal) Blur() {
hm.container.Blur()
}
func (hm *HelpModal) Draw(screen mauview.Screen) {
width, height := screen.Size()
width /= 2
if width < 42 {
width = 42
}
if height > 40 {
height -= 20
} else if height > 30 {
height -= 10
} else if height > 20 {
height -= 5
}
oldMaxScrollY := hm.maxScrollY
hm.maxScrollY = hm.textHeight - height + 2
hm.maxScrollX = hm.textWidth - width + 2
if hm.maxScrollY != oldMaxScrollY {
// Reset the scroll
// NOTE: Workarounds a problem where we can no longer scroll
// due to hm.scrollY being too big.
hm.scrollY = 0
hm.scrollX = 0
hm.text.ScrollTo(hm.scrollY, hm.scrollX)
}
hm.Component = mauview.Center(hm.container, width, height).
SetAlwaysFocusChild(true)
hm.Component.Draw(screen)
}
func (hm *HelpModal) OnKeyEvent(event mauview.KeyEvent) bool {
switch event.Key() {
case tcell.KeyUp:
hm.scrollY = Max(0, hm.scrollY-1)
hm.text.ScrollTo(hm.scrollY, hm.scrollX)
return true
case tcell.KeyDown:
hm.scrollY = Min(hm.maxScrollY, hm.scrollY+1)
hm.text.ScrollTo(hm.scrollY, hm.scrollX)
return true
case tcell.KeyLeft:
hm.scrollX = Max(0, hm.scrollX-1)
hm.text.ScrollTo(hm.scrollY, hm.scrollX)
return true
case tcell.KeyRight:
hm.scrollX = Min(hm.maxScrollX, hm.scrollX+1)
hm.text.ScrollTo(hm.scrollY, hm.scrollX)
return true
}
hm.parent.HideModal()
return true
}