Implement semi-standard "\e]8" escape sequence for links.

doc/DomTerm.texi

@@ -2208,7 +2208,7 @@ For example @code{.html} matches html files.
 Suceeds if @var{condition} fails and vice versa.
 @end table
 @item @var{custom template}
-Useing @samp{%}-escapes to create a susyem shell command.
+Using @samp{%}-escapes to create a system shell command.
 The following escapes are supported:
 @table @asis
 @item @code{%U}
@@ -2575,6 +2575,27 @@ can be moved between windows.
 
 Implement ``drop-down'' mode.
 
+@subsubheading Implement our own menus
+
+We should implement our own context-menu and optionally a menubar
+using some portable JavaScript library.
+Currently, menus are implemented when embedded in Electron, Qt, or Atom,
+but not for other embeddings or when using a desktop browser.
+
+If we implement our menubar and context menu and they look reasonably nice,
+then there is little need to use Electron or Qt:
+Using Chrome with the @code{--app} flag should be just as nice,
+and presumably use less memory.
+@uref{https://github.com/zserge/webview/,Webview} is another (zippier) option.
+
+Most promising is PhosphorJS
+(has other useful features, but uses TypeScript, and is a bit heavy).
+Other options:
+@uref{https://github.com/s-yadav/contextMenu.js,contextMenu.js}
+(not actively maintained, doesn't have all we need,
+but has the basics and can be enhanced);
+@uref{https://jqueryui.com/menu/,JQuery UI Menu}.
+
 @subheading Support other embeddable browsers
 
 Some toolkits to explore for integrated browser/application:
@@ -3082,6 +3103,13 @@ Specifies the current directory of the process.
 (This is generated by some shells by default.
 On Fedora this is done by the script @code{/etc/profile.d/vte.sh}.)
 
+@item @code{"\e]8;"} @var{options} @code{";"} @var{url} @code{"\a"} @var{text} @code{"\e]8;;\a"}
+
+Create a link with the given @var{url} and
+display @var{text} (which can contain other escape sequences for styling).
+The @var{options} are ignored.  The link has @code{class="subtle"}.
+See @uref{https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda,this link}.
+
 @item @code{"\e]30;" @var{name} "\a"}
 Sets the ``session name'' to @var{name}, which is shown in the window title.
 Specifically sets the @code{name} attribute of the top-level

hlib/terminal.js

@@ -5397,6 +5397,26 @@ DomTerm.prototype.handleOperatingSystemControl = function(code, text) {
     case 31:
         this.topNode.setAttribute("pid", text);
         break;
+    case 8:
+        var semi = text.indexOf(';');
+        if (semi >= 0) {
+            let options = text.substring(0, semi);
+            let url = text.substring(semi+1);
+            let oldLink = DomTerm._isInElement(this.outputContainer, "A");
+            if (oldLink) {
+                while (this.outputContainer != oldLink)
+                    this._popStyleSpan();
+                this._popStyleSpan();
+            }
+            if (url) {
+                let newLink = document.createElement("A");
+                newLink.setAttribute("href", url);
+                newLink.setAttribute("class", "subtle");
+                this._pushIntoElement(newLink);
+                DomTerm._addMouseEnterHandlers(this, newLink.parentNode);
+            }
+        }
+        break;
     case 10:
     case 11:
     case 12:
@@ -8437,22 +8457,22 @@ DomTerm.isDelimiter = (function() {
     let mask2 = 0; // mask for char values 64..95
     let mask3 = 0; // mask for char values 96..127
     for (let i = delimiterChars.length; --i >= 0; ) {
-	let ch = delimiterChars.charCodeAt(i);
-	if (ch >= 32 && ch < 64)
-	    mask1 |= 1 << (ch - 32);
-	else if (ch >= 64 && ch < 96)
-	    mask2 |= 1 << (ch - 64);
-	else if (ch >= 96 && ch < 128)
-	    mask3 |= 1 << (ch - 96);
+        let ch = delimiterChars.charCodeAt(i);
+        if (ch >= 32 && ch < 64)
+            mask1 |= 1 << (ch - 32);
+        else if (ch >= 64 && ch < 96)
+            mask2 |= 1 << (ch - 64);
+        else if (ch >= 96 && ch < 128)
+            mask3 |= 1 << (ch - 96);
     }
     return function(ch) {
-	if (ch < 64)
-	    return ch <= 32 ? true : (mask1 & (1 << (ch - 32))) != 0;
-	else if (ch < 128)
-	    return ch < 96 ? (mask2 & (1 << (ch - 64))) != 0
-	    : (mask3 & (1 << (ch - 96))) != 0;
-	else
-	    return false;
+        if (ch < 64)
+            return ch <= 32 ? true : (mask1 & (1 << (ch - 32))) != 0;
+        else if (ch < 128)
+            return ch < 96 ? (mask2 & (1 << (ch - 64))) != 0
+            : (mask3 & (1 << (ch - 96))) != 0;
+        else
+            return false;
     }
 })();