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mxGraphView.js
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3016 lines (2630 loc) · 72.6 KB
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/**
* Copyright (c) 2006-2015, JGraph Ltd
* Copyright (c) 2006-2015, Gaudenz Alder
*/
/**
* Class: mxGraphView
*
* Extends <mxEventSource> to implement a view for a graph. This class is in
* charge of computing the absolute coordinates for the relative child
* geometries, the points for perimeters and edge styles and keeping them
* cached in <mxCellStates> for faster retrieval. The states are updated
* whenever the model or the view state (translate, scale) changes. The scale
* and translate are honoured in the bounds.
*
* Event: mxEvent.UNDO
*
* Fires after the root was changed in <setCurrentRoot>. The <code>edit</code>
* property contains the <mxUndoableEdit> which contains the
* <mxCurrentRootChange>.
*
* Event: mxEvent.SCALE_AND_TRANSLATE
*
* Fires after the scale and translate have been changed in <scaleAndTranslate>.
* The <code>scale</code>, <code>previousScale</code>, <code>translate</code>
* and <code>previousTranslate</code> properties contain the new and previous
* scale and translate, respectively.
*
* Event: mxEvent.SCALE
*
* Fires after the scale was changed in <setScale>. The <code>scale</code> and
* <code>previousScale</code> properties contain the new and previous scale.
*
* Event: mxEvent.TRANSLATE
*
* Fires after the translate was changed in <setTranslate>. The
* <code>translate</code> and <code>previousTranslate</code> properties contain
* the new and previous value for translate.
*
* Event: mxEvent.DOWN and mxEvent.UP
*
* Fire if the current root is changed by executing an <mxCurrentRootChange>.
* The event name depends on the location of the root in the cell hierarchy
* with respect to the current root. The <code>root</code> and
* <code>previous</code> properties contain the new and previous root,
* respectively.
*
* Constructor: mxGraphView
*
* Constructs a new view for the given <mxGraph>.
*
* Parameters:
*
* graph - Reference to the enclosing <mxGraph>.
*/
function mxGraphView(graph)
{
this.graph = graph;
this.translate = new mxPoint();
this.graphBounds = new mxRectangle();
this.states = new mxDictionary();
};
/**
* Extends mxEventSource.
*/
mxGraphView.prototype = new mxEventSource();
mxGraphView.prototype.constructor = mxGraphView;
/**
*
*/
mxGraphView.prototype.EMPTY_POINT = new mxPoint();
/**
* Variable: doneResource
*
* Specifies the resource key for the status message after a long operation.
* If the resource for this key does not exist then the value is used as
* the status message. Default is 'done'.
*/
mxGraphView.prototype.doneResource = (mxClient.language != 'none') ? 'done' : '';
/**
* Function: updatingDocumentResource
*
* Specifies the resource key for the status message while the document is
* being updated. If the resource for this key does not exist then the
* value is used as the status message. Default is 'updatingDocument'.
*/
mxGraphView.prototype.updatingDocumentResource = (mxClient.language != 'none') ? 'updatingDocument' : '';
/**
* Variable: allowEval
*
* Specifies if string values in cell styles should be evaluated using
* <mxUtils.eval>. This will only be used if the string values can't be mapped
* to objects using <mxStyleRegistry>. Default is false. NOTE: Enabling this
* switch carries a possible security risk.
*/
mxGraphView.prototype.allowEval = false;
/**
* Variable: captureDocumentGesture
*
* Specifies if a gesture should be captured when it goes outside of the
* graph container. Default is true.
*/
mxGraphView.prototype.captureDocumentGesture = true;
/**
* Variable: optimizeVmlReflows
*
* Specifies if the <canvas> should be hidden while rendering in IE8 standards
* mode and quirks mode. This will significantly improve rendering performance.
* Default is true.
*/
mxGraphView.prototype.optimizeVmlReflows = true;
/**
* Variable: rendering
*
* Specifies if shapes should be created, updated and destroyed using the
* methods of <mxCellRenderer> in <graph>. Default is true.
*/
mxGraphView.prototype.rendering = true;
/**
* Variable: graph
*
* Reference to the enclosing <mxGraph>.
*/
mxGraphView.prototype.graph = null;
/**
* Variable: currentRoot
*
* <mxCell> that acts as the root of the displayed cell hierarchy.
