Lexis v1.0

COPYING

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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
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+  When we speak of free software, we are referring to freedom, not
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

Makefile

@@ -0,0 +1,18 @@
+APP?=lexis
+ROOT_DIR:=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+
+.PHONY: run
+run:
+	GOPATH=${ROOT_DIR}/vendor go run ${APP}.go $(filter-out $@, $(MAKECMDGOALS))
+
+.PHONY: build
+build:
+	GOPATH=${ROOT_DIR}/vendor go build ${APP}.go
+
+.PHONY: serve
+serve: build
+	${APP} --serve
+
+%:
+	@true
+

README.md

@@ -0,0 +1,83 @@
+# LEΞΙΣ v1.0
+
+This application is a part of the [glossa.info](https://glossa.info/) project.
+
+This is a semi-automatic parser of Ancient Greek and Latin languages, based on [http://www.perseus.tufts.edu/](http://www.perseus.tufts.edu/).
+
+The application can be used to determine the root form of a word from its form, facilitating translation from ancient languages.
+
+# License
+
+[GNU General Public License v3.](https://www.gnu.org/licenses/gpl-3.0.html)
+
+# Usage
+
+## Reference
+
+The program parses word form and suggests possible properties to be chosen in a drop-down menu.
+
+![](/web/assets/img/screenshot_1.png)
+
+Click the word to open Perseus analysis page
+
+All fields are editable.
+
+![](web/assets/img/screenshot_2.png)
+
+Adjust the table by choosing font size and disabling borders.
+
+![](web/assets/img/screenshot_3.png)
+
+The table settings are saved when the document is printed.
+
+### Command line usage
+
+![](web/assets/img/screenshot_6.png)
+
+## Launch locally
+
+### Download
+
+Binary files are available for [Linux](dist/lexis.linux.bin) and [MacOS](dist/lexis.darwin.bin).
+
+### Building from sources
+
+    $ git clone https://notabug.org/envrm/lexis
+    $ cd lexis
+
+    #1
+    $ make build
+
+    #2
+    $ go build lexis.go
+  
+### Launch
+
+#### Command line arguments:
+
+    $ lexis -h
+    Usage:
+      CLI: lexis <text>
+      WEB: lexis --serve [--port]
+
+      -port int
+            Server port (default 9000)
+      -serve
+            Serve LEΞΙΣ
+
+#### Web-service launch
+
+    #1
+    $ make serve
+    Server is started at port 9000
+
+    #2
+    $ lexis --serve [--port]
+    Server is started at port 9000
+
+    $ xdg-open http://localhost:9000
+
+# Development
+
+Submit your suggestions, amendments and improvements at [https://notabug.org/envrm/lexis](https://notabug.org/envrm/lexis) or send them to the e-mail address specified at [glossa.info](https://glossa.info/).
+

