--- /dev/null
+// This is NOT a core component of lariza, but an optional user script.
+// Please refer to lariza.usage(1) for more information on user scripts.
+
+// Press "f" (open link in current window) or "F" (open in new window)
+// to activate link hints. After typing the characters for one of them,
+// press Enter to confirm. Press Escape to abort.
+//
+// This is an "80% solution". It works for many web sites, but has
+// flaws. For more background on this topic, see this blog post:
+// https://www.uninformativ.de/blog/postings/2020-02-24/0/POSTING-en.html
+
+// Based on the following, but modified for lariza and personal taste:
+//
+// easy links for surf
+// christian hahn <ch radamanthys de>, sep 2010
+// http://surf.suckless.org/files/easy_links/
+//
+// link hints for surf
+// based on chromium plugin code, adapted by Nibble<.gs@gmail.com>
+// http://surf.suckless.org/files/link_hints/
+
+// Anonymous function to get private namespace.
+(function() {
+
+var charset = "sdfghjklertzuivbn".split("");
+var key_follow = "f";
+var key_follow_new_win = "F";
+
+function update_highlights_or_abort()
+{
+ var submatch;
+ var col_sel, col_unsel;
+ var longest_id = 0;
+
+ if (document.lariza_hints.state === "follow_new")
+ {
+ col_unsel = "#DAFFAD";
+ col_sel = "#FF5D00";
+ }
+ else
+ {
+ col_unsel = "#A7FFF5";
+ col_sel = "#33FF00";
+ }
+
+ for (var id in document.lariza_hints.labels)
+ {
+ var label = document.lariza_hints.labels[id];
+ var bgcol = col_unsel;
+
+ longest_id = Math.max(longest_id, id.length);
+
+ if (document.lariza_hints.box.value !== "")
+ {
+ submatch = id.match("^" + document.lariza_hints.box.value);
+ if (submatch !== null)
+ {
+ var href_suffix = "";
+ var box_shadow_inner = "#B00000";
+ if (id === document.lariza_hints.box.value)
+ {
+ bgcol = col_sel;
+ box_shadow_inner = "red";
+ if (label.elem.tagName.toLowerCase() === "a")
+ href_suffix = ": <span style='font-size: 75%'>" +
+ label.elem.href + "</span>";
+ }
+
+ var len = submatch[0].length;
+ label.span.innerHTML = "<b>" + submatch[0] + "</b>" +
+ id.substring(len, id.length) +
+ href_suffix;
+ label.span.style.visibility = "visible";
+
+ save_parent_style(label);
+ label.elem.style.boxShadow = "0 0 5pt 2pt black, 0 0 0 2pt " +
+ box_shadow_inner + " inset";
+ }
+ else
+ {
+ label.span.style.visibility = "hidden";
+ reset_parent_style(label);
+ }
+ }
+ else
+ {
+ label.span.style.visibility = "visible";
+ label.span.innerHTML = id;
+ reset_parent_style(label);
+ }
+ label.span.style.backgroundColor = bgcol;
+ }
+
+ if (document.lariza_hints.box.value.length > longest_id)
+ set_state("inactive");
+}
+
+function open_match()
+{
+ var choice = document.lariza_hints.box.value;
+ var was_state = document.lariza_hints.state;
+
+ var elem = document.lariza_hints.labels[choice].elem;
+ set_state("inactive"); /* Nukes labels. */
+
+ if (elem)
+ {
+ var tag_name = elem.tagName.toLowerCase();
+ var type = elem.type ? elem.type.toLowerCase() : "";
+
+ console.log("[hints] Selected elem [" + elem + "] [" + tag_name +
+ "] [" + type + "]");
+
+ if (was_state === "follow_new" && tag_name === "a")
+ window.open(elem.href);
+ else if (
+ (
+ tag_name === "input" &&
+ type !== "button" &&
+ type !== "color" &&
+ type !== "checkbox" &&
+ type !== "file" &&
+ type !== "radio" &&
+ type !== "reset" &&
+ type !== "submit"
+ ) ||
+ tag_name === "textarea" ||
+ tag_name === "select"
+ )
+ elem.focus();
+ else
+ elem.click();
+ }
+}
+
+function reset_parent_style(label)
+{
+ if (label.parent_style !== null)
+ label.elem.style.boxShadow = label.parent_style.boxShadow;
+}
+
+function save_parent_style(label)
+{
+ if (label.parent_style === null)
+ {
+ var style = window.getComputedStyle(label.elem);
+ label.parent_style = new Object();
+ label.parent_style.boxShadow = style.getPropertyValue("boxShadow");
+ }
+}
+
+function set_state(new_state)
+{
+ console.log("[hints] New state: " + new_state);
+
+ document.lariza_hints.state = new_state;
+
+ if (document.lariza_hints.state === "inactive")
+ {
+ nuke_labels();
+
+ // Removing our box causes unwanted scrolling. Just hide it.
+ document.lariza_hints.box.blur();
+ document.lariza_hints.box.value = "";
+ document.lariza_hints.box.style.visibility = "hidden";
+ }
+ else
+ {
+ if (document.lariza_hints.labels === null)
+ create_labels();
+
+ // What a terrible hack.
