mirror of
https://github.com/makeworld-the-better-one/amfora.git
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155 lines
4.2 KiB
Go
155 lines
4.2 KiB
Go
package display
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// This file contains the functions that aren't part of the public API.
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// The funcs are for network and displaying.
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import (
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"net/url"
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"strconv"
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"strings"
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"github.com/makeworld-the-better-one/amfora/renderer"
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"github.com/makeworld-the-better-one/amfora/structs"
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)
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// followLink should be used when the user "clicks" a link on a page,
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// but not when a URL is opened on a new tab for the first time.
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//
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// It will handle updating the bottomBar.
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//
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// It should be called with the `go` keyword to spawn a new goroutine if
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// it would otherwise block the UI loop, such as when called from an input
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// handler.
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//
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// It blocks until navigation is finished, and we've completed any user
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// interaction related to loading the URL (such as info, error modals)
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func followLink(t *tab, prev, next string) {
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if strings.HasPrefix(next, "about:") {
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goURL(t, next)
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return
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}
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if t.hasContent() && !t.isAnAboutPage() {
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nextURL, err := resolveRelLink(t, prev, next)
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if err != nil {
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Error("URL Error", err.Error())
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return
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}
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goURL(t, nextURL)
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return
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}
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// No content on current tab, so the "prev" URL is not valid.
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// An example is the about:newtab page
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_, err := url.Parse(next)
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if err != nil {
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Error("URL Error", "Link URL could not be parsed")
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return
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}
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goURL(t, next)
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}
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// reformatPage will take the raw page content and reformat it according to the current terminal dimensions.
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// It should be called when the terminal size changes.
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// It will not waste resources if the passed page is already fitted to the current terminal width, and can be
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// called safely even when the page might be already formatted properly.
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func reformatPage(p *structs.Page) {
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if p.TermWidth == termW {
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// No changes to make
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return
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}
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// TODO: Setup a renderer.RenderFromMediatype func so this isn't needed
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var rendered string
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switch p.Mediatype {
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case structs.TextGemini:
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// Links are not recorded because they won't change
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proxied := true
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if strings.HasPrefix(p.URL, "gemini") ||
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strings.HasPrefix(p.URL, "about") ||
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strings.HasPrefix(p.URL, "file") {
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proxied = false
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}
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rendered, _ = renderer.RenderGemini(p.Raw, textWidth(), proxied)
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case structs.TextPlain:
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rendered = renderer.RenderPlainText(p.Raw)
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case structs.TextAnsi:
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rendered = renderer.RenderANSI(p.Raw)
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default:
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// Rendering this type is not implemented
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return
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}
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p.Content = rendered
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p.TermWidth = termW
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}
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// reformatPageAndSetView is for reformatting a page that is already being displayed.
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// setPage should be used when a page is being loaded for the first time.
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func reformatPageAndSetView(t *tab, p *structs.Page) {
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if p.TermWidth == termW {
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// No changes to make
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return
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}
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reformatPage(p)
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t.view.SetText(p.Content)
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t.applyScroll() // Go back to where you were, roughly
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App.Draw()
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}
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// setPage displays a Page on the passed tab number.
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// The bottomBar is not actually changed in this func
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func setPage(t *tab, p *structs.Page) {
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if !isValidTab(t) {
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// Don't waste time reformatting an invalid tab
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return
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}
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// Make sure the page content is fitted to the terminal every time it's displayed
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reformatPage(p)
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t.page = p
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// Change page on screen
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t.view.SetText(p.Content)
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t.view.Highlight("") // Turn off highlights, other funcs may restore if necessary
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t.view.ScrollToBeginning()
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// Reset page left margin
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tabNum := tabNumber(t)
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browser.AddTab(
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strconv.Itoa(tabNum),
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t.label(),
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makeContentLayout(t.view, leftMargin()),
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)
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App.Draw()
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// Setup display
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App.SetFocus(t.view)
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// Save bottom bar for the tab - other funcs will apply/display it
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t.barLabel = ""
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t.barText = p.URL
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}
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// goURL is like handleURL, but takes care of history and the bottomBar.
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// It should be preferred over handleURL in most cases.
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// It has no return values to be processed.
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//
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// It should be called in a goroutine.
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func goURL(t *tab, u string) {
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// Update page cache in history for #122
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t.historyCachePage()
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final, displayed := handleURL(t, u, 0)
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if displayed {
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t.addToHistory(final)
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} else if t.page.URL == "" {
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// The tab is showing interstitial or no content. Let's go to about:newtab.
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handleAbout(t, "about:newtab")
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}
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if t == tabs[curTab] {
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// Display the bottomBar state that handleURL set
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t.applyBottomBar()
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}
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}
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