*/
mxGraphView.prototype.currentRoot = null;
/**
* Variable: graphBounds
*
* <mxRectangle> that caches the scales, translated bounds of the current view.
*/
mxGraphView.prototype.graphBounds = null;
/**
* Variable: scale
*
* Specifies the scale. Default is 1 (100%).
*/
mxGraphView.prototype.scale = 1;
/**
* Variable: translate
*
* <mxPoint> that specifies the current translation. Default is a new
* empty <mxPoint>.
*/
mxGraphView.prototype.translate = null;
/**
* Variable: states
*
* <mxDictionary> that maps from cell IDs to <mxCellStates>.
*/
mxGraphView.prototype.states = null;
/**
* Variable: updateStyle
*
* Specifies if the style should be updated in each validation step. If this
* is false then the style is only updated if the state is created or if the
* style of the cell was changed. Default is false.
*/
mxGraphView.prototype.updateStyle = false;
/**
* Variable: lastNode
*
* During validation, this contains the last DOM node that was processed.
*/
mxGraphView.prototype.lastNode = null;
/**
* Variable: lastHtmlNode
*
* During validation, this contains the last HTML DOM node that was processed.
*/
mxGraphView.prototype.lastHtmlNode = null;
/**
* Variable: lastForegroundNode
*
* During validation, this contains the last edge's DOM node that was processed.
*/
mxGraphView.prototype.lastForegroundNode = null;
/**
* Variable: lastForegroundHtmlNode
*
* During validation, this contains the last edge HTML DOM node that was processed.
*/
mxGraphView.prototype.lastForegroundHtmlNode = null;
/**
* Function: getGraphBounds
*
* Returns <graphBounds>.
*/
mxGraphView.prototype.getGraphBounds = function()
{
return this.graphBounds;
};
/**
* Function: setGraphBounds
*
* Sets <graphBounds>.
*/
mxGraphView.prototype.setGraphBounds = function(value)
{
this.graphBounds = value;
};
/**
* Function: getBounds
*
* Returns the union of all <mxCellStates> for the given array of <mxCells>.
*
* Parameters:
*
* cells - Array of <mxCells> whose bounds should be returned.
*/
mxGraphView.prototype.getBounds = function(cells)
{
var result = null;
if (cells != null && cells.length > 0)
{
var model = this.graph.getModel();
for (var i = 0; i < cells.length; i++)
{
if (model.isVertex(cells[i]) || model.isEdge(cells[i]))
{
var state = this.getState(cells[i]);
if (state != null)
{
if (result == null)
{
result = mxRectangle.fromRectangle(state);
}
else
{
result.add(state);
}
}
}
}
}
return result;
};
/**
* Function: setCurrentRoot
*
* Sets and returns the current root and fires an <undo> event before
* calling <mxGraph.sizeDidChange>.
*
* Parameters:
*
* root - <mxCell> that specifies the root of the displayed cell hierarchy.
*/
mxGraphView.prototype.setCurrentRoot = function(root)
{
if (this.currentRoot != root)
{
var change = new mxCurrentRootChange(this, root);
change.execute();
var edit = new mxUndoableEdit(this, true);
edit.add(change);
this.fireEvent(new mxEventObject(mxEvent.UNDO, 'edit', edit));
this.graph.sizeDidChange();
}
return root;
};
/**
* Function: scaleAndTranslate
*
* Sets the scale and translation and fires a <scale> and <translate> event
* before calling <revalidate> followed by <mxGraph.sizeDidChange>.
*
* Parameters:
*
* scale - Decimal value that specifies the new scale (1 is 100%).
* dx - X-coordinate of the translation.
* dy - Y-coordinate of the translation.
*/
mxGraphView.prototype.scaleAndTranslate = function(scale, dx, dy)
{
var previousScale = this.scale;
var previousTranslate = new mxPoint(this.translate.x, this.translate.y);
if (this.scale != scale || this.translate.x != dx || this.translate.y != dy)
{
this.scale = scale;
this.translate.x = dx;
this.translate.y = dy;
if (this.isEventsEnabled())
{
this.viewStateChanged();
}
}
this.fireEvent(new mxEventObject(mxEvent.SCALE_AND_TRANSLATE,
'scale', scale, 'previousScale', previousScale,
'translate', this.translate, 'previousTranslate', previousTranslate));
};
/**
* Function: getScale
*
* Returns the <scale>.