lexis.go

@@ -0,0 +1,366 @@
+package main
+
+// Copyright (C) 2019, Maxim Lihachev, <envrm@yandex.ru>
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+import (
+	"os"
+	"fmt"
+	"flag"
+	"sync"
+	"regexp"
+	"strings"
+	"strconv"
+	"net/http"
+	"path/filepath"
+	"html/template"
+	"github.com/gorilla/mux"
+	"github.com/PuerkitoBio/goquery"
+)
+
+// --------------------------------------------------------------------------------
+
+// Default options.
+const (
+	defaultLanguage = "ru"
+
+	defaultPort     = 9000
+
+	webDirectory    = "web"
+	tpls            = webDirectory + "/tpl/*.html"
+	assets          = webDirectory + "/assets/"
+	defaultTemplate = "page"
+	maxTextLength   = 100
+
+	perseus         = "http://www.perseus.tufts.edu/hopper/morph"
+
+	regexpMarks      = `[\d*?()$.,!"'·;:]+`
+	regexpDelimiters = `\n+`
+)
+
+// --------------------------------------------------------------------------------
+
+type PageData struct {
+	Page    string
+	Lang    string
+	Data    []Word
+}
+
+type Word struct {
+	Word      string
+	Url       string
+	Mark      bool
+	Delimiter bool
+	Analysis  []Analysis
+}
+
+type Analysis struct {
+	Variant     string
+	Translation string
+	Forms       []Form
+}
+
+type Form struct {
+	Form    string
+	Grammar string
+}
+
+type Queue struct {
+	rest  int
+	mutex sync.Mutex
+}
+
+// --------------------------------------------------------------------------------
+
+// printPageData prints grammatic analysis with indentations.
+// Used as output formatter for CLI interface for Lexis.
+func printPageData(data PageData) {
+	for _, w := range data.Data {
+		fmt.Printf("\n\033[1;32m>>> %s\033[0m\n", w.Word)
+
+		for i, grammar := range w.Analysis {
+			fmt.Printf("\n  %d) \033[35m%s\033[0m / %s\n", i+1, grammar.Variant, grammar.Translation)
+
+			for _, form := range grammar.Forms {
+				fmt.Printf("   > \033[36m%s\033[0m / %s\n", form.Form, form.Grammar)
+			}
+		}
+	}
+}
+
+// --------------------------------------------------------------------------------
+
+// recognizeLanguage returns possibly language of word.
+// At this moment it can be Greek or Latin.
+func recognizeLanguage (word string) string {
+	// r := regexp.MustCompile(`^.*[α-ωΑ-Ω]+.*$`)
+	r := regexp.MustCompile(`^.*[a-zA-Z]+.*$`)
+
+	if r.MatchString(word) {
+		return "lat"
+	} else {
+		return "greek"
+	}
+}
+
+// perseusUrl makes full URI for Perseus morph's page.
+func perseusUrl (word string) string {
+	return perseus + "?l=" + word + "&la="+ recognizeLanguage(word)
+}
+
+// excludeElementText seeks for element on the page and returns its inner text.
+func excludeElementText (selection *goquery.Selection, path string) string {
+	return strings.TrimSpace(selection.Find(path).Text())
+}
+
+// splitElements splits found HTML elements into list.
+func splitElements (selection *goquery.Selection) []string {
+	list := make([]string, selection.Size())
+
+	selection.Each(func(i int, element *goquery.Selection) {
+		list[i] = strings.TrimSpace(element.Text())
+	})
+
+	return list
+}
+
+// parseWords gets possible definitions, translations and grammar analysis from Perseus.
+func parseWord (word string, collector chan Word, queue *Queue) {
+	w := Word{ Word: word, Url: perseusUrl(word), Analysis: []Analysis{}}
+
+	r := regexp.MustCompile(regexpMarks)
+	n := regexp.MustCompile(regexpDelimiters)
+
+	if r.MatchString(word) {
+		w.Mark = true
+	} else if n.MatchString(word) {
+		w.Delimiter = true
+	}
+
+	if !w.Delimiter && !w.Mark {
+		document, _ := goquery.NewDocument(perseusUrl(word))
+
+		document.Find("div.analysis").Each(func(i int, analysis *goquery.Selection) {
+			variant     := excludeElementText(analysis, "h4")
+			translation := excludeElementText(analysis, ".lemma_definition")
+
+			f := []Form{}
+
+			analysis.Find("table tr").Each(func(i int, tr *goquery.Selection) {
+				tds := splitElements(tr.Find("td"))
+				form, grammar := tds[0], tds[1]
+
+				f = append(f, Form{form, grammar})
+			})
+
+			w.Analysis = append(w.Analysis, Analysis{variant, translation, f})
+		})
+	}
+
+	queue.mutex.Lock()
+	queue.rest -= 1
+
+	collector <- w
+
+	if queue.rest <= 0 {
+		close(collector)
+	}
+	queue.mutex.Unlock()
+}
+
+// parseTokens gets analysis for each word in a list concurrently.
