scratch-blocks/core/flyout_vertical.js

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/**
* @license
* Visual Blocks Editor
*
* Copyright 2011 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
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* @fileoverview Layout code for a vertical variant of the flyout.
* @author fenichel@google.com (Rachel Fenichel)
*/
'use strict';
goog.provide('Blockly.VerticalFlyout');
goog.require('Blockly.Block');
goog.require('Blockly.Comment');
goog.require('Blockly.Events');
goog.require('Blockly.Flyout');
goog.require('Blockly.FlyoutButton');
goog.require('Blockly.WorkspaceSvg');
goog.require('goog.dom');
goog.require('goog.events');
goog.require('goog.math.Rect');
goog.require('goog.userAgent');
/**
* Class for a flyout.
* @param {!Object} workspaceOptions Dictionary of options for the workspace.
* @extends {Blockly.Flyout}
* @constructor
*/
Blockly.VerticalFlyout = function(workspaceOptions) {
workspaceOptions.getMetrics = this.getMetrics_.bind(this);
workspaceOptions.setMetrics = this.setMetrics_.bind(this);
Blockly.VerticalFlyout.superClass_.constructor.call(this, workspaceOptions);
/**
* Flyout should be laid out horizontally vs vertically.
* @type {boolean}
* @private
*/
this.horizontalLayout_ = false;
/**
* List of checkboxes next to variable blocks.
* Each element is an object containing the SVG for the checkbox, a boolean
* for its checked state, and the block the checkbox is associated with.
* @type {!Array.<!Object>}
* @private
*/
this.checkboxes_ = [];
};
goog.inherits(Blockly.VerticalFlyout, Blockly.Flyout);
/**
* Does the flyout automatically close when a block is created?
* @type {boolean}
*/
Blockly.VerticalFlyout.prototype.autoClose = false;
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/**
* The width of the flyout, if not otherwise specified.
* @type {number}
*/
Blockly.VerticalFlyout.prototype.DEFAULT_WIDTH = 250;
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/**
* Size of a checkbox next to a variable reporter.
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE = 20;
/**
* Space above and around the checkbox.
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_MARGIN = Blockly.Flyout.prototype.MARGIN;
/**
* Total additional width of a row that contains a checkbox.
* @type {number}
* @const
*/
Blockly.VerticalFlyout.prototype.CHECKBOX_SPACE_X =
Blockly.VerticalFlyout.prototype.CHECKBOX_SIZE +
2 * Blockly.VerticalFlyout.prototype.CHECKBOX_MARGIN;
/**
* Initializes the flyout.
* @param {!Blockly.Workspace} targetWorkspace The workspace in which to create
* new blocks.
*/
Blockly.VerticalFlyout.prototype.init = function(targetWorkspace) {
Blockly.VerticalFlyout.superClass_.init.call(this, targetWorkspace);
this.workspace_.scale = targetWorkspace.scale;
};
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/**
* Creates the flyout's DOM. Only needs to be called once.
* @param {string} tagName HTML element
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* @return {!Element} The flyout's SVG group.
*/
Blockly.VerticalFlyout.prototype.createDom = function(tagName) {
Blockly.VerticalFlyout.superClass_.createDom.call(this, tagName);
/*
<defs>
<clipPath id="blocklyBlockMenuClipPath">
<rect id="blocklyBlockMenuClipRect" height="1147px"
width="248px" y="0" x="0">
</rect>
</clipPath>
</defs>
*/
this.defs_ = Blockly.utils.createSvgElement('defs', {}, this.svgGroup_);
var clipPath = Blockly.utils.createSvgElement('clipPath',
{'id':'blocklyBlockMenuClipPath'}, this.defs_);
this.clipRect_ = Blockly.utils.createSvgElement('rect',
{'id': 'blocklyBlockMenuClipRect',
'height': '0',
'width': '0',
'y': '0',
'x': '0'
},
clipPath);
this.workspace_.svgGroup_.setAttribute('clip-path',
'url(#blocklyBlockMenuClipPath)');
return this.svgGroup_;
};
/**
* Return an object with all the metrics required to size scrollbars for the
* flyout. The following properties are computed:
* .viewHeight: Height of the visible rectangle,
* .viewWidth: Width of the visible rectangle,
* .contentHeight: Height of the contents,
* .contentWidth: Width of the contents,
* .viewTop: Offset of top edge of visible rectangle from parent,
* .contentTop: Offset of the top-most content from the y=0 coordinate,
* .absoluteTop: Top-edge of view.