*/
mxGraphView.prototype.getScale = function()
{
return this.scale;
};
/**
* Function: setScale
*
* Sets the scale and fires a <scale> event before calling <revalidate> followed
* by <mxGraph.sizeDidChange>.
*
* Parameters:
*
* value - Decimal value that specifies the new scale (1 is 100%).
*/
mxGraphView.prototype.setScale = function(value)
{
var previousScale = this.scale;
if (this.scale != value)
{
this.scale = value;
if (this.isEventsEnabled())
{
this.viewStateChanged();
}
}
this.fireEvent(new mxEventObject(mxEvent.SCALE,
'scale', value, 'previousScale', previousScale));
};
/**
* Function: getTranslate
*
* Returns the <translate>.
*/
mxGraphView.prototype.getTranslate = function()
{
return this.translate;
};
/**
* Function: setTranslate
*
* Sets the translation and fires a <translate> event before calling
* <revalidate> followed by <mxGraph.sizeDidChange>. The translation is the
* negative of the origin.
*
* Parameters:
*
* dx - X-coordinate of the translation.
* dy - Y-coordinate of the translation.
*/
mxGraphView.prototype.setTranslate = function(dx, dy)
{
var previousTranslate = new mxPoint(this.translate.x, this.translate.y);
if (this.translate.x != dx || this.translate.y != dy)
{
this.translate.x = dx;
this.translate.y = dy;
if (this.isEventsEnabled())
{
this.viewStateChanged();
}
}
this.fireEvent(new mxEventObject(mxEvent.TRANSLATE,
'translate', this.translate, 'previousTranslate', previousTranslate));
};
/**
* Function: viewStateChanged
*
* Invoked after <scale> and/or <translate> has changed.
*/
mxGraphView.prototype.viewStateChanged = function()
{
this.revalidate();
this.graph.sizeDidChange();
};
/**
* Function: refresh
*
* Clears the view if <currentRoot> is not null and revalidates.
*/
mxGraphView.prototype.refresh = function()
{
if (this.currentRoot != null)
{
this.clear();
}
this.revalidate();
};
/**
* Function: revalidate
*
* Revalidates the complete view with all cell states.
*/
mxGraphView.prototype.revalidate = function()
{
this.invalidate();
this.validate();
};
/**
* Function: clear
*
* Removes the state of the given cell and all descendants if the given
* cell is not the current root.
*
* Parameters:
*
* cell - Optional <mxCell> for which the state should be removed. Default
* is the root of the model.
* force - Boolean indicating if the current root should be ignored for
* recursion.
*/
mxGraphView.prototype.clear = function(cell, force, recurse)
{
var model = this.graph.getModel();
cell = cell || model.getRoot();
force = (force != null) ? force : false;
recurse = (recurse != null) ? recurse : true;
this.removeState(cell);
if (recurse && (force || cell != this.currentRoot))
{
var childCount = model.getChildCount(cell);
for (var i = 0; i < childCount; i++)
{
this.clear(model.getChildAt(cell, i), force);
}
}
else
{
this.invalidate(cell);
}
};
/**
* Function: invalidate
*
* Invalidates the state of the given cell, all its descendants and
* connected edges.
*
* Parameters:
*
* cell - Optional <mxCell> to be invalidated. Default is the root of the
* model.
*/
mxGraphView.prototype.invalidate = function(cell, recurse, includeEdges)
{
var model = this.graph.getModel();
cell = cell || model.getRoot();
recurse = (recurse != null) ? recurse : true;
includeEdges = (includeEdges != null) ? includeEdges : true;
var state = this.getState(cell);
if (state != null)
{
state.invalid = true;
}
// Avoids infinite loops for invalid graphs
if (!cell.invalidating)
{
cell.invalidating = true;
// Recursively invalidates all descendants
if (recurse)
{
var childCount = model.getChildCount(cell);
for (var i = 0; i < childCount; i++)
{
var child = model.getChildAt(cell, i);
this.invalidate(child, recurse, includeEdges);
}
}
// Propagates invalidation to all connected edges
if (includeEdges)
{
var edgeCount = model.getEdgeCount(cell);
for (var i = 0; i < edgeCount; i++)
{
this.invalidate(model.getEdgeAt(cell, i), recurse, includeEdges);
}
}
delete cell.invalidating;
}
};
/**
* Function: validate
*
* Calls <validateCell> and <validateCellState> and updates the <graphBounds>
* using <getBoundingBox>. Finally the background is validated using
* <validateBackground>.