+func parseTokens (text string) map[string]Word {
+	words := make(map[string]Word)
+
+	tokens := tokenize(text)
+
+	queue := Queue{rest: len(tokens)}
+
+	collector := make(chan Word, queue.rest)
+
+	for _, w := range tokens {
+		go parseWord(w, collector, &queue)
+	}
+
+	for w := range collector {
+		words[w.Word] = w
+	}
+
+	return words
+}
+
+// parseText starts parsing of each word in the text and returns PageData structure.
+func parseText (text string) PageData {
+	textForParsing := splitText(text)
+
+	data := PageData{ Page: "parse" }
+
+	if len(textForParsing) > maxTextLength {
+		textForParsing = textForParsing[:maxTextLength]
+	}
+
+	forms := parseTokens(strings.Join(textForParsing, " "))
+
+	for _, w := range textForParsing {
+		form := forms[strings.ToLower(w)]
+
+		form.Word = w
+
+		data.Data = append(data.Data, form)
+	}
+
+	return data
+}
+
+// splitText returns list of words and punctuation marks.
+func splitText (logion string) []string {
+	re := regexp.MustCompile(`[\p{L}]+|` + regexpMarks + `|` + regexpDelimiters)
+	return re.FindAllString(logion, -1)
+}
+
+// tokenize returns list of unique words and punctuations in lower case.
+func tokenize (logion string) []string {
+	tokens := make(map[string]bool)
+
+	for _, e := range splitText(logion) {
+		q := strings.ToLower(e)
+
+		if _, exists := tokens[q]; !exists && q != "" {
+			tokens[q] = true
+		}
+	}
+
+	var result []string
+	for item, _ := range tokens {
+		result = append(result, item)
+	}
+	return result
+}
+
+// --------------------------------------------------------------------------------
+
+// renderPage fills in Go HTML template.
+func renderPage(w http.ResponseWriter, data PageData) {
+	t, _ := template.ParseGlob(tpls)
+	t.ExecuteTemplate(w, defaultTemplate, data)
+}
+
+// srvDefault redirects to index page in default language
+func srvDefault(w http.ResponseWriter, r *http.Request) {
+	renderPage(w, PageData{ Page: "index", Lang: defaultLanguage })
+}
+
+// notFound handler redirects user to index page
+func notFound(w http.ResponseWriter, r *http.Request) {
+	http.Redirect(w, r, "/", http.StatusSeeOther)
+}
+
+// srvParse shows parse.html page.
+func srvParse(w http.ResponseWriter, r *http.Request) {
+	r.ParseForm()
+	fmt.Println("PARSE:")
+	fmt.Println(r.Form)
+	fmt.Println(r.Form["url_long"])
+
+	vars := mux.Vars(r)
+
+	if text, ok := r.Form["text"]; ok {
+		t := strings.TrimSpace(strings.Join(text, ""))
+
+		if strings.TrimSpace(t) != "" {
+			data := parseText(t)
+
+			data.Lang = vars["lang"]
+
+			renderPage(w, data)
+		} else {
+			http.Redirect(w, r, "/" + vars["lang"] + "/", http.StatusSeeOther)
+		}
+	}
+}
+
+// srvPage 
+func srvPage(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	switch vars["page"] {
+		case "parse":
+			srvParse(w, r)
+		case "about":
+			renderPage(w, PageData{ Page: "about", Lang: vars["lang"] })
+		case "":
+			renderPage(w, PageData{ Page: "index", Lang: vars["lang"] })
+		default:
+			srvDefault(w, r)
+	}
+}
+
+// srv runs server on specified port.
+func srv(port int) {
+	fmt.Println("Server is started at port", port)
+
+	router := mux.NewRouter()
+
+	http.Handle("/assets/", http.StripPrefix("/assets/", http.FileServer(http.Dir(assets))))
+
+	router.HandleFunc("/", srvDefault)
+	router.HandleFunc("/{lang}/", srvPage)
+	router.HandleFunc("/{lang}/{page}/", srvPage)
+
+	router.NotFoundHandler = http.HandlerFunc(notFound)
+
+	http.Handle("/", router)
+
+	err := http.ListenAndServe(":" + strconv.Itoa(port), nil)
+
+	if err != nil {
+		fmt.Println("ListenAndServe: ", err)
+	}
+}
+
+// --------------------------------------------------------------------------------
+
+func showHelp() {
+	program := filepath.Base(os.Args[0])
+
+	fmt.Printf("Usage:\n")
+	fmt.Printf("  CLI: %s <text>\n", program)
+	fmt.Printf("  WEB: %s --serve [--port]\n\n", program)
+
+	flag.PrintDefaults()
+}
+
+func main() {
+	flag.Usage = showHelp
+
+	port  := flag.Int("port", defaultPort, "Server port")
+	serve := flag.Bool("serve", false, "Serve LEΞΙΣ")
+
+	flag.Parse()
+
+	if (*serve) {
+		srv(*port)
+	} else if (len(flag.Args()) > 0) {
+		txt := strings.Join(flag.Args(), " ")
+
+		fmt.Printf("<< %s >>\n", txt)
+		printPageData(parseText(txt))
+		fmt.Println("")
+	} else {
+		flag.Usage()
+	}
+}
+