+ //
+ // Web sites often grab key events. That interferes with our
+ // script. But of course, they tend to ignore key events if an
+ // input element is currently focused. So ... yup, we install an
+ // invisible text box (opacity 0) and focus it while follow mode
+ // is active.
+ var box = document.lariza_hints.box;
+ if (box === null)
+ {
+ document.lariza_hints.box = document.createElement("input");
+ box = document.lariza_hints.box;
+
+ box.addEventListener("keydown", on_box_key);
+ box.addEventListener("input", on_box_input);
+ box.style.opacity = "0";
+ box.style.position = "fixed";
+ box.style.left = "0px";
+ box.style.top = "0px";
+ box.type = "text";
+
+ box.setAttribute("lariza_input_box", "yes");
+
+ document.body.appendChild(box);
+ }
+
+ box.style.visibility = "visible";
+ box.focus();
+
+ update_highlights_or_abort();
+ }
+}
+
+function create_labels()
+{
+ document.lariza_hints.labels = new Object();
+
+ var selector = "a[href]:not([href=''])";
+ if (document.lariza_hints.state !== "follow_new")
+ {
+ selector += ", input:not([type=hidden]):not([lariza_input_box=yes])";
+ selector += ", textarea, select, button";
+ }
+
+ var elements = document.body.querySelectorAll(selector);
+
+ for (var i = 0; i < elements.length; i++)
+ {
+ var elem = elements[i];
+
+ var label_id = "";
+ var n = i;
+ do
+ {
+ // Appending the next "digit" (instead of prepending it as
+ // you would do it in a base conversion) scatters the labels
+ // better.
+ label_id += charset[n % charset.length];
+ n = Math.floor(n / charset.length);
+ } while (n !== 0);
+
+ var span = document.createElement("span");
+ span.style.border = "black 1pt solid";
+ span.style.color = "black";
+ span.style.fontFamily = "monospace";
+ span.style.fontSize = "10pt";
+ span.style.fontWeight = "normal";
+ span.style.margin = "0px 2pt";
+ span.style.position = "absolute";
+ span.style.textTransform = "lowercase";
+ span.style.visibility = "hidden";
+ span.style.zIndex = "2147483647"; // Max for WebKit according to luakit
+
+ document.lariza_hints.labels[label_id] = {
+ "elem": elem,
+ "span": span,
+ "parent_style": null,
+ };
+
+ // Appending the spans as children to anchors gives better
+ // placement results, but we can *only* do this for <a> ...
+ var tag_name = elem.tagName.toLowerCase();
+ if (tag_name === "a")
+ {
+ span.style.borderTopLeftRadius = "10pt";
+ span.style.borderBottomLeftRadius = "10pt";
+ span.style.padding = "0px 2pt 0px 5pt";
+ elem.appendChild(span);
+ }
+ else
+ {
+ span.style.borderRadius = "10pt";
+ span.style.padding = "0px 5pt";
+ elem.parentNode.insertBefore(span, elem);
+ }
+
+ console.log("[hints] Label ID " + label_id + ", " + i +
+ " for elem [" + elem + "]");
+ }
+}
+
+function nuke_labels()
+{
+ for (var id in document.lariza_hints.labels)
+ {
+ var label = document.lariza_hints.labels[id];
+
+ reset_parent_style(label);
+
+ var tag_name = label.elem.tagName.toLowerCase();
+ if (tag_name === "a")
+ label.elem.removeChild(label.span);
+ else
+ label.elem.parentNode.removeChild(label.span);
+ }
+
+ document.lariza_hints.labels = null;
+}
+
+function on_box_input(e)
+{
+ update_highlights_or_abort();
+}
+
+function on_box_key(e)
+{
+ if (e.key === "Escape")
+ {
+ e.preventDefault();
+ e.stopPropagation();
+ set_state("inactive");
+ }
+ else if (e.key === "Enter")
+ {
+ e.preventDefault();
+ e.stopPropagation();
+ open_match();
+ }
+}
+
+function on_window_key(e)
+{
+ if (e.target.nodeName.toLowerCase() === "textarea" ||
+ e.target.nodeName.toLowerCase() === "input" ||
+ document.designMode === "on" ||
+ e.target.contentEditable === "true")
+ {
+ return;
+ }
+
+ if (document.lariza_hints.state === "inactive")
+ {
+ if (e.key === key_follow)
+ set_state("follow");
+ else if (e.key === key_follow_new_win)
+ set_state("follow_new");
+ }
+}
+
+if (document.lariza_hints === undefined)
+{
+ document.lariza_hints = new Object();
+ document.lariza_hints.box = null;
+ document.lariza_hints.labels = null;
+ document.lariza_hints.state = "inactive";
+
+ document.addEventListener("keyup", on_window_key);
+
+ console.log("[hints] Initialized.");
+}
+else
+ console.log("[hints] ALREADY INSTALLED");
+
+}());
projects / chorizo.git / commitdiff