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1261 lines (927 loc) · 26 KB
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/*
* CSS Template Layout Module Implementation <http://code.google.com/p/css-template-layout/>
* Version: 1.1.6-bb (2010-08-09)
* Copyright: 2010, Alexis Deveria <http://a.deveria.com/>
* License: GNU General Public License, Free Software Foundation
* <http://creativecommons.org/licenses/GPL/2.0/>
*/
/*
Known bugs:
- Template widths are not used if total of row widths is smaller
- min/max-width/heights for elements is not supported
- template content should flow in first slot if not @ is found
Changelog
V1.01
* Replaced .css() notation for width and height with shorter notations
* Improved the way multiple elements per slot appear
V1.1
* Fixed margin/border/padding behavior
* Changed slot behavior to match spec text rather than examples
* Limited ::slot() values to allowed values
* Support for ::slot() vertical-align "middle" and "bottom" added
* Support for ::slot() overflow hidden/visible added
* Proper support far ::slot() background properties
* Support for template background in combination with slot backgrounds
V1.1.1
* Added support for comma-seperated selectors
* Fixed background positioning for body templates.
* Added support for setting template display/position properties using jQuery().css()
V1.1.2
* Added/fixed support for width/height set in CSS for elements in a slot
* Allow fallback class to be set, to hide fallback CSS rules
* Improved display property parsing, corrected handling of incorrect width values
* Added support for spaces between minmax() values
* Added $.templateLayoutShowOnReady to hide the non-template rendering.
* Added support for sub-templates with same letters
V1.1.3
* Fixed IE bugs
V1.1.4
* Made body appear visible on native support
* Fixed vertical positioning for multiple elements with margins
V1.1.5
* Fixed Bug where first given column width would be ignored
V1.1.6
* Fixed jQuery 1.4/IE8 bug
V1.1.6-bb
* Now using grid/flow properties instead of display/position
(By Bert Bos <bert@w3.org>, 20 March 2012)
*/
(function($) {
var css_data, prefix = '';
var templates;
var same_els = [];
var cur_tpl_sel;
var delay = 0;
var page_hidden = false;
var rules = [];
// Set Template grid/flow values using jQuery
var proxied = jQuery.fn.css;
jQuery.fn.css = function(key, value) {
var disp_prop = prefix + 'grid';
var pos_prop = prefix + 'flow';
var disp = false, pos = false;
if(value) {
if(key == disp_prop && value.indexOf('"') != -1) {
disp = true;
} else if(key == pos_prop && value.length == 1) {
pos = true;
} else {
return proxied.apply(this, arguments);
}
var jq_el = this;
//Change "grid" value
var cur_sel;
$.each(templates,function(sel,tpl) {
if(disp) {
if(jq_el.is(sel)) { cur_sel = sel; }
} else {
$.each(tpl.chars,function(chr,chr_data) {
if(jq_el.is(chr_data.selector)) {
cur_sel = chr_data.selector;
}
});
}
});
$.each(rules,function(i,rule) {
if(rule.selector == cur_sel) {
if(disp) {
rule.properties[disp_prop] = value;
} else if(pos) {
rule.properties[pos_prop] = value;
}
}
});
getTemplateData(rules);
setLayout();
} else {
return proxied.apply(this, arguments);
}
};
$.templateLayoutShowOnReady = function() {
document.write('<style> body {visibility:hidden} </style>');
page_hidden = true;
}
$.setTemplateLayout = function(given_data, given_pre) {
// Do nothing if native support is found
if(hasNativeSupport()) {
showPage();
return false;
}
// Redo layout on resize
setTimeout(function() {
$(window).resize(setLayout);
},100);
if(typeof given_data == 'string') {
given_data = {file:given_data};
}
if(given_pre) {
given_data.prefix = given_pre;
}
// Set prefix if given
if(given_data) {
if(given_data.prefix) {
prefix = '-' + given_data.prefix + '-';
}
if(given_data.delay) {
delay = given_data.delay;
}
if(given_data.fallback) {
$('.' + given_data.fallback).remove();
}
}
if(!given_data) {
setLayoutFromTag();
} else {
css_data = '';
if(given_data.text) {
css_data = given_data.text;
$('head').append('<style>' + css_data + '</style>');
}
if(given_data.file) {
$.get(given_data.file,function(str) {
css_data += str;
setLayout();
