Remove the "Copy" code, it's been replaced by "to hash".

[dygraphs.git] / experimental / palette / palette.js

// Copyright (c) 2011 Google, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

/** 
 * @fileoverview Dygraphs options palette.
 *
 * @author konigsberg@google.com (Robert Konigsberg)
 */
"use strict";

/**
 * scope is either "global", "series", "x", "y" or "y2".
 */
function Palette(scope) {
  // Contains pair of "input" (the input object) and "row" (the parent row)
  // Also contains functionString.
  this.model = {};
  // This is meant to be overridden by a palette host.
  this.onchange = function() {};
  this.scope = scope;
  this.root = null;
}

Palette.createChild = function(type, parentElement, className) {
  var element = document.createElement(type);
  parentElement.appendChild(element);
  if (className) {
    element.className = className;
  }
  return element;
};

Palette.prototype.create = function(parentElement) {
  var palette = this;

  var table = Palette.createChild("div", parentElement[0], "palette");
  this.root = table;
  table.width="300px";

  this.tooltip = new Tooltip();

  // Build the header
  var header = Palette.createChild("div", table, "header");
  header.style.visibility = "visible";

  // One row per option.
  for (var opt in opts) {
    try {
      if (opts.hasOwnProperty(opt)) {
        var type = opts[opt].type;

        var scope = opts[opt].scope || [ "global" ]; // Scope can be empty, infer "global" only.
        var valid = scope[0] == "*" || $.inArray(this.scope, scope) >= 0;
        if (!valid) {
          continue;
        }

        var isFunction = type.indexOf("function(") == 0;
        var row = Palette.createChild("div", table);
        row.onmouseover = function(source, title, type, body) {
          return function() {
            palette.tooltip.show(source, title, type, body);
          };
        } (row, opt, type, Dygraph.OPTIONS_REFERENCE[opt].description);
        row.onmouseout = function() { palette.tooltip.hide(); };

        var div = Palette.createChild("span", row, "name");
        div.textContent = opt;

        var value = Palette.createChild("span", row, "option");

        if (isFunction) {
           var input = Palette.createChild("button", value);
           input.onclick = function(opt, palette) {
             return function(event) {
               var entry = palette.model[opt];
               var inputValue = entry.functionString;
               if (inputValue == null || inputValue.length == 0) {
                 inputValue = opts[opt].type + "{\n\n}";
               }
        	     var textarea = new TextArea();
        	     textarea.show(opt, inputValue);
        	     textarea.okCallback = function(value) {
                 if (value != inputValue) {
                   entry.functionString = value;
                   entry.input.textContent = value ? "defined" : "not defined";
                   palette.onchange();
                 }
               }
             }
           }(opt, this);
        } else if (type == "boolean") {
           var input = Palette.createChild("button", value);
           input.onclick = function(e) {
             var btn = e.target;
             if (btn.value == "none") {
               Palette.populateBooleanButton(btn, "true");
             } else if (btn.value == "true") {
               Palette.populateBooleanButton(btn, "false");
             } else {
               Palette.populateBooleanButton(btn, "none");
             }
             palette.onchange();
           };
        } else {
          var input = Palette.createChild("input", value, "textInput");
          input.type="text";
          input.onkeypress = function(event) {
            var keycode = event.which;
            if (keycode == 13 || keycode == 8) {
              palette.onchange();
            }
          }
        }
        this.model[opt] = { input: input, row: row };
      }
    } catch(err) {
      throw "For option " + opt + ":" + err;
    }
  }
  this.filter("");
}

// TODO: replace semicolon parsing with comma parsing, and supporting quotes.
Palette.parseStringArray = function(value) {
  if (value == null || value.length == 0) {
    return null;
  }
  return value.split(";");
}

Palette.parseBooleanArray = function(value) {
  if (value == null || value.length == 0) {
    return null;
  }
  return value.split(',').map(function(x) { return x.trim() == "true"; });
}

Palette.parseFloatArray = function(value) {
  if (value == null || value.length == 0) {
    return null;
  }
  return value.split(',').map(function(x) { return parseFloat(x); });
}

Palette.parseIntArray = function(value) {
  if (value == null || value.length == 0) {
    return null;
  }
  return value.split(',').map(function(x) { return parseInt(x); });
}

Palette.prototype.read = function() {
  var results = {};
  for (var opt in this.model) {
    if (this.model.hasOwnProperty(opt)) {
      var type = opts[opt].type;
      var isFunction = type.indexOf("function(") == 0;
      var input = this.model[opt].input;
      var value = isFunction ? this.model[opt].functionString : input.value;
      if (value && value.length != 0) {
        if (type == "boolean") {
          if (value == "false") {
            results[opt] = false;
          }
          if (value == "true") {
            results[opt] = true;
          }
          // Ignore value == "none"
        } else if (type == "int") {
          results[opt] = parseInt(value);
        } else if (type == "float") {
          results[opt] = parseFloat(value);
        } else if (type == "array<string>") {
          results[opt] = Palette.parseStringArray(value);
        } else if (type == "array<float>") {
          results[opt] = Palette.parseFloatArray(value);
        } else if (type == "array<boolean>") {
          results[opt] = Palette.parseBooleanArray(value);
        } else if (type == "array<int>") {
          results[opt] = Palette.parseIntArray(value);
        } else if (type == "array<Date>") {
          results[opt] = Palette.parseIntArray(value);
        } else if (isFunction) {
          var localVariable = null;
          eval("localVariable = " + value);
          results[opt] = localVariable;
        } else {
          results[opt] = value;
        }
      }
    }
  }
  return results;
}

/**
 * Write to input elements.
 */
Palette.prototype.write = function(hash) {
  var results = {};
  for (var opt in this.model) {
    if (this.model.hasOwnProperty(opt)) {
      var input = this.model[opt].input;
      var type = opts[opt].type;
      var value = hash[opt];
      if (type == "boolean") {
        var text = value == true ? "true" : (value == false ? "false" : "none");
        Palette.populateBooleanButton(input, text);
      } else if (type == "array<string>") {
        if (value) {
          input.value = value.join("; ");
        }
      } else if (type.indexOf("array") == 0) {
        if (value) {
          input.value = value.join(", ");
        }
      } else if (type.indexOf("function(") == 0) {
        input.textContent = value ? "defined" : "not defined";
        this.model[opt].functionString = value ? value.toString() : null;
      } else {
        if (value != undefined) {
          input.value = value;
        }
      }
    }
  }
}

Palette.populateBooleanButton = function(button, value) {
  button.innerHTML = value;
  button.value = value;
}

Palette.prototype.filter = function(pattern) {
  pattern = pattern.toLowerCase();
  var even = true;
  for (var opt in this.model) {
    if (this.model.hasOwnProperty(opt)) {
      var row = this.model[opt].row;
      var matches = opt.toLowerCase().indexOf(pattern) >= 0;
      row.style.display = matches ? "block" : "none";
      if (matches) {
        row.className = even ? "even" : "odd";
        even = !even;
      }
    }
  }
}