* .viewLeft: Offset of the left edge of visible rectangle from parent,
* .contentLeft: Offset of the left-most content from the x=0 coordinate,
* .absoluteLeft: Left-edge of view.
* @return {Object} Contains size and position metrics of the flyout.
* @private
*/
Blockly.VerticalFlyout.prototype.getMetrics_ = function() {
if (!this.isVisible()) {
// Flyout is hidden.
return null;
}
try {
var optionBox = this.workspace_.getCanvas().getBBox();
} catch (e) {
// Firefox has trouble with hidden elements (Bug 528969).
var optionBox = {height: 0, y: 0, width: 0, x: 0};
}
// Padding for the end of the scrollbar.
var absoluteTop = this.SCROLLBAR_PADDING;
var absoluteLeft = 0;
var viewHeight = this.height_ - 2 * this.SCROLLBAR_PADDING;
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var viewWidth = this.getWidth() - this.SCROLLBAR_PADDING;
var metrics = {
viewHeight: viewHeight,
viewWidth: viewWidth,
contentHeight: optionBox.height * this.workspace_.scale + 2 * this.MARGIN,
contentWidth: optionBox.width * this.workspace_.scale + 2 * this.MARGIN,
viewTop: -this.workspace_.scrollY,
viewLeft: -this.workspace_.scrollX,
contentTop: optionBox.y,
contentLeft: optionBox.x,
absoluteTop: absoluteTop,
absoluteLeft: absoluteLeft
};
return metrics;
};
/**
* Sets the translation of the flyout to match the scrollbars.
* @param {!Object} xyRatio Contains a y property which is a float
* between 0 and 1 specifying the degree of scrolling and a
* similar x property.
* @private
*/
Blockly.VerticalFlyout.prototype.setMetrics_ = function(xyRatio) {
var metrics = this.getMetrics_();
// This is a fix to an apparent race condition.
if (!metrics) {
return;
}
if (goog.isNumber(xyRatio.y)) {
this.workspace_.scrollY = -metrics.contentHeight * xyRatio.y;
}
this.workspace_.translate(this.workspace_.scrollX + metrics.absoluteLeft,
this.workspace_.scrollY + metrics.absoluteTop);
this.clipRect_.setAttribute('height', metrics.viewHeight + 'px');
this.clipRect_.setAttribute('width', metrics.viewWidth + 'px');
};
/**
* Move the flyout to the edge of the workspace.
*/
Blockly.VerticalFlyout.prototype.position = function() {
if (!this.isVisible()) {
return;
}
var targetWorkspaceMetrics = this.targetWorkspace_.getMetrics();
if (!targetWorkspaceMetrics) {
// Hidden components will return null.
return;
}
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// This version of the flyout does not change width to fit its contents.
// Instead it matches the width of its parent or uses a default value.
this.width_ = this.getWidth();
if (this.parentToolbox_) {
var x = this.parentToolbox_.HtmlDiv.offsetLeft;
var y = this.parentToolbox_.HtmlDiv.offsetTop +
this.parentToolbox_.getHeight();
} else {
var x = this.toolboxPosition_ == Blockly.TOOLBOX_AT_RIGHT ?
targetWorkspaceMetrics.viewWidth - this.width_ : 0;
var y = 0;
}
// Record the height for Blockly.Flyout.getMetrics_
this.height_ = targetWorkspaceMetrics.viewHeight - y;
this.setBackgroundPath_(this.width_, this.height_);
this.svgGroup_.setAttribute("width", this.width_);
this.svgGroup_.setAttribute("height", this.height_);
var transform = 'translate(' + x + 'px,' + y + 'px)';
this.svgGroup_.style.transform = transform;
// Update the scrollbar (if one exists).
if (this.scrollbar_) {
// Set the scrollbars origin to be the top left of the flyout.
this.scrollbar_.setOrigin(x, y);
this.scrollbar_.resize();
}
// The blocks need to be visible in order to be laid out and measured
// correctly, but we don't want the flyout to show up until it's properly
// sized. Opacity is set to zero in show().
this.svgGroup_.style.opacity = 1;
};
/**
* Create and set the path for the visible boundaries of the flyout.
