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   1  // This file is part of Moodle - http://moodle.org/
   2  //
   3  // Moodle is free software: you can redistribute it and/or modify
   4  // it under the terms of the GNU General Public License as published by
   5  // the Free Software Foundation, either version 3 of the License, or
   6  // (at your option) any later version.
   7  //
   8  // Moodle is distributed in the hope that it will be useful,
   9  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  // GNU General Public License for more details.
  12  //
  13  // You should have received a copy of the GNU General Public License
  14  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  15  
  16  /**
  17   * Provides an in browser PDF editor.
  18   *
  19   * @module moodle-assignfeedback_editpdf-editor
  20   */
  21  
  22  /**
  23   * Class representing a stamp.
  24   *
  25   * @namespace M.assignfeedback_editpdf
  26   * @class annotationstamp
  27   * @extends M.assignfeedback_editpdf.annotation
  28   */
  29  ANNOTATIONSTAMP = function(config) {
  30      ANNOTATIONSTAMP.superclass.constructor.apply(this, [config]);
  31  };
  32  
  33  ANNOTATIONSTAMP.NAME = "annotationstamp";
  34  ANNOTATIONSTAMP.ATTRS = {};
  35  
  36  Y.extend(ANNOTATIONSTAMP, M.assignfeedback_editpdf.annotation, {
  37      /**
  38       * Draw a stamp annotation
  39       * @protected
  40       * @method draw
  41       * @return M.assignfeedback_editpdf.drawable
  42       */
  43      draw : function() {
  44          var drawable = new M.assignfeedback_editpdf.drawable(this.editor),
  45              drawingregion = Y.one(SELECTOR.DRAWINGREGION),
  46              node,
  47              position;
  48  
  49          position = this.editor.get_window_coordinates(new M.assignfeedback_editpdf.point(this.x, this.y));
  50          node = Y.Node.create('<div/>');
  51          node.setStyles({
  52              'position': 'absolute',
  53              'display': 'inline-block',
  54              'backgroundImage': 'url(' + this.editor.get_stamp_image_url(this.path) + ')',
  55              'width': (this.endx - this.x),
  56              'height': (this.endy - this.y),
  57              'backgroundSize': '100% 100%',
  58              'zIndex': 50
  59          });
  60  
  61          drawingregion.append(node);
  62          node.setX(position.x);
  63          node.setY(position.y);
  64  
  65          // Pass throught the event handlers on the div.
  66          node.on('gesturemovestart', this.editor.edit_start, null, this.editor);
  67          node.on('gesturemove', this.editor.edit_move, null, this.editor);
  68          node.on('gesturemoveend', this.editor.edit_end, null, this.editor);
  69  
  70          drawable.nodes.push(node);
  71  
  72          this.drawable = drawable;
  73          return ANNOTATIONSTAMP.superclass.draw.apply(this);
  74      },
  75  
  76      /**
  77       * Draw the in progress edit.
  78       *
  79       * @public
  80       * @method draw_current_edit
  81       * @param M.assignfeedback_editpdf.edit edit
  82       */
  83      draw_current_edit : function(edit) {
  84          var bounds = new M.assignfeedback_editpdf.rect(),
  85              drawable = new M.assignfeedback_editpdf.drawable(this.editor),
  86              drawingregion = Y.one(SELECTOR.DRAWINGREGION),
  87              node,
  88              position;
  89  
  90          bounds.bound([edit.start, edit.end]);
  91          position = this.editor.get_window_coordinates(new M.assignfeedback_editpdf.point(bounds.x, bounds.y));
  92  
  93          node = Y.Node.create('<div/>');
  94          node.setStyles({
  95              'position': 'absolute',
  96              'display': 'inline-block',
  97              'backgroundImage': 'url(' + this.editor.get_stamp_image_url(edit.stamp) + ')',
  98              'width': bounds.width,
  99              'height': bounds.height,
 100              'backgroundSize': '100% 100%',
 101              'zIndex': 50
 102          });
 103  
 104          drawingregion.append(node);
 105          node.setX(position.x);
 106          node.setY(position.y);
 107  
 108          drawable.nodes.push(node);
 109  
 110          return drawable;
 111      },
 112  
 113      /**
 114       * Promote the current edit to a real annotation.
 115       *
 116       * @public
 117       * @method init_from_edit
 118       * @param M.assignfeedback_editpdf.edit edit
 119       * @return bool if width/height is more than min. required.
 120       */
 121      init_from_edit : function(edit) {
 122          var bounds = new M.assignfeedback_editpdf.rect();
 123          bounds.bound([edit.start, edit.end]);
 124  
 125          if (bounds.width < 40) {
 126              bounds.width = 40;
 127          }
 128          if (bounds.height < 40) {
 129              bounds.height = 40;
 130          }
 131          this.gradeid = this.editor.get('gradeid');
 132          this.pageno = this.editor.currentpage;
 133          this.x = bounds.x;
 134          this.y = bounds.y;
 135          this.endx = bounds.x + bounds.width;
 136          this.endy = bounds.y + bounds.height;
 137          this.colour = edit.annotationcolour;
 138          this.path = edit.stamp;
 139  
 140          // Min width and height is always more than 40px.
 141          return true;
 142      },
 143  
 144      /**
 145       * Move an annotation to a new location.
 146       * @public
 147       * @param int newx
 148       * @param int newy
 149       * @method move_annotation
 150       */
 151      move : function(newx, newy) {
 152          var diffx = newx - this.x,
 153              diffy = newy - this.y;
 154  
 155          this.x += diffx;
 156          this.y += diffy;
 157          this.endx += diffx;
 158          this.endy += diffy;
 159  
 160          if (this.drawable) {
 161              this.drawable.erase();
 162          }
 163          this.editor.drawables.push(this.draw());
 164      }
 165  
 166  });
 167  
 168  M.assignfeedback_editpdf = M.assignfeedback_editpdf || {};
 169  M.assignfeedback_editpdf.annotationstamp = ANNOTATIONSTAMP;