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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
interface nsITreeSelection;
interface mixin TreeView
{
/**
* The total number of rows in the tree (including the offscreen rows).
*/
readonly attribute long rowCount;
/**
* The selection for this view.
*/
[SetterThrows]
attribute nsITreeSelection? selection;
/**
* A whitespace delimited list of properties. For each property X the view
* gives back will cause the pseudoclasses ::-moz-tree-cell(x),
* ::-moz-tree-row(x), ::-moz-tree-twisty(x), ::-moz-tree-image(x),
* ::-moz-tree-cell-text(x). to be matched on the pseudoelement
* ::moz-tree-row.
*/
[Throws]
DOMString getRowProperties(long row);
/**
* A whitespace delimited list of properties for a given cell. Each
* property, x, that the view gives back will cause the pseudoclasses
* ::-moz-tree-cell(x), ::-moz-tree-row(x), ::-moz-tree-twisty(x),
* ::-moz-tree-image(x), ::-moz-tree-cell-text(x). to be matched on the
* cell.
*/
[Throws]
DOMString getCellProperties(long row, TreeColumn column);
/**
* Called to get properties to paint a column background. For shading the sort
* column, etc.
*/
DOMString getColumnProperties(TreeColumn column);
/**
* Methods that can be used to test whether or not a twisty should be drawn,
* and if so, whether an open or closed twisty should be used.
*/
[Throws]
boolean isContainer(long row);
[Throws]
boolean isContainerOpen(long row);
[Throws]
boolean isContainerEmpty(long row);
/**
* isSeparator is used to determine if the row is a separator.
* A value of true will result in the tree drawing a horizontal separator.
* The tree uses the ::moz-tree-separator pseudoclass to draw the separator.
*/
[Throws]
boolean isSeparator(long row);
/**
* Specifies if there is currently a sort on any column. Used mostly by dragdrop
* to affect drop feedback.
*/
boolean isSorted();
const short DROP_BEFORE = -1;
const short DROP_ON = 0;
const short DROP_AFTER = 1;
/**
* Methods used by the drag feedback code to determine if a drag is allowable at
* the current location. To get the behavior where drops are only allowed on
* items, such as the mailNews folder pane, always return false when
* the orientation is not DROP_ON.
*/
[Throws]
boolean canDrop(long row, long orientation, DataTransfer? dataTransfer);
/**
* Called when the user drops something on this view. The |orientation| param
* specifies before/on/after the given |row|.
*/
[Throws]
void drop(long row, long orientation, DataTransfer? dataTransfer);
/**
* Methods used by the tree to draw thread lines in the tree.
* getParentIndex is used to obtain the index of a parent row.
* If there is no parent row, getParentIndex returns -1.
*/
[Throws]
long getParentIndex(long row);
/**
* hasNextSibling is used to determine if the row at rowIndex has a nextSibling
* that occurs *after* the index specified by afterIndex. Code that is forced
* to march down the view looking at levels can optimize the march by starting
* at afterIndex+1.
*/
[Throws]
boolean hasNextSibling(long row, long afterIndex);
/**
* The level is an integer value that represents
* the level of indentation. It is multiplied by the width specified in the
* :moz-tree-indentation pseudoelement to compute the exact indendation.
*/
[Throws]
long getLevel(long row);
/**
* The image path for a given cell. For defining an icon for a cell.
* If the empty string is returned, the :moz-tree-image pseudoelement
* will be used.
*/
[Throws]
DOMString getImageSrc(long row, TreeColumn column);
/**
* The value for a given cell. This method is only called for columns
* of type other than |text|.
*/
[Throws]
DOMString getCellValue(long row, TreeColumn column);
/**
* The text for a given cell. If a column consists only of an image, then
* the empty string is returned.
*/
[Throws]
DOMString getCellText(long row, TreeColumn column);
/**
* Called during initialization to link the view to the front end box object.
*/
[Throws]
void setTree(XULTreeElement? tree);
/**
* Called on the view when an item is opened or closed.
*/
[Throws]
void toggleOpenState(long row);
/**
* Called on the view when a header is clicked.
*/
[Throws]
void cycleHeader(TreeColumn column);
/**
* Should be called from a XUL onselect handler whenever the selection changes.
*/
void selectionChanged();
/**
* Called on the view when a cell in a non-selectable cycling column (e.g., unread/flag/etc.) is clicked.
*/
void cycleCell(long row, TreeColumn column);
/**
* isEditable is called to ask the view if the cell contents are editable.
* A value of true will result in the tree popping up a text field when
* the user tries to inline edit the cell.
*/
[Throws]
boolean isEditable(long row, TreeColumn column);
/**
* setCellValue is called when the value of the cell has been set by the user.
* This method is only called for columns of type other than |text|.
*/
[Throws]
void setCellValue(long row, TreeColumn column, DOMString value);
/**
* setCellText is called when the contents of the cell have been edited by the user.
*/
[Throws]
void setCellText(long row, TreeColumn column, DOMString value);
};