* @param {number} width The width of the flyout, not including the
* rounded corners.
* @param {number} height The height of the flyout, not including
* rounded corners.
* @private
*/
Blockly.VerticalFlyout.prototype.setBackgroundPath_ = function(width, height) {
var atRight = this.toolboxPosition_ == Blockly.TOOLBOX_AT_RIGHT;
// Decide whether to start on the left or right.
var path = ['M ' + 0 + ',0'];
// Top.
path.push('h', width);
// Rounded corner.
path.push('a', this.CORNER_RADIUS, this.CORNER_RADIUS, 0, 0,
atRight ? 0 : 1,
atRight ? -this.CORNER_RADIUS : this.CORNER_RADIUS,
this.CORNER_RADIUS);
// Side closest to workspace.
path.push('v', Math.max(0, height - this.CORNER_RADIUS * 2));
// Rounded corner.
path.push('a', this.CORNER_RADIUS, this.CORNER_RADIUS, 0, 0,
atRight ? 0 : 1,
atRight ? this.CORNER_RADIUS : -this.CORNER_RADIUS,
this.CORNER_RADIUS);
// Bottom.
path.push('h', -width);
path.push('z');
this.svgBackground_.setAttribute('d', path.join(' '));
};
/**
* Scroll the flyout to the top.
*/
Blockly.VerticalFlyout.prototype.scrollToStart = function() {
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this.scrollbar_.set(0);
};
/**
* Scroll the flyout.
* @param {!Event} e Mouse wheel scroll event.
* @private
*/
Blockly.VerticalFlyout.prototype.wheel_ = function(e) {
var delta = e.deltaY;
if (delta) {
if (goog.userAgent.GECKO) {
// Firefox's deltas are a tenth that of Chrome/Safari.
delta *= 10;
}
var metrics = this.getMetrics_();
var pos = metrics.viewTop + delta;
var limit = metrics.contentHeight - metrics.viewHeight;
pos = Math.min(pos, limit);
pos = Math.max(pos, 0);
this.scrollbar_.set(pos);
// When the flyout moves from a wheel event, hide WidgetDiv and DropDownDiv.
Blockly.WidgetDiv.hide(true);
Blockly.DropDownDiv.hideWithoutAnimation();
}
// Don't scroll the page.
e.preventDefault();
// Don't propagate mousewheel event (zooming).
e.stopPropagation();
};
/**
* Delete blocks and background buttons from a previous showing of the flyout.
* @private
*/
Blockly.VerticalFlyout.prototype.clearOldBlocks_ = function() {
Blockly.VerticalFlyout.superClass_.clearOldBlocks_.call(this);
// Do the same for checkboxes.
for (var i = 0, elem; elem = this.checkboxes_[i]; i++) {
elem.block.flyoutCheckbox = null;
goog.dom.removeNode(elem.svgRoot);
}
this.checkboxes_ = [];
};
/**
* Add listeners to a block that has been added to the flyout.
* @param {Element} root The root node of the SVG group the block is in.
* @param {!Blockly.Block} block The block to add listeners for.
* @param {!Element} rect The invisible rectangle under the block that acts as
* a button for that block.
* @private
*/
Blockly.VerticalFlyout.prototype.addBlockListeners_ = function(root, block,
rect) {
Blockly.VerticalFlyout.superClass_.addBlockListeners_.call(this, root, block,
rect);
if (block.flyoutCheckbox) {
this.listeners_.push(Blockly.bindEvent_(block.flyoutCheckbox.svgRoot,
'mousedown', null, this.checkboxClicked_(block.flyoutCheckbox)));
}
};
/**
* Lay out the blocks in the flyout.
* @param {!Array.<!Object>} contents The blocks and buttons to lay out.
* @param {!Array.<number>} gaps The visible gaps between blocks.