*
* Parameters:
*
* cell - Optional <mxCell> to be used as the root of the validation.
* Default is <currentRoot> or the root of the model.
*/
mxGraphView.prototype.validate = function(cell)
{
var t0 = mxLog.enter('mxGraphView.validate');
window.status = mxResources.get(this.updatingDocumentResource) ||
this.updatingDocumentResource;
this.resetValidationState();
// Improves IE rendering speed by minimizing reflows
var prevDisplay = null;
if (this.optimizeVmlReflows && this.canvas != null && this.textDiv == null &&
((document.documentMode == 8 && !mxClient.IS_EM) || mxClient.IS_QUIRKS))
{
// Placeholder keeps scrollbar positions when canvas is hidden
this.placeholder = document.createElement('div');
this.placeholder.style.position = 'absolute';
this.placeholder.style.width = this.canvas.clientWidth + 'px';
this.placeholder.style.height = this.canvas.clientHeight + 'px';
this.canvas.parentNode.appendChild(this.placeholder);
prevDisplay = this.drawPane.style.display;
this.canvas.style.display = 'none';
// Creates temporary DIV used for text measuring in mxText.updateBoundingBox
this.textDiv = document.createElement('div');
this.textDiv.style.position = 'absolute';
this.textDiv.style.whiteSpace = 'nowrap';
this.textDiv.style.visibility = 'hidden';
this.textDiv.style.display = (mxClient.IS_QUIRKS) ? 'inline' : 'inline-block';
this.textDiv.style.zoom = '1';
document.body.appendChild(this.textDiv);
}
var graphBounds = this.getBoundingBox(this.validateCellState(
this.validateCell(cell || ((this.currentRoot != null) ?
this.currentRoot : this.graph.getModel().getRoot()))));
this.setGraphBounds((graphBounds != null) ? graphBounds : this.getEmptyBounds());
this.validateBackground();
if (prevDisplay != null)
{
this.canvas.style.display = prevDisplay;
this.textDiv.parentNode.removeChild(this.textDiv);
if (this.placeholder != null)
{
this.placeholder.parentNode.removeChild(this.placeholder);
}
// Textdiv cannot be reused
this.textDiv = null;
}
this.resetValidationState();
window.status = mxResources.get(this.doneResource) ||
this.doneResource;
mxLog.leave('mxGraphView.validate', t0);
};
/**
* Function: getEmptyBounds
*
* Returns the bounds for an empty graph. This returns a rectangle at
* <translate> with the size of 0 x 0.
*/
mxGraphView.prototype.getEmptyBounds = function()
{
return new mxRectangle(this.translate.x * this.scale, this.translate.y * this.scale);
};
/**
* Function: getBoundingBox
*
* Returns the bounding box of the shape and the label for the given
* <mxCellState> and its children if recurse is true.
*
* Parameters:
*
* state - <mxCellState> whose bounding box should be returned.
* recurse - Optional boolean indicating if the children should be included.
* Default is true.
*/
mxGraphView.prototype.getBoundingBox = function(state, recurse)
{
recurse = (recurse != null) ? recurse : true;
var bbox = null;
if (state != null)
{
if (state.shape != null && state.shape.boundingBox != null)
{
bbox = state.shape.boundingBox.clone();
}
// Adds label bounding box to graph bounds
if (state.text != null && state.text.boundingBox != null)
{
if (bbox != null)
{
bbox.add(state.text.boundingBox);
}
else
{
bbox = state.text.boundingBox.clone();
}
}
if (recurse)
{
var model = this.graph.getModel();
var childCount = model.getChildCount(state.cell);
for (var i = 0; i < childCount; i++)
{
var bounds = this.getBoundingBox(this.getState(model.getChildAt(state.cell, i)));
if (bounds != null)
{
if (bbox == null)
{
bbox = bounds;
}
else
{
bbox.add(bounds);
}
}
}
}
}
return bbox;
};
/**
* Function: createBackgroundPageShape
*
* Creates and returns the shape used as the background page.
