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# encoding: utf-8
require File.join(File.expand_path(File.dirname(__FILE__)), "spec_helper")
describe "A bounding box" do
before(:each) do
@x = 100
@y = 125
@width = 50
@height = 75
@box = Prawn::Document::BoundingBox.new(nil, nil, [@x,@y],
:width => @width, :height => @height )
end
it "should have an anchor at (x, y - height)" do
@box.anchor.should == [@x,@y-@height]
end
it "should have a left boundary of 0" do
@box.left.should == 0
end
it "should have a right boundary equal to the width" do
@box.right.should == @width
end
it "should have a top boundary of height" do
@box.top.should == @height
end
it "should have a bottom boundary of 0" do
@box.bottom.should == 0
end
it "should have a top-left of [0,height]" do
@box.top_left.should == [0,@height]
end
it "should have a top-right of [width,height]" do
@box.top_right.should == [@width,@height]
end
it "should have a bottom-left of [0,0]" do
@box.bottom_left.should == [0,0]
end
it "should have a bottom-right of [width,0]" do
@box.bottom_right.should == [@width,0]
end
it "should have an absolute left boundary of x" do
@box.absolute_left.should == @x
end
it "should have an absolute right boundary of x + width" do
@box.absolute_right.should == @x + @width
end
it "should have an absolute top boundary of y" do
@box.absolute_top.should == @y
end
it "should have an absolute bottom boundary of y - height" do
@box.absolute_bottom.should == @y - @height
end
it "should have an absolute bottom-left of [x,y-height]" do
@box.absolute_bottom_left.should == [@x, @y - @height]
end
it "should have an absolute bottom-right of [x+width,y-height]" do
@box.absolute_bottom_right.should == [@x + @width , @y - @height]
end
it "should have an absolute top-left of [x,y]" do
@box.absolute_top_left.should == [@x, @y]
end
it "should have an absolute top-right of [x+width,y]" do
@box.absolute_top_right.should == [@x + @width, @y]
end
it "should require width to be set" do
lambda do
Prawn::Document::BoundingBox.new(nil, nil, [100,100])
end.should.raise(ArgumentError)
end
it "should raise an ArgumentError if a block is not passed" do
pdf = Prawn::Document.new
lambda do
pdf.bounding_box([0, 0], :width => 200)
end.should.raise(ArgumentError)
end
end
describe "drawing bounding boxes" do
before(:each) { create_pdf }
it "should not stomp on the arguments to bounding_box" do
pdf = Prawn::Document.new
x = [100, 500]
pdf.bounding_box x, :width => 100 do
pdf.text "bork-bork-bork"
end
x.should == [100, 500]
end
it "should restore the margin box when bounding box exits" do
margin_box = @pdf.bounds
@pdf.bounding_box [100,500], :width => 100 do
#nothing
end
@pdf.bounds.should == margin_box
end
it "should restore the parent bounding box when calls are nested" do
@pdf.bounding_box [100,500], :width => 300, :height => 300 do
@pdf.bounds.absolute_top.should == 500 + @pdf.margin_box.absolute_bottom
@pdf.bounds.absolute_left.should == 100 + @pdf.margin_box.absolute_left
parent_box = @pdf.bounds
@pdf.bounding_box [50,200], :width => 100, :height => 100 do
@pdf.bounds.absolute_top.should == 200 + parent_box.absolute_bottom
@pdf.bounds.absolute_left.should == 50 + parent_box.absolute_left
end
@pdf.bounds.absolute_top.should == 500 + @pdf.margin_box.absolute_bottom
@pdf.bounds.absolute_left.should == 100 + @pdf.margin_box.absolute_left
end
end
it "should calculate a height if none is specified" do
@pdf.bounding_box([100, 500], :width => 100) do
@pdf.text "The rain in Spain falls mainly on the plains."