* @private
*/
Blockly.VerticalFlyout.prototype.layout_ = function(contents, gaps) {
var margin = this.MARGIN;
var flyoutWidth = this.getWidth() / this.workspace_.scale;
var cursorX = margin;
var cursorY = margin;
for (var i = 0, item; item = contents[i]; i++) {
if (item.type == 'block') {
var block = item.block;
var allBlocks = block.getDescendants();
for (var j = 0, child; child = allBlocks[j]; j++) {
// Mark blocks as being inside a flyout. This is used to detect and
// prevent the closure of the flyout if the user right-clicks on such a
// block.
child.isInFlyout = true;
}
var root = block.getSvgRoot();
var blockHW = block.getHeightWidth();
// Figure out where the block goes, taking into account its size, whether
// we're in RTL mode, and whether it has a checkbox.
var oldX = block.getRelativeToSurfaceXY().x;
var newX = flyoutWidth - this.MARGIN;
var moveX = this.RTL ? newX - oldX : margin;
if (block.hasCheckboxInFlyout()) {
this.createCheckbox_(block, cursorX, cursorY, blockHW);
if (this.RTL) {
moveX -= (this.CHECKBOX_SIZE + this.CHECKBOX_MARGIN);
} else {
moveX += this.CHECKBOX_SIZE + this.CHECKBOX_MARGIN;
}
}
// The block moves a bit extra for the hat, but the block's rectangle
// doesn't. That's because the hat actually extends up from 0.
block.moveBy(moveX,
cursorY + (block.startHat_ ? Blockly.BlockSvg.START_HAT_HEIGHT : 0));
var rect = this.createRect_(block, moveX, cursorY, blockHW, i);
this.addBlockListeners_(root, block, rect);
cursorY += blockHW.height + gaps[i];
} else if (item.type == 'button') {
var button = item.button;
var buttonSvg = button.createDom();
button.moveTo(cursorX, cursorY);
button.show();
Blockly.bindEvent_(buttonSvg, 'mouseup', button, button.onMouseUp);
this.buttons_.push(button);
cursorY += button.height + gaps[i];
}
}
};
/**
* Create and place a rectangle corresponding to the given block.
* @param {!Blockly.Block} block The block to associate the rect to.
* @param {number} x The x position of the cursor during this layout pass.
* @param {number} y The y position of the cursor during this layout pass.
* @param {!{height: number, width: number}} blockHW The height and width of the
* block.
* @param {number} index The index into the background buttons list where this
* rect should be placed.
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* @return {!SVGElement} Newly created SVG element for the rectangle behind the
* block.
* @private
*/
Blockly.VerticalFlyout.prototype.createRect_ = function(block, x, y,
blockHW, index) {
// Create an invisible rectangle under the block to act as a button. Just
// using the block as a button is poor, since blocks have holes in them.
var rect = Blockly.utils.createSvgElement('rect',
{
'fill-opacity': 0,
'x': x,
'y': y,
'height': blockHW.height,
'width': blockHW.width
}, null);
rect.tooltip = block;
Blockly.Tooltip.bindMouseEvents(rect);
// Add the rectangles under the blocks, so that the blocks' tooltips work.
this.workspace_.getCanvas().insertBefore(rect, block.getSvgRoot());
block.flyoutRect_ = rect;
this.backgroundButtons_[index] = rect;
return rect;
};
/**
* Create and place a checkbox corresponding to the given block.
* @param {!Blockly.Block} block The block to associate the checkbox to.
* @param {number} cursorX The x position of the cursor during this layout pass.
* @param {number} cursorY The y position of the cursor during this layout pass.
* @param {!{height: number, width: number}} blockHW The height and width of the
* block.
* @private
*/
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Blockly.VerticalFlyout.prototype.createCheckbox_ = function(block, cursorX,
cursorY, blockHW) {
var svgRoot = block.getSvgRoot();
var extraSpace = this.CHECKBOX_SIZE + this.CHECKBOX_MARGIN;
var checkboxRect = Blockly.utils.createSvgElement('rect',
{
'class': 'blocklyFlyoutCheckbox',
'height': this.CHECKBOX_SIZE,
'width': this.CHECKBOX_SIZE,
'x': this.RTL ? this.getWidth() / this.workspace_.scale - extraSpace :
cursorX,
'y': cursorY + blockHW.height / 2 -
this.CHECKBOX_SIZE / 2
}, null);
var checkboxObj = {svgRoot: checkboxRect, clicked: false, block: block};
block.flyoutCheckbox = checkboxObj;
this.workspace_.getCanvas().insertBefore(checkboxRect, svgRoot);
this.checkboxes_.push(checkboxObj);
};
/**
* Respond to a click on a checkbox in the flyout.