});
}
if(!given_data.file && !css_data) {
setLayoutFromTag();
return false;
}
if(css_data) setLayout();
}
};
$.redoTemplateLayout = setLayout;
function showPage() {
if(page_hidden) {
$('body').css('visibility','visible');
page_hidden = false;
}
}
function setLayoutFromTag() {
var st_el = $('style');
if(!st_el.length) return;
if(st_el.text()) {
css_data = st_el.text();
setLayout();
} else {
// Get raw HTML page as string and get CSS using regexp
$.get(document.location.href,function(html_page) {
var style_match = html_page.match(/<style.*?>([\s\S]*?)<\/style>/);
css_data = style_match?style_match[1]:'';
setLayout();
});
}
}
// Returns the CSS data as an array with objects
function getCSSRules() {
// Remove commented out stuff
css_data = css_data.replace(/\/\*[\s\S]*?\*\//g,'');
var bits = css_data.split('}');
$.each(bits,function() {
var rule = $.trim(this);
if(!rule) return;
var rule_data = parseRule(rule);
if(!rule_data) return;
if(rule_data.selector.indexOf(',') != -1) {
// Multiple selectors
var selectors = rule_data.selector.split(',');
$.each(selectors, function(i,sel) {
rules.push({
'selector': $.trim(sel),
'properties': rule_data.properties
});
});
} else {
// One selector
rules.push(rule_data);
}
});
return rules;
}
// Returns CSS selectors and properties
function parseRule(rule) {
if(rule.indexOf('*') === 0 || rule.indexOf('{') == -1) {
return false;
}
var rule_parts = rule.split('{');
var sel = $.trim(rule_parts[0]);
var prop_text = rule_parts[1].split(';');
var props = {};
$.each(prop_text,function() {
var prop_parts = this.split(':');
var name = $.trim(prop_parts[0]).toLowerCase(); // lowercase for IE
var value = $.trim(prop_parts[1]);
props[name] = value;
});
return {
'selector':sel,
'properties':props
};
}
function getTemplateDisplay(display_val) {
// Remove newlines
var str = display_val.replace(/\n|\r/g,' ');
var d_parts = str.split('"');
var rows = [];
var widths = [];
var unique_chars = {};
// Loop through even numbers
for(var i = 2, l = d_parts.length; i < l; i+=2) {
var part = d_parts[i];
var height = 'auto';
if(part.indexOf('/') != -1) {
// Has a row height
var val_parts = part.match(/\/\s*(\S+)(.*)/);
height = $.trim(val_parts[1]);
}
if($.trim(part) && i == l-1) {
var last = $.trim(d_parts[l-1]).replace(/^\/\s*\S+\s*/,'');
if(last && last.indexOf('/') == -1) {
if(last.indexOf('(') != -1) {
// Deal with minmax pars
var pars = last.match(/minmax(\(.*?\))/g);
$.each(pars,function(i,p_set) {
var clean_p = p_set.replace(/\s*/g,'');
last = last.replace(p_set,clean_p);
});
}
last = last.replace(/\(\)/,'');
widths = last.split(/\s+/);
}
}
var chars = d_parts[i-1].replace(/[^a-z*\.]/gi,'');
chars = $.trim(chars).split('');
// Get unique characters
$.each(chars,function() {
unique_chars[this] = true;
});
// Do not allow negative row heights
if(height.indexOf('-') == 0) {
return false;
}
rows.push({
'chars':chars,
'height':height
});
}
var col_width = rows[0].chars.length;
// too many widths, cut last off
while(widths.length > col_width) {
widths.pop();
}
// too few, add '*'
while(widths.length < col_width) {
widths.push('*');
}
return {
'rows':rows,
'widths':widths,
'chars':unique_chars
}
}
function getTemplateData(rules) {
var tpl_positions = {};
var pseudo_props = {};
var tpl_num = 0;
var tmp_templates = [];
$.each(rules,function(r,rule) {
var props = rule.properties;
var selector = rule.selector;
var disp_prop = prefix + 'grid';
var pos_prop = prefix + 'flow';
var slotEl = false;
//Look for ::slot() pseudo-class
if(selector.indexOf('::slot(') != -1) {
var matches = selector.match(/slot\((.)\)/);
if(matches && matches.length > 1) {
var p_char = matches[1];
var selector_start = selector.split('::slot')[0];
var allowed_props = {};
$.each(props,function(name,val) {
if(name.indexOf('background') == 0
|| name.indexOf('overflow') != -1
|| name.indexOf('vertical-align') != -1) {
allowed_props[name] = val;
}
});
pseudo_props[selector_start + '|' + p_char] = allowed_props;
}
}
//Look for Layout "flow" property
if(props[pos_prop] && props[pos_prop].length == 1) {
var chr = props[pos_prop];
tpl_positions[selector] = {
'chr':chr,
'props':props
}
slotEl = true;
