Implements and refactors clipboard feature for markdown.

app/assets/javascripts/markdown_area.js.coffee

-formatLink = (str) ->
-  "![" + str.alt + "](" + str.url + ")"
-
 $(document).ready ->
   alertClass = "alert alert-danger alert-dismissable div-dropzone-alert"
   alertAttr = "class=\"close\" data-dismiss=\"alert\"" + "aria-hidden=\"true\""
@@ -13,15 +10,12 @@ $(document).ready ->
   project_image_path_upload = window.project_image_path_upload or null
 
   $("textarea.markdown-area").wrap "<div class=\"div-dropzone\"></div>"  
-  
   $(".div-dropzone").parent().addClass "div-dropzone-wrapper"
-
   $(".div-dropzone").append divHover
   $(".div-dropzone-hover").append iconPicture
   $(".div-dropzone").append divSpinner 
   $(".div-dropzone-spinner").append iconSpinner
 
-
   dropzone = $(".div-dropzone").dropzone(
     url: project_image_path_upload
     dictDefaultMessage: ""
@@ -36,7 +30,7 @@ $(document).ready ->
     previewContainer: false
 
     processing: ->
-      $(".div-dropzone-alert").alert "close"
+      closeAlertMessage()
 
     dragover: ->
       $(".div-dropzone > textarea").addClass "div-dropzone-focus"
@@ -55,31 +49,127 @@ $(document).ready ->
       return
 
     success: (header, response) ->
-      child = $(dropzone[0]).children("textarea")
-      $(child).val $(child).val() + formatLink(response.link) + "\n"
+      appendToTextArea(formatLink(response.link))
       return
 
     error: (temp, errorMessage) ->
-      checkIfMsgExists = $(".error-alert").children().length
-      if checkIfMsgExists is 0
-        $(".error-alert").append divAlert
-        $(".div-dropzone-alert").append btnAlert + errorMessage
+      showError(errorMessage)
       return
 
     sending: ->
-      $(".div-dropzone-spinner").css "opacity", 0.7
+      showSpinner()
       return
 
     complete: ->
       $(".dz-preview").remove()
       $(".markdown-area").trigger "input"
-      $(".div-dropzone-spinner").css "opacity", 0
+      closeSpinner()
       return
   )
 
+  child = $(dropzone[0]).children("textarea")
+
+  formatLink = (str) ->
+    "![" + str.alt + "](" + str.url + ")"
+
+  handlePaste = (e) ->
+    e.preventDefault()
+    my_event = e.originalEvent
+    
+    if my_event.clipboardData and my_event.clipboardData.items
+      i = 0
+      while i < my_event.clipboardData.items.length
+        item = my_event.clipboardData.items[i]
+        processItem(my_event, item)
+        i++
+
+  processItem = (e, item) ->
+    if isImage(item)
+      filename = getFilename(e) or "image.png"
+      text = "{{" + filename + "}}"
+      pasteText(text)
+      uploadFile item.getAsFile(), filename
+    else if e.clipboardData.items.length == 1
+      text = e.clipboardData.getData("text/plain")
+      pasteText(text)
+
+  isImage = (item) ->
+    if item
+      item.type.indexOf("image") isnt -1
+
+  pasteText = (text) ->
+    caretStart = $(child)[0].selectionStart
+    caretEnd = $(child)[0].selectionEnd
+    textEnd = $(child).val().length
+
+    beforeSelection = $(child).val().substring 0, caretStart
+    afterSelection = $(child).val().substring caretEnd, textEnd
+    $(child).val beforeSelection + text + afterSelection
+    $(".markdown-area").trigger "input"
+
+  getFilename = (e) -> 
+    if window.clipboardData and window.clipboardData.getData
+      value = window.clipboardData.getData("Text")
+    else if e.clipboardData and e.clipboardData.getData
+      value = e.clipboardData.getData("text/plain")
+    
+    value = value.split("\r")
+    value.first()
+
+  uploadFile = (item, filename) ->
+    formData = new FormData()
+    formData.append "markdown_img", item, filename
+    $.ajax
+      url: project_image_path_upload
+      type: "POST"
+      data: formData
+      dataType: "json"
+      processData: false
+      contentType: false
+      headers:
+        "X-CSRF-Token": $("meta[name=\"csrf-token\"]").attr("content")
+
+      beforeSend: ->
+        showSpinner()
+        closeAlertMessage()
+
+      success: (e, textStatus, response) ->
+        insertToTextArea(filename, formatLink(response.responseJSON.link))
+      
+      error: (response) ->
+        showError(response.responseJSON.message)
+
+      complete: ->
+        closeSpinner()
+
+  insertToTextArea = (filename, url) ->
+    $(child).val (index, val) ->
+      val.replace("{{" + filename + "}}", url + "\n")
+
+  appendToTextArea = (url) ->
+    $(child).val (index, val) ->
+      val + url + "\n"
+
+  showSpinner = (e) ->
+    $(".div-dropzone-spinner").css "opacity", 0.7
+
+  closeSpinner = ->
+    $(".div-dropzone-spinner").css "opacity", 0
+
+  showError = (message) ->
+    checkIfMsgExists = $(".error-alert").children().length
+    if checkIfMsgExists is 0
+      $(".error-alert").append divAlert
+      $(".div-dropzone-alert").append btnAlert + message
+
+  closeAlertMessage = ->
+    $(".div-dropzone-alert").alert "close"
+
   $(".markdown-selector").click (e) ->
     e.preventDefault()
     $(".div-dropzone").click()
     return
 