* @param {!Object} checkboxObj An object containing the svg element of the
* checkbox, a boolean for the state of the checkbox, and the block the
* checkbox is associated with.
* @return {!Function} Function to call when checkbox is clicked.
* @private
*/
Blockly.VerticalFlyout.prototype.checkboxClicked_ = function(checkboxObj) {
return function(e) {
checkboxObj.clicked = !checkboxObj.clicked;
if (checkboxObj.clicked) {
Blockly.addClass_((checkboxObj.svgRoot), 'checked');
} else {
Blockly.removeClass_((checkboxObj.svgRoot), 'checked');
}
// This event has been handled. No need to bubble up to the document.
e.stopPropagation();
e.preventDefault();
};
};
/**
* Explicitly set the clicked state of the checkbox for the given block.
* @param {string} blockId ID of block whose checkbox should be changed.
* @param {boolean} clicked True if the box should be marked clicked.
*/
Blockly.VerticalFlyout.prototype.setCheckboxState = function(blockId, clicked) {
var block = this.workspace_.getBlockById(blockId);
if (!block) {
throw 'No block found in the flyout for id ' + blockId;
}
var checkboxObj = block.flyoutCheckbox;
checkboxObj.clicked = clicked;
if (checkboxObj.clicked) {
Blockly.addClass_((checkboxObj.svgRoot), 'checked');
} else {
Blockly.removeClass_((checkboxObj.svgRoot), 'checked');
}
};
/**
* Handle a mouse-move to vertically drag the flyout.
* @param {!Event} e Mouse move event.
* @private
*/
Blockly.VerticalFlyout.prototype.onMouseMove_ = function(e) {
var metrics = this.getMetrics_();
if (metrics.contentHeight - metrics.viewHeight < 0) {
return;
}
var dy = e.clientY - this.startDragMouseY_;
this.startDragMouseY_ = e.clientY;
var y = metrics.viewTop - dy;
y = goog.math.clamp(y, 0, metrics.contentHeight - metrics.viewHeight);
this.scrollbar_.set(y);
};
/**
* Determine if a drag delta is toward the workspace, based on the position
* and orientation of the flyout. This is used in determineDragIntention_ to
* determine if a new block should be created or if the flyout should scroll.
* @param {number} dx X delta of the drag.
* @param {number} dy Y delta of the drag.
* @return {boolean} true if the drag is toward the workspace.
* @private
*/
Blockly.VerticalFlyout.prototype.isDragTowardWorkspace_ = function(dx, dy) {
// Direction goes from -180 to 180, with 0 toward the right and 90 on top.
var dragDirection = Math.atan2(dy, dx) / Math.PI * 180;
var draggingTowardWorkspace = false;
var range = this.dragAngleRange_;
if (this.toolboxPosition_ == Blockly.TOOLBOX_AT_LEFT) {
// Vertical at left.
if (dragDirection < range && dragDirection > -range) {
draggingTowardWorkspace = true;
}
} else {
// Vertical at right.
if (dragDirection < -180 + range || dragDirection > 180 - range) {
draggingTowardWorkspace = true;
}
}
return draggingTowardWorkspace;
};
/**
* Copy a block from the flyout to the workspace and position it correctly.
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* @param {!Blockly.Block} originBlock The flyout block to copy.
* @return {!Blockly.Block} The new block in the main workspace.
* @private
*/
Blockly.VerticalFlyout.prototype.placeNewBlock_ = function(originBlock) {
var targetWorkspace = this.targetWorkspace_;
var svgRootOld = originBlock.getSvgRoot();
if (!svgRootOld) {
throw 'originBlock is not rendered.';
}
// Figure out where the original block is on the screen, relative to the upper
// left corner of the main workspace.
// In what coordinates? Pixels?
var xyOld = Blockly.utils.getInjectionDivXY_(svgRootOld);
// Take into account that the flyout might have been scrolled horizontally
// (separately from the main workspace).
// Generally a no-op in vertical mode but likely to happen in horizontal
// mode.