vendor/src/github.com/PuerkitoBio/goquery/.travis.yml

@@ -0,0 +1,16 @@
+language: go
+
+go:
+    - 1.1
+    - 1.2.x
+    - 1.3.x
+    - 1.4.x
+    - 1.5.x
+    - 1.6.x
+    - 1.7.x
+    - 1.8.x
+    - 1.9.x
+    - "1.10.x"
+    - 1.11.x
+    - tip
+

vendor/src/github.com/PuerkitoBio/goquery/LICENSE

@@ -0,0 +1,12 @@
+Copyright (c) 2012-2016, Martin Angers & Contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+* Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/src/github.com/PuerkitoBio/goquery/README.md

@@ -0,0 +1,181 @@
+# goquery - a little like that j-thing, only in Go
+[![build status](https://secure.travis-ci.org/PuerkitoBio/goquery.svg?branch=master)](http://travis-ci.org/PuerkitoBio/goquery) [![GoDoc](https://godoc.org/github.com/PuerkitoBio/goquery?status.png)](http://godoc.org/github.com/PuerkitoBio/goquery) [![Sourcegraph Badge](https://sourcegraph.com/github.com/PuerkitoBio/goquery/-/badge.svg)](https://sourcegraph.com/github.com/PuerkitoBio/goquery?badge)
+
+goquery brings a syntax and a set of features similar to [jQuery][] to the [Go language][go]. It is based on Go's [net/html package][html] and the CSS Selector library [cascadia][]. Since the net/html parser returns nodes, and not a full-featured DOM tree, jQuery's stateful manipulation functions (like height(), css(), detach()) have been left off.
+
+Also, because the net/html parser requires UTF-8 encoding, so does goquery: it is the caller's responsibility to ensure that the source document provides UTF-8 encoded HTML. See the [wiki][] for various options to do this.
+
+Syntax-wise, it is as close as possible to jQuery, with the same function names when possible, and that warm and fuzzy chainable interface. jQuery being the ultra-popular library that it is, I felt that writing a similar HTML-manipulating library was better to follow its API than to start anew (in the same spirit as Go's `fmt` package), even though some of its methods are less than intuitive (looking at you, [index()][index]...).
+
+## Table of Contents
+
+* [Installation](#installation)
+* [Changelog](#changelog)
+* [API](#api)
+* [Examples](#examples)
+* [Related Projects](#related-projects)
+* [Support](#support)
+* [License](#license)
+
+## Installation
+
+Please note that because of the net/html dependency, goquery requires Go1.1+.
+
+    $ go get github.com/PuerkitoBio/goquery
+
+(optional) To run unit tests:
+
+    $ cd $GOPATH/src/github.com/PuerkitoBio/goquery
+    $ go test
+
+(optional) To run benchmarks (warning: it runs for a few minutes):
+
+    $ cd $GOPATH/src/github.com/PuerkitoBio/goquery
+    $ go test -bench=".*"
+
+## Changelog
+
+**Note that goquery's API is now stable, and will not break.**
+
+*    **2018-11-15 (v1.5.0)** : Go module support (thanks @Zaba505).
+*    **2018-06-07 (v1.4.1)** : Add `NewDocumentFromReader` examples.
+*    **2018-03-24 (v1.4.0)** : Deprecate `NewDocument(url)` and `NewDocumentFromResponse(response)`.
+*    **2018-01-28 (v1.3.0)** : Add `ToEnd` constant to `Slice` until the end of the selection (thanks to @davidjwilkins for raising the issue).
+*    **2018-01-11 (v1.2.0)** : Add `AddBack*` and deprecate `AndSelf` (thanks to @davidjwilkins).
+*    **2017-02-12 (v1.1.0)** : Add `SetHtml` and `SetText` (thanks to @glebtv).
+*    **2016-12-29 (v1.0.2)** : Optimize allocations for `Selection.Text` (thanks to @radovskyb).
+*    **2016-08-28 (v1.0.1)** : Optimize performance for large documents.
+*    **2016-07-27 (v1.0.0)** : Tag version 1.0.0.
+*    **2016-06-15** : Invalid selector strings internally compile to a `Matcher` implementation that never matches any node (instead of a panic). So for example, `doc.Find("~")` returns an empty `*Selection` object.
+*    **2016-02-02** : Add `NodeName` utility function similar to the DOM's `nodeName` property. It returns the tag name of the first element in a selection, and other relevant values of non-element nodes (see godoc for details). Add `OuterHtml` utility function similar to the DOM's `outerHTML` property (named `OuterHtml` in small caps for consistency with the existing `Html` method on the `Selection`).
+*    **2015-04-20** : Add `AttrOr` helper method to return the attribute's value or a default value if absent. Thanks to [piotrkowalczuk][piotr].
+*    **2015-02-04** : Add more manipulation functions - Prepend* - thanks again to [Andrew Stone][thatguystone].
+*    **2014-11-28** : Add more manipulation functions - ReplaceWith*, Wrap* and Unwrap - thanks again to [Andrew Stone][thatguystone].