end
@pdf.y.should.be.close 458.384, 0.001
end
it "should keep track of the max height the box was stretched to" do
box = @pdf.bounding_box(@pdf.bounds.top_left, :width => 100) do
@pdf.move_down 100
@pdf.move_up 15
end
box.height.should == 100
end
it "should advance the y-position by bbox.height by default" do
orig_y = @pdf.y
@pdf.bounding_box [0, @pdf.cursor], :width => @pdf.bounds.width,
:height => 30 do
@pdf.text "hello"
end
@pdf.y.should.be.close(orig_y - 30, 0.001)
end
it "should not advance y-position if passed :hold_position => true" do
orig_y = @pdf.y
@pdf.bounding_box [0, @pdf.cursor], :width => @pdf.bounds.width,
:hold_position => true do
@pdf.text "hello"
end
# y only advances by height of one line ("hello")
@pdf.y.should.be.close(orig_y - @pdf.height_of("hello"), 0.001)
end
it "should not advance y-position of a stretchy bbox if it would stretch " +
"the bbox further" do
bottom = @pdf.y = @pdf.margin_box.absolute_bottom
@pdf.bounding_box [0, @pdf.margin_box.top], :width => @pdf.bounds.width do
@pdf.y = bottom
@pdf.text "hello" # starts a new page
end
@pdf.page_count.should == 2
# Restoring the position (to the absolute bottom) would stretch the bbox to
# the bottom of the page, which we don't want. This should be equivalent to
# a bbox with :hold_position => true, where we only advance by the amount
# that was actually drawn.
@pdf.y.should.be.close(
@pdf.margin_box.absolute_top - @pdf.height_of("hello"),
0.001
)
end
end
describe "Indentation" do
before(:each) { create_pdf }
it "should temporarily shift the x coordinate and width" do
@pdf.bounding_box([100,100], :width => 200) do
@pdf.indent(20) do
@pdf.bounds.absolute_left.should == 120
@pdf.bounds.width.should == 180
end
end
end
it "should restore the x coordinate and width after block exits" do
@pdf.bounding_box([100,100], :width => 200) do
@pdf.indent(20) do
# no-op
end
@pdf.bounds.absolute_left.should == 100
@pdf.bounds.width.should == 200
end
end
it "should restore the x coordinate and width on error" do
@pdf.bounding_box([100,100], :width => 200) do
begin
@pdf.indent(20) { raise }
rescue
@pdf.bounds.absolute_left.should == 100
@pdf.bounds.width.should == 200
end
end
end
it "should maintain left indentation across a page break" do
original_left = @pdf.bounds.absolute_left
@pdf.indent(20) do
@pdf.bounds.absolute_left.should == original_left + 20
@pdf.start_new_page
@pdf.bounds.absolute_left.should == original_left + 20
end
@pdf.bounds.absolute_left.should == original_left
end
it "should maintain right indentation across a page break" do
original_width = @pdf.bounds.width
@pdf.indent(0, 20) do
@pdf.bounds.width.should == original_width - 20
@pdf.start_new_page
@pdf.bounds.width.should == original_width - 20
end
@pdf.bounds.width.should == original_width
end
it "optionally allows adjustment of the right bound as well" do
@pdf.bounding_box([100,100], :width => 200) do
@pdf.indent(20, 30) do
@pdf.bounds.absolute_left.should == 120
@pdf.bounds.width.should == 150
end
@pdf.bounds.absolute_left.should == 100
@pdf.bounds.width.should == 200
end
end
describe "in a ColumnBox" do
it "should subtract the given indentation from the available width" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width,
:height => 200, :columns => 2, :spacer => 20) do
width = @pdf.bounds.width
@pdf.indent(20) do
@pdf.bounds.width.should.be.close(width - 20, 0.01)
end
end
end
it "should subtract right padding from the available width" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width,
:height => 200, :columns => 2, :spacer => 20) do
width = @pdf.bounds.width
@pdf.indent(20, 30) do
@pdf.bounds.width.should.be.close(width - 50, 0.01)
end
end
end
it "should maintain the same left indentation across column breaks" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width, :columns => 3, :spacer => 15) do
3.times do |column|
x = @pdf.bounds.left_side
@pdf.indent(20) do
@pdf.bounds.left_side.should == x+20
end
@pdf.bounds.move_past_bottom
end
end
end
it "should not change the right margin if only left indentation is requested" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width, :columns => 3, :spacer => 15) do
3.times do |column|
x = @pdf.bounds.right_side
@pdf.indent(20) do
@pdf.bounds.right_side.should == x
end
@pdf.bounds.move_past_bottom
end
end
end
it "should maintain the same right indentation across columns" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width, :columns => 3, :spacer => 15) do
3.times do |column|
x = @pdf.bounds.right_side
@pdf.indent(20, 10) do
@pdf.bounds.right_side.should == x-10
end
@pdf.bounds.move_past_bottom
end
end
end
it "should keep the right indentation after nesting indents" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width, :columns => 3, :spacer => 15) do