+  $(".div-dropzone").on "paste", handlePaste
+
   return
\ No newline at end of file

app/assets/stylesheets/generic/markdown_area.scss

@@ -43,6 +43,11 @@
       display: none;
     }
   }
+  
+  .hint {
+    padding: 0;
+    margin: 0;
+  }
 }
 
 .div-dropzone-alert {

app/controllers/projects_controller.rb

@@ -11,6 +11,8 @@ class ProjectsController < ApplicationController
   layout 'navless', only: [:new, :create, :fork]
   before_filter :set_title, only: [:new, :create]
 
+  rescue_from CarrierWave::IntegrityError, with: :invalid_file
+
   def new
     @project = Project.new
   end
@@ -185,6 +187,10 @@ class ProjectsController < ApplicationController
     %w(png jpg jpeg gif)
   end
 
+  def invalid_file(error)
+    render json: { message: error.message }, status: :internal_server_error
+  end
+
   def set_title
     @title = 'New Project'
   end

app/views/projects/issues/_form.html.haml

@@ -23,7 +23,7 @@
         = f.text_area :description, class: 'form-control js-gfm-input markdown-area', rows: 14
         .col-sm-12.hint
           .pull-left Issues are parsed with #{link_to "GitLab Flavored Markdown", help_markdown_path, target: '_blank'}.
-          .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping or #{link_to "selecting them", '#', class: 'markdown-selector' }.
+          .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping, #{link_to "selecting them", '#', class: 'markdown-selector' } or pasting from the clipboard.
         .clearfix
         .error-alert
     %hr

app/views/projects/merge_requests/_form.html.haml

@@ -25,7 +25,8 @@
         = f.text_area :description, class: "form-control js-gfm-input markdown-area", rows: 14
         .col-sm-12.hint
           .pull-left Description is parsed with #{link_to "GitLab Flavored Markdown", help_markdown_path, target: '_blank'}.
-          .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping or #{link_to "selecting them", '#', class: 'markdown-selector' }.
+          .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping, #{link_to "selecting them", '#', class: 'markdown-selector' } or pasting from the clipboard.
+
         .clearfix
         .error-alert
     %hr

app/views/projects/merge_requests/_new_submit.html.haml

@@ -26,7 +26,8 @@
         = f.text_area :description, class: "form-control js-gfm-input markdown-area", rows: 10
         .col-sm-12.hint
           .pull-left Description is parsed with #{link_to "GitLab Flavored Markdown", help_markdown_path, target: '_blank'}.
-          .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping or #{link_to "selecting them", '#', class: 'markdown-selector' }.
+          .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping, #{link_to "selecting them", '#', class: 'markdown-selector' } or pasting from the clipboard.
+
         .clearfix
         .error-alert
       .form-group

app/views/projects/milestones/_form.html.haml

@@ -24,7 +24,7 @@
           = f.text_area :description, maxlength: 2000, class: "form-control markdown-area", rows: 10
           .hint
             .pull-left Milestones are parsed with #{link_to "GitLab Flavored Markdown", help_markdown_path, target: '_blank'}.
-            .pull-left Attach images (JPG, PNG, GIF) by dragging & dropping or #{link_to "selecting them", '#', class: 'markdown-selector' }.
+            .pull-left Attach images (JPG, PNG, GIF) by dragging & dropping, #{link_to "selecting them", '#', class: 'markdown-selector' } or pasting from the clipboard.
           .clearfix
           .error-alert
     .col-md-6

app/views/projects/notes/_form.html.haml

@@ -16,10 +16,10 @@
     .note-write-holder
       = f.text_area :note, size: 255, class: 'note_text js-note-text js-gfm-input markdown-area'
 
-      .light.clearfix
+      .light.clearfix.hint
         .pull-left Comments are parsed with #{link_to "GitLab Flavored Markdown", help_markdown_path, target: '_blank'}.
-        .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping or #{link_to "selecting them", '#', class: 'markdown-selector' }.
-
+        .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping, #{link_to "selecting them", '#', class: 'markdown-selector' } or pasting from the clipboard.      
+      .error-alert
     .note-preview-holder.hide
       .js-note-preview
 

app/views/projects/wikis/_form.html.haml

@@ -25,7 +25,8 @@
       = f.text_area :content, class: 'form-control js-gfm-input markdown-area', rows: 18
       .col-sm-12.hint
         .pull-left Wiki content is parsed with #{link_to "GitLab Flavored Markdown", help_markdown_path, target: '_blank'}.
-        .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping or #{link_to "selecting them", '#', class: 'markdown-selector' }.
+        .pull-right Attach images (JPG, PNG, GIF) by dragging & dropping, #{link_to "selecting them", '#', class: 'markdown-selector' } or pasting from the clipboard.
+
       .clearfix
       .error-alert
   .form-group