+*    **2014-11-07** : Add manipulation functions (thanks to [Andrew Stone][thatguystone]) and `*Matcher` functions, that receive compiled cascadia selectors instead of selector strings, thus avoiding potential panics thrown by goquery via `cascadia.MustCompile` calls. This results in better performance (selectors can be compiled once and reused) and more idiomatic error handling (you can handle cascadia's compilation errors, instead of recovering from panics, which had been bugging me for a long time). Note that the actual type expected is a `Matcher` interface, that `cascadia.Selector` implements. Other matcher implementations could be used.
+*    **2014-11-06** : Change import paths of net/html to golang.org/x/net/html (see https://groups.google.com/forum/#!topic/golang-nuts/eD8dh3T9yyA). Make sure to update your code to use the new import path too when you call goquery with `html.Node`s.
+*    **v0.3.2** : Add `NewDocumentFromReader()` (thanks jweir) which allows creating a goquery document from an io.Reader.
+*    **v0.3.1** : Add `NewDocumentFromResponse()` (thanks assassingj) which allows creating a goquery document from an http response.
+*    **v0.3.0** : Add `EachWithBreak()` which allows to break out of an `Each()` loop by returning false. This function was added instead of changing the existing `Each()` to avoid breaking compatibility.
+*    **v0.2.1** : Make go-getable, now that [go.net/html is Go1.0-compatible][gonet] (thanks to @matrixik for pointing this out).
+*    **v0.2.0** : Add support for negative indices in Slice(). **BREAKING CHANGE** `Document.Root` is removed, `Document` is now a `Selection` itself (a selection of one, the root element, just like `Document.Root` was before). Add jQuery's Closest() method.
+*    **v0.1.1** : Add benchmarks to use as baseline for refactorings, refactor Next...() and Prev...() methods to use the new html package's linked list features (Next/PrevSibling, FirstChild). Good performance boost (40+% in some cases).
+*    **v0.1.0** : Initial release.
+
+## API
+
+goquery exposes two structs, `Document` and `Selection`, and the `Matcher` interface. Unlike jQuery, which is loaded as part of a DOM document, and thus acts on its containing document, goquery doesn't know which HTML document to act upon. So it needs to be told, and that's what the `Document` type is for. It holds the root document node as the initial Selection value to manipulate.
+
+jQuery often has many variants for the same function (no argument, a selector string argument, a jQuery object argument, a DOM element argument, ...). Instead of exposing the same features in goquery as a single method with variadic empty interface arguments, statically-typed signatures are used following this naming convention:
+
+*    When the jQuery equivalent can be called with no argument, it has the same name as jQuery for the no argument signature (e.g.: `Prev()`), and the version with a selector string argument is called `XxxFiltered()` (e.g.: `PrevFiltered()`)
+*    When the jQuery equivalent **requires** one argument, the same name as jQuery is used for the selector string version (e.g.: `Is()`)
+*    The signatures accepting a jQuery object as argument are defined in goquery as `XxxSelection()` and take a `*Selection` object as argument (e.g.: `FilterSelection()`)
+*    The signatures accepting a DOM element as argument in jQuery are defined in goquery as `XxxNodes()` and take a variadic argument of type `*html.Node` (e.g.: `FilterNodes()`)
+*    The signatures accepting a function as argument in jQuery are defined in goquery as `XxxFunction()` and take a function as argument (e.g.: `FilterFunction()`)
+*    The goquery methods that can be called with a selector string have a corresponding version that take a `Matcher` interface and are defined as `XxxMatcher()` (e.g.: `IsMatcher()`)
+
+Utility functions that are not in jQuery but are useful in Go are implemented as functions (that take a `*Selection` as parameter), to avoid a potential naming clash on the `*Selection`'s methods (reserved for jQuery-equivalent behaviour).
+
+The complete [godoc reference documentation can be found here][doc].
+
+Please note that Cascadia's selectors do not necessarily match all supported selectors of jQuery (Sizzle). See the [cascadia project][cascadia] for details. Invalid selector strings compile to a `Matcher` that fails to match any node. Behaviour of the various functions that take a selector string as argument follows from that fact, e.g. (where `~` is an invalid selector string):