} else if(props[pos_prop] == 'same') {
same_els.push(selector);
}
//Look for Layout "grid" property
if(props[disp_prop] && props[disp_prop].indexOf('"') != -1) {
var tpl_display = getTemplateDisplay(props[disp_prop]);
if(!tpl_display) return;
// Store template data
tmp_templates.push({
'sel':selector,
'rows':tpl_display.rows,
'widths':tpl_display.widths,
'chars':tpl_display.chars,
'properties':props,
'pseudo_props':{},
'num':tpl_num,
'slotEl':slotEl
});
tpl_num++;
}
});
// Re-order to process parent templates first
tmp_templates.sort(function(a,b) { return !b.slotEl; });
$.each(tmp_templates,function(i,tpl) {
templates[tpl.sel] = tpl;
});
$.each(tpl_positions,function(p_sel,pos) {
var min_distance = false;
var cur_sel = false;
$.each(templates,function(t_sel,tpl) {
// Check if template includes this character and has it as a child
if(t_sel == p_sel) {
tpl_positions[t_sel].tplEl = true;
}
if(!tpl.chars[pos.chr]) return;
var parents = $(p_sel).parents();
if(parents.is(t_sel)) {
// Calculate closeness
var distance;
var i = 0;
parents.each(function() {
if(parents[i] == $(t_sel)[0]) {
distance = i;
}
i++;
});
// Get first template or nearest one
if(min_distance === false || distance < min_distance) {
min_distance = distance;
cur_sel = t_sel;
}
}
});
var tplEl = pos.tplEl || false;
if(cur_sel) {
var pseudo_id = cur_sel + '|' + pos.chr;
var p_props = pseudo_props[pseudo_id] || false;
templates[cur_sel].chars[pos.chr] = {
'selector':p_sel,
'props':pos.props,
'pseudo_props':p_props,
'tplEl':tplEl,
'cur_sel':cur_sel
};
}
});
}
// Check if browser has native support for template layout
function hasNativeSupport() {
// var test_val = '"*"';
// var test_el = $('<p></p>');
// var supported = true;
// try {
// test_el.get(0).style.grid = test_val;
// } catch(err) {
// supported = false;
// }
// supported = (test_el.css('grid') == test_val);
// test_el.remove();
// return supported;
return false;
}
// Template Constructor
function Template(tpl,tpl_sel) {
var given_widths = tpl.widths;
var rows = tpl.rows;
var tpl_props = tpl.properties;
var widths = [], heights = [];
var tpl_el = $(tpl_sel);
var slots = tpl.chars;
$.each(slots,function(chr,slot) {
if(slot !== true) {
slot.slot_w = 1;
slot.slot_h = 1;
}
});
tpl.margins = 0;
// Get the width of a 'min/max-content' column
function getContentWidth(col_num, type) {
var cell_widths = [];
$.each(slots,function(chr,slot) {
var width = slot.props.width || 'auto';
if(slot.col == col_num && slot.slot_w == 1) {
//Get content width from this element
var cur_w = getDivDims({
'width':width,
'top':'auto',
'left':'auto'
},slot.el.clone()).w;
cell_widths.push(cur_w);
}
});
var calc = type.split('-')[0];
// Get min-content or max-content value
return Math[calc].apply({}, cell_widths);
}
// Get width and height based on given style/content
function getDivDims(given_css, content) {
var testDiv = $('<div><\/div>');
testDiv.css({
'visibility':'hidden',
'margin':0,
'padding':0,
'position':'absolute'
});
if(content) {
testDiv.append(content);
}
if(given_css) {
testDiv.css(given_css);
}
tpl_el.append(testDiv);
var info = {
w:testDiv.width(),
h:testDiv.height()
}
testDiv.remove();
return info;
}
// Get width or height of an element in pixels
function getPixelData(type,size,col_num) {
var width = 'auto', height = 'auto';
if(type == 'h') {
height = size;
} else {
width = size;
if(width == 'min-content' || width == 'max-content') {
return getContentWidth(col_num, width);
}
}
var dims = getDivDims({
'height':height,
'width':width
});
return dims[type];
}
function getHeight(slot) {
var total_h = 0;
for(var i = slot.row; i < slot.slot_h+slot.row && i < heights.length;i++) {
total_h += heights[i];
}
//Change based on negative top margin
var t_margin = parseInt(slot.el.css('margin-top'));
if(t_margin < 0) {
total_h -= t_margin;
}
return total_h;
}
function getElSize(type,chr,cur_size) {
var css_val = slots[chr].props[type]+'';
va
107FA
r new_size = css_val;
if(css_val.indexOf('%') != -1 && type == 'width') {
new_size = cur_size * parseInt(css_val)/100;
}
return new_size;
}
// Get the pixel width of a given slot
function getWidth(slot) {
var total_w = 0;