*
* Parameters:
*
* bounds - <mxRectangle> that represents the bounds of the shape.
*/
mxGraphView.prototype.createBackgroundPageShape = function(bounds)
{
return new mxRectangleShape(bounds, 'white', 'black');
};
/**
* Function: validateBackground
*
* Calls <validateBackgroundImage> and <validateBackgroundPage>.
*/
mxGraphView.prototype.validateBackground = function()
{
this.validateBackgroundImage();
this.validateBackgroundPage();
};
/**
* Function: validateBackgroundImage
*
* Validates the background image.
*/
mxGraphView.prototype.validateBackgroundImage = function()
{
var bg = this.graph.getBackgroundImage();
if (bg != null)
{
if (this.backgroundImage == null || this.backgroundImage.image != bg.src)
{
if (this.backgroundImage != null)
{
this.backgroundImage.destroy();
}
var bounds = new mxRectangle(0, 0, 1, 1);
this.backgroundImage = new mxImageShape(bounds, bg.src);
this.backgroundImage.dialect = this.graph.dialect;
this.backgroundImage.init(this.backgroundPane);
this.backgroundImage.redraw();
// Workaround for ignored event on background in IE8 standards mode
if (document.documentMode == 8 && !mxClient.IS_EM)
{
mxEvent.addGestureListeners(this.backgroundImage.node,
mxUtils.bind(this, function(evt)
{
this.graph.fireMouseEvent(mxEvent.MOUSE_DOWN, new mxMouseEvent(evt));
}),
mxUtils.bind(this, function(evt)
{
this.graph.fireMouseEvent(mxEvent.MOUSE_MOVE, new mxMouseEvent(evt));
}),
mxUtils.bind(this, function(evt)
{
this.graph.fireMouseEvent(mxEvent.MOUSE_UP, new mxMouseEvent(evt));
})
);
}
}
this.redrawBackgroundImage(this.backgroundImage, bg);
}
else if (this.backgroundImage != null)
{
this.backgroundImage.destroy();
this.backgroundImage = null;
}
};
/**
* Function: validateBackgroundPage
*
* Validates the background page.
*/
mxGraphView.prototype.validateBackgroundPage = function()
{
if (this.graph.pageVisible)
{
var bounds = this.getBackgroundPageBounds();
if (this.backgroundPageShape == null)
{
this.backgroundPageShape = this.createBackgroundPageShape(bounds);
this.backgroundPageShape.scale = this.scale;
this.backgroundPageShape.isShadow = true;
this.backgroundPageShape.dialect = this.graph.dialect;
this.backgroundPageShape.init(this.backgroundPane);
this.backgroundPageShape.redraw();
// Adds listener for double click handling on background
if (this.graph.nativeDblClickEnabled)
{
mxEvent.addListener(this.backgroundPageShape.node, 'dblclick', mxUtils.bind(this, function(evt)
{
this.graph.dblClick(evt);
}));
}
// Adds basic listeners for graph event dispatching outside of the
// container and finishing the handling of a single gesture
mxEvent.addGestureListeners(this.backgroundPageShape.node,
mxUtils.bind(this, function(evt)
{
this.graph.fireMouseEvent(mxEvent.MOUSE_DOWN, new mxMouseEvent(evt));
}),
mxUtils.bind(this, function(evt)
{
// Hides the tooltip if mouse is outside container
if (this.graph.tooltipHandler != null && this.graph.tooltipHandler.isHideOnHover())
{
this.graph.tooltipHandler.hide();
}
if (this.graph.isMouseDown && !mxEvent.isConsumed(evt))
{
this.graph.fireMouseEvent(mxEvent.MOUSE_MOVE, new mxMouseEvent(evt));
}
}),
mxUtils.bind(this, function(evt)
{
this.graph.fireMouseEvent(mxEvent.MOUSE_UP, new mxMouseEvent(evt));
})
);
}
else
{
this.backgroundPageShape.scale = this.scale;
this.backgroundPageShape.bounds = bounds;
this.backgroundPageShape.redraw();
}
}
else if (this.backgroundPageShape != null)
{
this.backgroundPageShape.destroy();
this.backgroundPageShape = null;
}
};
/**
* Function: getBackgroundPageBounds
*
* Returns the bounds for the background page.
