82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
package imgview
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import (
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"net/url"
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"path"
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"strings"
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"github.com/diamondburned/cchat-gtk/internal/gts/httputil"
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"github.com/diamondburned/cchat-gtk/internal/ui/primitives"
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"github.com/diamondburned/cchat-gtk/internal/ui/rich/parser"
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"github.com/gotk3/gotk3/gdk"
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"github.com/gotk3/gotk3/gtk"
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)
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const (
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MaxWidth = 350
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MaxHeight = 350
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)
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type WidgetConnector interface {
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gtk.IWidget
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primitives.Connector
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}
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var _ WidgetConnector = (*gtk.Label)(nil)
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func BindTooltip(connector WidgetConnector) {
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// This implementation doesn't seem like a good idea. First off, is the
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// closure really garbage collected? If it's not, then we have some huge
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// issues. Second, if the closure is garbage collected, then when? If it's
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// not garbage collecteed, then not only are we leaking 2 float64s per
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// message, but we're also keeping alive the widget.
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var x, y float64
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connector.Connect("motion-notify-event", func(w gtk.IWidget, ev *gdk.Event) {
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x, y = gdk.EventMotionNewFromEvent(ev).MotionVal()
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})
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connector.Connect("activate-link", func(c WidgetConnector, uri string) bool {
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switch ext(uri) {
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case ".jpg", ".jpeg", ".png", ".webp", ".gif":
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// Make a new rectangle to use in the popover.
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r := gdk.Rectangle{}
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r.SetX(int(x))
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r.SetY(int(y))
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// Make a new image that's asynchronously fetched.
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img, _ := gtk.ImageNewFromIconName("image-loading", gtk.ICON_SIZE_BUTTON)
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img.SetMarginStart(5)
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img.SetMarginEnd(5)
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img.SetMarginTop(5)
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img.SetMarginBottom(5)
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img.Show()
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// Cap the width and height if requested.
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var w, h = parser.FragmentImageSize(uri, MaxWidth, MaxHeight)
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httputil.AsyncImageSized(img, uri, w, h)
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p, _ := gtk.PopoverNew(c)
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p.SetPointingTo(r)
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p.Connect("closed", img.Destroy) // on close, destroy image
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p.Add(img)
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p.Popup()
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return true
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default:
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return false
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}
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})
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}
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// ext parses and sanitizes the extension to something comparable.
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func ext(uri string) string {
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u, err := url.Parse(uri)
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if err != nil {
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return strings.ToLower(path.Ext(uri))
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}
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return strings.ToLower(path.Ext(u.Path))
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}
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