3.times do |column|
# I am giving a right indent of 10...
@pdf.indent(20, 10) do
x = @pdf.bounds.right_side
# ...and no right indent here...
@pdf.indent(20) do
# right indent is inherited from the parent!
@pdf.bounds.right_side.should == x
end
end
@pdf.bounds.move_past_bottom
end
end
end
it "should revert the right indentation if negative indent is given in nested indent" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width, :columns => 3, :spacer => 15) do
3.times do |column|
x = @pdf.bounds.right_side
@pdf.indent(20, 10) do
# requesting a negative right-indent of equivalent size...
@pdf.indent(20, -10) do
# ...resets the right margin to that of the column!
@pdf.bounds.right_side.should == x
end
end
@pdf.bounds.move_past_bottom
end
end
end
it "should reduce the available column width by the sum of all nested indents" do
@pdf.column_box([0, @pdf.cursor], :width => @pdf.bounds.width, :columns => 3, :spacer => 15) do
3.times do |column|
w = @pdf.bounds.width
@pdf.indent(20, 10) do
@pdf.indent(20, 10) do
@pdf.bounds.width.should == w - 60
end
end
@pdf.bounds.move_past_bottom
end
end
end
end
end
describe "A canvas" do
before(:each) { create_pdf }
it "should use whatever the last set y position is" do
@pdf.canvas do
@pdf.bounding_box([100,500],:width => 200) { @pdf.move_down 50 }
end
@pdf.y.should == 450
end
end
describe "Deep-copying" do
it "should create a new object that does not copy @document" do
Prawn::Document.new do
orig = bounds
copy = orig.deep_copy
copy.should.not == bounds
copy.document.should.be.nil
end
end
it "should deep-copy parent bounds" do
Prawn::Document.new do |pdf|
outside = pdf.bounds
pdf.bounding_box [100, 100], :width => 100 do
copy = pdf.bounds.deep_copy
# the parent bounds should have the same parameters
copy.parent.width.should == outside.width
copy.parent.height.should == outside.height
# but should not be the same object
copy.parent.should.not == outside
end
end
end
end
describe "Prawn::Document#reference_bounds" do
before(:each) { create_pdf }
it "should return self for non-stretchy bounds" do
@pdf.bounding_box([0, @pdf.cursor], :width => 100, :height => 100) do
@pdf.reference_bounds.should == @pdf.bounds
end
end
it "should return the parent bounds if in a stretchy box" do
@pdf.bounding_box([0, @pdf.cursor], :width => 100, :height => 100) do
correct_bounds = @pdf.bounds
@pdf.bounding_box([0, @pdf.cursor], :width => 100) do
@pdf.reference_bounds.should == correct_bounds
end
end
end
it "should find the non-stretchy box through 2 levels" do
@pdf.bounding_box([0, @pdf.cursor], :width => 100, :height => 100) do
correct_bounds = @pdf.bounds
@pdf.bounding_box([0, @pdf.cursor], :width => 100) do
@pdf.bounding_box([0, @pdf.cursor], :width => 100) do
@pdf.reference_bounds.should == correct_bounds
end
end
end
end
it "should return the margin box if there's no explicit bbox" do
@pdf.reference_bounds.should == @pdf.margin_box
@pdf.bounding_box([0, @pdf.cursor], :width => 100) do
@pdf.reference_bounds.should == @pdf.margin_box
end
end
it "should return the canvas box if we're in a canvas" do
@pdf.canvas do
canvas_box = @pdf.bounds
@pdf.reference_bounds.should == canvas_box
@pdf.bounding_box([0, @pdf.cursor], :width => 100) do
@pdf.reference_bounds.should == canvas_box
end
end
end
end
describe "BoundingBox#move_past_bottom" do
before(:each) { create_pdf }
it "should ordinarily start a new page" do
@pdf.bounds.move_past_bottom
@pdf.text "Foo"
pages = PDF::Inspector::Page.analyze(@pdf.render).pages
pages.size.should == 2
pages[0][:strings].should == []
pages[1][:strings].should == ["Foo"]
end
it "should move to the top of the next page if it exists already" do
# save away the y-position at the top of a page
top_y = @pdf.y
# create a blank page but go to the page before it
@pdf.start_new_page
@pdf.go_to_page 1
@pdf.text "Foo"
@pdf.bounds.move_past_bottom
@pdf.y.should.be.close(top_y, 0.001) # we should be at the top
@pdf.text "Bar"
pages = PDF::Inspector::Page.analyze(@pdf.render).pages
pages.size.should == 2
pages[0][:strings].should == ["Foo"]
pages[1][:strings].should == ["Bar"]
end
end
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