+
+* `Find("~")` returns an empty selection because the selector string doesn't match anything.
+* `Add("~")` returns a new selection that holds the same nodes as the original selection, because it didn't add any node (selector string didn't match anything).
+* `ParentsFiltered("~")` returns an empty selection because the selector string doesn't match anything.
+* `ParentsUntil("~")` returns all parents of the selection because the selector string didn't match any element to stop before the top element.
+
+## Examples
+
+See some tips and tricks in the [wiki][].
+
+Adapted from example_test.go:
+
+```Go
+package main
+
+import (
+  "fmt"
+  "log"
+  "net/http"
+
+  "github.com/PuerkitoBio/goquery"
+)
+
+func ExampleScrape() {
+  // Request the HTML page.
+  res, err := http.Get("http://metalsucks.net")
+  if err != nil {
+    log.Fatal(err)
+  }
+  defer res.Body.Close()
+  if res.StatusCode != 200 {
+    log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
+  }
+
+  // Load the HTML document
+  doc, err := goquery.NewDocumentFromReader(res.Body)
+  if err != nil {
+    log.Fatal(err)
+  }
+
+  // Find the review items
+  doc.Find(".sidebar-reviews article .content-block").Each(func(i int, s *goquery.Selection) {
+    // For each item found, get the band and title
+    band := s.Find("a").Text()
+    title := s.Find("i").Text()
+    fmt.Printf("Review %d: %s - %s\n", i, band, title)
+  })
+}
+
+func main() {
+  ExampleScrape()
+}
+```
+
+## Related Projects
+
+- [Goq][goq], an HTML deserialization and scraping library based on goquery and struct tags.
+- [andybalholm/cascadia][cascadia], the CSS selector library used by goquery.
+- [suntong/cascadia][cascadiacli], a command-line interface to the cascadia CSS selector library, useful to test selectors.
+- [asciimoo/colly](https://github.com/asciimoo/colly), a lightning fast and elegant Scraping Framework
+- [gnulnx/goperf](https://github.com/gnulnx/goperf), a website performance test tool that also fetches static assets.
+- [MontFerret/ferret](https://github.com/MontFerret/ferret), declarative web scraping.
+- [tacusci/berrycms](https://github.com/tacusci/berrycms), a modern simple to use CMS with easy to write plugins
+- [Dataflow kit](https://github.com/slotix/dataflowkit), Web Scraping framework for Gophers.  
+
+## Support
+
+There are a number of ways you can support the project:
+
+* Use it, star it, build something with it, spread the word!
+  - If you do build something open-source or otherwise publicly-visible, let me know so I can add it to the [Related Projects](#related-projects) section!
+* Raise issues to improve the project (note: doc typos and clarifications are issues too!)
+  - Please search existing issues before opening a new one - it may have already been adressed.
+* Pull requests: please discuss new code in an issue first, unless the fix is really trivial.
+  - Make sure new code is tested.
+  - Be mindful of existing code - PRs that break existing code have a high probability of being declined, unless it fixes a serious issue.
+
+If you desperately want to send money my way, I have a BuyMeACoffee.com page:
+
+<a href="https://www.buymeacoffee.com/mna" target="_blank"><img src="https://www.buymeacoffee.com/assets/img/custom_images/orange_img.png" alt="Buy Me A Coffee" style="height: 41px !important;width: 174px !important;box-shadow: 0px 3px 2px 0px rgba(190, 190, 190, 0.5) !important;-webkit-box-shadow: 0px 3px 2px 0px rgba(190, 190, 190, 0.5) !important;" ></a>
+
+## License
+
+The [BSD 3-Clause license][bsd], the same as the [Go language][golic]. Cascadia's license is [here][caslic].
+
+[jquery]: http://jquery.com/
+[go]: http://golang.org/
+[cascadia]: https://github.com/andybalholm/cascadia
+[cascadiacli]: https://github.com/suntong/cascadia
+[bsd]: http://opensource.org/licenses/BSD-3-Clause
+[golic]: http://golang.org/LICENSE
+[caslic]: https://github.com/andybalholm/cascadia/blob/master/LICENSE
+[doc]: http://godoc.org/github.com/PuerkitoBio/goquery
+[index]: http://api.jquery.com/index/
+[gonet]: https://github.com/golang/net/
+[html]: http://godoc.org/golang.org/x/net/html
+[wiki]: https://github.com/PuerkitoBio/goquery/wiki/Tips-and-tricks
+[thatguystone]: https://github.com/thatguystone
+[piotr]: https://github.com/piotrkowalczuk
+[goq]: https://github.com/andrewstuart/goq