*/
mxGraphView.prototype.getBackgroundPageBounds = function()
{
var fmt = this.graph.pageFormat;
var ps = this.scale * this.graph.pageScale;
var bounds = new mxRectangle(this.scale * this.translate.x, this.scale * this.translate.y,
fmt.width * ps, fmt.height * ps);
return bounds;
};
/**
* Function: redrawBackgroundImage
*
* Updates the bounds and redraws the background image.
*
* Example:
*
* If the background image should not be scaled, this can be replaced with
* the following.
*
* (code)
* mxGraphView.prototype.redrawBackground = function(backgroundImage, bg)
* {
* backgroundImage.bounds.x = this.translate.x;
* backgroundImage.bounds.y = this.translate.y;
* backgroundImage.bounds.width = bg.width;
* backgroundImage.bounds.height = bg.height;
*
* backgroundImage.redraw();
* };
* (end)
*
* Parameters:
*
* backgroundImage - <mxImageShape> that represents the background image.
* bg - <mxImage> that specifies the image and its dimensions.
*/
mxGraphView.prototype.redrawBackgroundImage = function(backgroundImage, bg)
{
backgroundImage.scale = this.scale;
backgroundImage.bounds.x = this.scale * this.translate.x;
backgroundImage.bounds.y = this.scale * this.translate.y;
backgroundImage.bounds.width = this.scale * bg.width;
backgroundImage.bounds.height = this.scale * bg.height;
backgroundImage.redraw();
};
/**
* Function: validateCell
*
* Recursively creates the cell state for the given cell if visible is true and
* the given cell is visible. If the cell is not visible but the state exists
* then it is removed using <removeState>.
*
* Parameters:
*
* cell - <mxCell> whose <mxCellState> should be created.
* visible - Optional boolean indicating if the cell should be visible. Default
* is true.
*/
mxGraphView.prototype.validateCell = function(cell, visible)
{
visible = (visible != null) ? visible : true;
if (cell != null)
{
visible = visible && this.graph.isCellVisible(cell);
var state = this.getState(cell, visible);
if (state != null && !visible)
{
this.removeState(cell);
}
else
{
var model = this.graph.getModel();
var childCount = model.getChildCount(cell);
for (var i = 0; i < childCount; i++)
{
this.validateCell(model.getChildAt(cell, i), visible &&
(!this.isCellCollapsed(cell) || cell == this.currentRoot));
}
}
}
return cell;
};
/**
* Function: validateCellState
*
* Validates and repaints the <mxCellState> for the given <mxCell>.
*
* Parameters:
*
* cell - <mxCell> whose <mxCellState> should be validated.
* recurse - Optional boolean indicating if the children of the cell should be
* validated. Default is true.
*/
mxGraphView.prototype.validateCellState = function(cell, recurse)
{
recurse = (recurse != null) ? recurse : true;
var state = null;
if (cell != null)
{
state = this.getState(cell);
if (state != null)
{
var model = this.graph.getModel();
if (state.invalid)
{
state.invalid = false;
if (state.style == null || state.invalidStyle)
{
state.style = this.graph.getCellStyle(state.cell);
state.invalidStyle = false;
}
if (cell != this.currentRoot)
{
this.validateCellState(model.getParent(cell), false);
}
state.setVisibleTerminalState(this.validateCellState(this.getVisibleTerminal(cell, true), false), true);
state.setVisibleTerminalState(this.validateCellState(this.getVisibleTerminal(cell, false), false), false);
this.updateCellState(state);
// Repaint happens immediately after the cell is validated
if (cell != this.currentRoot && !state.invalid)
{
this.graph.cellRenderer.redraw(state, false, this.isRendering());
// Handles changes to invertex paintbounds after update of rendering shape
state.updateCachedBounds();
}
}
if (recurse && !state.invalid)
{
// Updates order in DOM if recursively traversing
if (state.shape != null)
{
this.stateValidated(state);
}
var childCount = model.getChildCount(cell);
for (var i = 0; i < childCount; i++)
{
this.validateCellState(model.getChildAt(cell, i));
}
}
}
}