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// var scrollX = this.workspace_.scrollX;
var scale = this.workspace_.scale;
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// xyOld.x += scrollX / scale - scrollX;
var targetMetrics = targetWorkspace.getMetrics();
// If the flyout is on the right side, (0, 0) in the flyout is offset to
// the right of (0, 0) in the main workspace. Add an offset to take that
// into account.
if (this.toolboxPosition_ == Blockly.TOOLBOX_AT_RIGHT) {
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scrollX = targetMetrics.viewWidth - this.width_;
// Scale the scroll (getSvgXY_ did not do this).
xyOld.x += scrollX / scale - scrollX;
}
// The main workspace has 0,0 at the top inside corner of the toolbox.
// Need to take that into account now that the flyout is offset from there in
// both directions.
if (this.parentToolbox_) {
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// TODO (fenichel): fix these offsets to correctly deal with scaling
// changes.
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xyOld.y += (this.parentToolbox_.getHeight()) /
targetWorkspace.scale -
(this.parentToolbox_.getHeight());
var xOffset = this.parentToolbox_.getWidth() / targetWorkspace.scale -
this.parentToolbox_.getWidth();
if (this.toolboxPosition_ == Blockly.TOOLBOX_AT_RIGHT) {
xyOld.x += xOffset;
} else {
xyOld.x -= xOffset;
}
}
// Take into account that the flyout might have been scrolled vertically
// (separately from the main workspace).
var scrollY = this.workspace_.scrollY;
xyOld.y += scrollY / scale - scrollY;
// Create the new block by cloning the block in the flyout (via XML).
var xml = Blockly.Xml.blockToDom(originBlock);
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// The target workspace would normally resize during domToBlock, which will
// lead to weird jumps. Save it for terminateDrag.
targetWorkspace.setResizesEnabled(false);
var block = Blockly.Xml.domToBlock(xml, targetWorkspace);
var svgRootNew = block.getSvgRoot();
if (!svgRootNew) {
throw 'block is not rendered.';
}
// Figure out where the new block got placed on the screen, relative to the
// upper left corner of the workspace. This may not be the same as the
// original block because the flyout's origin may not be the same as the
// main workspace's origin.
var xyNew = Blockly.utils.getInjectionDivXY_(svgRootNew);
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// Scale the scroll (getSvgXY_ did not do this).
xyNew.x +=
targetWorkspace.scrollX / targetWorkspace.scale - targetWorkspace.scrollX;
xyNew.y +=
targetWorkspace.scrollY / targetWorkspace.scale - targetWorkspace.scrollY;
// Move the new block to where the old block is.
var dx = ((scale * xyOld.x) - (targetWorkspace.scale * xyNew.x)) /
targetWorkspace.scale;
var dy = ((scale * xyOld.y) - (targetWorkspace.scale * xyNew.y)) /
targetWorkspace.scale;
block.moveBy(dx, dy);
return block;
};
/**
* Return the deletion rectangle for this flyout in viewport coordinates.
* @return {goog.math.Rect} Rectangle in which to delete.
*/
Blockly.VerticalFlyout.prototype.getClientRect = function() {
if (!this.svgGroup_) {
return null;
}
var flyoutRect = this.svgGroup_.getBoundingClientRect();
// BIG_NUM is offscreen padding so that blocks dragged beyond the shown flyout
// area are still deleted. Must be larger than the largest screen size,
// but be smaller than half Number.MAX_SAFE_INTEGER (not available on IE).
var BIG_NUM = 1000000000;
var x = flyoutRect.left;
var width = flyoutRect.width;
if (this.toolboxPosition_ == Blockly.TOOLBOX_AT_LEFT) {
return new goog.math.Rect(x - BIG_NUM, -BIG_NUM, BIG_NUM + width,
BIG_NUM * 2);
} else { // Right
return new goog.math.Rect(x, -BIG_NUM, BIG_NUM + width, BIG_NUM * 2);
}
};
/**
* Compute width of flyout. Position button under each block.
* For RTL: Lay out the blocks right-aligned.
* @param {!Array<!Blockly.Block>} blocks The blocks to reflow.
*/
Blockly.VerticalFlyout.prototype.reflowInternal_ = function(/* blocks */) {
// This is a no-op because the flyout is a fixed size.
return;
};