vendor/src/github.com/PuerkitoBio/goquery/array.go

@@ -0,0 +1,124 @@
+package goquery
+
+import (
+	"golang.org/x/net/html"
+)
+
+const (
+	maxUint = ^uint(0)
+	maxInt  = int(maxUint >> 1)
+
+	// ToEnd is a special index value that can be used as end index in a call
+	// to Slice so that all elements are selected until the end of the Selection.
+	// It is equivalent to passing (*Selection).Length().
+	ToEnd = maxInt
+)
+
+// First reduces the set of matched elements to the first in the set.
+// It returns a new Selection object, and an empty Selection object if the
+// the selection is empty.
+func (s *Selection) First() *Selection {
+	return s.Eq(0)
+}
+
+// Last reduces the set of matched elements to the last in the set.
+// It returns a new Selection object, and an empty Selection object if
+// the selection is empty.
+func (s *Selection) Last() *Selection {
+	return s.Eq(-1)
+}
+
+// Eq reduces the set of matched elements to the one at the specified index.
+// If a negative index is given, it counts backwards starting at the end of the
+// set. It returns a new Selection object, and an empty Selection object if the
+// index is invalid.
+func (s *Selection) Eq(index int) *Selection {
+	if index < 0 {
+		index += len(s.Nodes)
+	}
+
+	if index >= len(s.Nodes) || index < 0 {
+		return newEmptySelection(s.document)
+	}
+
+	return s.Slice(index, index+1)
+}
+
+// Slice reduces the set of matched elements to a subset specified by a range
+// of indices. The start index is 0-based and indicates the index of the first
+// element to select. The end index is 0-based and indicates the index at which
+// the elements stop being selected (the end index is not selected).
+//
+// The indices may be negative, in which case they represent an offset from the
+// end of the selection.
+//
+// The special value ToEnd may be specified as end index, in which case all elements
+// until the end are selected. This works both for a positive and negative start
+// index.
+func (s *Selection) Slice(start, end int) *Selection {
+	if start < 0 {
+		start += len(s.Nodes)
+	}
+	if end == ToEnd {
+		end = len(s.Nodes)
+	} else if end < 0 {
+		end += len(s.Nodes)
+	}
+	return pushStack(s, s.Nodes[start:end])
+}
+
+// Get retrieves the underlying node at the specified index.
+// Get without parameter is not implemented, since the node array is available
+// on the Selection object.
+func (s *Selection) Get(index int) *html.Node {
+	if index < 0 {
+		index += len(s.Nodes) // Negative index gets from the end
+	}
+	return s.Nodes[index]
+}
+
+// Index returns the position of the first element within the Selection object
+// relative to its sibling elements.
+func (s *Selection) Index() int {
+	if len(s.Nodes) > 0 {
+		return newSingleSelection(s.Nodes[0], s.document).PrevAll().Length()
+	}
+	return -1
+}
+
+// IndexSelector returns the position of the first element within the
+// Selection object relative to the elements matched by the selector, or -1 if
+// not found.
+func (s *Selection) IndexSelector(selector string) int {
+	if len(s.Nodes) > 0 {
+		sel := s.document.Find(selector)
+		return indexInSlice(sel.Nodes, s.Nodes[0])
+	}
+	return -1
+}
+
+// IndexMatcher returns the position of the first element within the
+// Selection object relative to the elements matched by the matcher, or -1 if
+// not found.
+func (s *Selection) IndexMatcher(m Matcher) int {
+	if len(s.Nodes) > 0 {
+		sel := s.document.FindMatcher(m)
+		return indexInSlice(sel.Nodes, s.Nodes[0])
+	}
+	return -1
+}
+
+// IndexOfNode returns the position of the specified node within the Selection
+// object, or -1 if not found.
+func (s *Selection) IndexOfNode(node *html.Node) int {
+	return indexInSlice(s.Nodes, node)
+}
+
+// IndexOfSelection returns the position of the first node in the specified
+// Selection object within this Selection object, or -1 if not found.
+func (s *Selection) IndexOfSelection(sel *Selection) int {
+	if sel != nil && len(sel.Nodes) > 0 {
+		return indexInSlice(s.Nodes, sel.Nodes[0])
+	}
+	return -1
+}

vendor/src/github.com/PuerkitoBio/goquery/array_test.go

@@ -0,0 +1,234 @@
+package goquery
+
+import (
+	"testing"
+)
+
+func TestFirst(t *testing.T) {
+	sel := Doc().Find(".pvk-content").First()
+	assertLength(t, sel.Nodes, 1)
+}
+
+func TestFirstEmpty(t *testing.T) {
+	sel := Doc().Find(".pvk-zzcontentzz").First()
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestFirstInvalid(t *testing.T) {
+	sel := Doc().Find("").First()
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestFirstRollback(t *testing.T) {
+	sel := Doc().Find(".pvk-content")
+	sel2 := sel.First().End()
+	assertEqual(t, sel, sel2)
+}
+
+func TestLast(t *testing.T) {
+	sel := Doc().Find(".pvk-content").Last()
+	assertLength(t, sel.Nodes, 1)
+
+	// Should contain Footer
+	foot := Doc().Find(".footer")
+	if !sel.Contains(foot.Nodes[0]) {
+		t.Error("Last .pvk-content should contain .footer.")
+	}
+}
+
+func TestLastEmpty(t *testing.T) {
+	sel := Doc().Find(".pvk-zzcontentzz").Last()
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestLastInvalid(t *testing.T) {
+	sel := Doc().Find("").Last()
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestLastRollback(t *testing.T) {
+	sel := Doc().Find(".pvk-content")
+	sel2 := sel.Last().End()
+	assertEqual(t, sel, sel2)
+}
+
+func TestEq(t *testing.T) {
+	sel := Doc().Find(".pvk-content").Eq(1)
+	assertLength(t, sel.Nodes, 1)
+}
+
+func TestEqNegative(t *testing.T) {
+	sel := Doc().Find(".pvk-content").Eq(-1)
+	assertLength(t, sel.Nodes, 1)
+
+	// Should contain Footer
+	foot := Doc().Find(".footer")
+	if !sel.Contains(foot.Nodes[0]) {
+		t.Error("Index -1 of .pvk-content should contain .footer.")
+	}
+}
+
+func TestEqEmpty(t *testing.T) {
+	sel := Doc().Find("something_random_that_does_not_exists").Eq(0)
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestEqInvalid(t *testing.T) {
+	sel := Doc().Find("").Eq(0)
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestEqInvalidPositive(t *testing.T) {
+	sel := Doc().Find(".pvk-content").Eq(3)
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestEqInvalidNegative(t *testing.T) {
+	sel := Doc().Find(".pvk-content").Eq(-4)
+	assertLength(t, sel.Nodes, 0)
+}
+
+func TestEqRollback(t *testing.T) {
+	sel := Doc().Find(".pvk-content")
+	sel2 := sel.Eq(1).End()
+	assertEqual(t, sel, sel2)
+}
+
+func TestSlice(t *testing.T) {
+	sel := Doc().Find(".pvk-content").Slice(0, 2)
+
+	assertLength(t, sel.Nodes, 2)
+	assertSelectionIs(t, sel, "#pc1", "#pc2")
+}
+
+func TestSliceToEnd(t *testing.T) {
+	sel := Doc().Find(".pvk-content").Slice(1, ToEnd)
+
+	assertLength(t, sel.Nodes, 2)
+	assertSelectionIs(t, sel.Eq(0), "#pc2")
+	if _, ok := sel.Eq(1).Attr("id"); ok {
+		t.Error("Want no attribute ID, got one")
+	}
+}
+
+func TestSliceEmpty(t *testing.T) {
+	defer assertPanic(t)
+	Doc().Find("x").Slice(0, 2)
+}
+
+func TestSliceInvalid(t *testing.T) {
+	defer assertPanic(t)
+	Doc().Find("").Slice(0, 2)
+}
+
+func TestSliceInvalidToEnd(t *testing.T) {
+	defer assertPanic(t)
+	Doc().Find("").Slice(2, ToEnd)
+}
+
+func TestSliceOutOfBounds(t *testing.T) {
+	defer assertPanic(t)
+	Doc().Find(".pvk-content").Slice(2, 12)
+}
+
+func TestNegativeSliceStart(t *testing.T) {
+	sel := Doc().Find(".container-fluid").Slice(-2, 3)
+	assertLength(t, sel.Nodes, 1)
+	assertSelectionIs(t, sel.Eq(0), "#cf3")
+}
+
+func TestNegativeSliceEnd(t *testing.T) {
+	sel := Doc().Find(".container-fluid").Slice(1, -1)
+	assertLength(t, sel.Nodes, 2)
+	assertSelectionIs(t, sel.Eq(0), "#cf2")
+	assertSelectionIs(t, sel.Eq(1), "#cf3")
+}
+
+func TestNegativeSliceBoth(t *testing.T) {
+	sel := Doc().Find(".container-fluid").Slice(-3, -1)
+	assertLength(t, sel.Nodes, 2)
+	assertSelectionIs(t, sel.Eq(0), "#cf2")
+	assertSelectionIs(t, sel.Eq(1), "#cf3")
+}
+
+func TestNegativeSliceToEnd(t *testing.T) {
+	sel := Doc().Find(".container-fluid").Slice(-3, ToEnd)
+	assertLength(t, sel.Nodes, 3)
+	assertSelectionIs(t, sel, "#cf2", "#cf3", "#cf4")
+}
+
+func TestNegativeSliceOutOfBounds(t *testing.T) {
+	defer assertPanic(t)
+	Doc().Find(".container-fluid").Slice(-12, -7)
+}
+
+func TestSliceRollback(t *testing.T) {
+	sel := Doc().Find(".pvk-content")
+	sel2 := sel.Slice(0, 2).End()
+	assertEqual(t, sel, sel2)
+}
+
+func TestGet(t *testing.T) {
+	sel := Doc().Find(".pvk-content")
+	node := sel.Get(1)
+	if sel.Nodes[1] != node {
+		t.Errorf("Expected node %v to be %v.", node, sel.Nodes[1])
+	}
+}
+
+func TestGetNegative(t *testing.T) {
+	sel := Doc().Find(".pvk-content")
+	node := sel.Get(-3)
+	if sel.Nodes[0] != node {
+		t.Errorf("Expected node %v to be %v.", node, sel.Nodes[0])
+	}
+}
+
+func TestGetInvalid(t *testing.T) {
+	defer assertPanic(t)
+	sel := Doc().Find(".pvk-content")
+	sel.Get(129)