for(var i = slot.col; i < slot.slot_w+slot.col;i++) {
total_w += widths[i];
}
//Change based on margin
var cur_border = slot.el.outerWidth(true) - slot.el.width();
if(cur_border) {
total_w -= cur_border;
}
if(slot.tplEl) {
// Give width/height to sub-template if given
if(rows[slot.row].height && rows[slot.row].height != '*') {
templates[slot.selector].properties.height = rows[slot.row].height;
}
templates[slot.selector].properties.width = total_w;
var newTpl = new Template(templates[slot.selector], slot.selector);
var sub_tpl = newTpl.make();
slot.genHeight = sub_tpl.height;
return sub_tpl.width;
}
return total_w;
}
// Get total height of multiple elements
function getMultiHeight(el) {
var btop = el.css('border-top-width');
var clone = el.clone();
clone.each(function() {
$(this).css('position','static');
});
return getDivDims(0,clone).h;
}
// Calculate row heights
function calcRowHeights() {
// if(tpl.slotEl && slots['*']) {
if(tpl.slotEl) {
// Is template as well as slot, get height if exists
tpl_props.height = tpl_el.height();
}
//Set template height to 100% or the given height
if(tpl_props.height) {
tpl_el.height(tpl_props.height);
var tot_height = tpl_el.height();
} else {
var tpl_height = 0;
}
var flex_rows = 0;
var min_heights = [];
$.each(rows,function(row_num,row) {
var max_h = 0;
$.each(slots,function(chr,slot) {
if(slot.row == row_num) { // && slot.slot_h == 1
if(slot.props.height) {
slot.el.height(slot.props.height);
} else {
slot.el.height('auto');
}
if(!min_heights[row_num]) {
min_heights[row_num] = 0;
}
var cur_h;
// If slot is a template, get its generated height
if(slot.genHeight) {
cur_h = slot.genHeight;
} else if(slot.slot_h == 1) {
cur_h = getMultiHeight(slot.el);
} else {
var part_h = getMultiHeight(slot.el)/slot.slot_h;
for(var i = row_num; i<slot.slot_h; i++) {
min_heights[i] = part_h;
}
}
if(max_h < min_heights[row_num]) {
max_h = min_heights[row_num];
}
if(max_h < cur_h) {
max_h = cur_h;
}
}
});
if(tpl_props.height && tpl_props.height != 'auto') {
// Any "auto" / * rows should be distributed
flex_rows++;
max_h = 0;
} else if(row.height != '*' && row.height != 'auto') {
max_h = getPixelData('h',row.height);
}
heights[row_num] = max_h;
tpl_height += max_h;
});
if(flex_rows) {
var flex_height = tot_height/flex_rows;
$.each(rows,function(row_num,row) {
if(row.height == '*' || row.height == 'auto') {
heights[row_num] = flex_height;
}
});
} else {
tpl_el.height(tpl_height);
}
}
function calcColWidths() {
var px_width = 0;
var flex_cols = 0;
if(tpl.slotEl) {
tpl_el.width(tpl_el.width());
}
//Set template width to 100% or the given width
tpl_el.width(tpl_props.width || '100%');
var tot_width = tpl_el.width();
widths = [];
var new_tot = 0;
$.each(given_widths,function(i,w) {
if(w == 'fit-content') {
w = given_widths[i] = 'minmax(min-content,max-content)';
}
if(w == '*' || w == 'auto') {
flex_cols++;
px_width = 0;
} else if(w.indexOf('minmax') === 0) {
//Calc min/max
var minmax = w.match(/\((.*?),(.*?)\)/);
var min = minmax[1];
var max = minmax[2];
px_width = getPixelData('w',max,i);
tot_width -= px_width;
} else {
px_width = getPixelData('w',w,i);
tot_width -= px_width;
}
widths.push(px_width);
new_tot += px_width;
});
if(tot_width < 0) {
$.each(given_widths,function(i,w) {
if(w.indexOf('minmax') != -1) {
var minmax = w.match(/\((.*?),(.*?)\)/);
var min = minmax[1];
var max = minmax[2];
min_pixels = getPixelData('w',min,i);
widths[i] += tot_width;
tot_width = 0;
if(widths[i] < min_pixels) {
widths[i] = min_pixels;
}
}
});
}
var flex_width = tot_width/flex_cols;
$.each(given_widths,function(i,w) {
if(w == '*' || w == 'auto') {
widths[i] = flex_width;
}
});
}
function getTop(slot, offset) {
var total_h = offset || 0;
var row_num = slot.row;
if(slots['*'] && !slot.isHolder) {
total_h = -1*getPixelData('h',tpl_el.css('top'));
}
$.each(heights,function(i) {
if(i < row_num) {
total_h += this;
}
});
return total_h;
}
function getLeft(slot) {
var col_num = slot.col;
var total_w = 0;
if(slots['*'] && !slot.isHolder) {
total_w = -1*getPixelData('w',tpl_el.css('left'));
}
$.each(widths,function(i) {
if(i < col_num) {
total_w += this;
}
});
return total_w;
}
function setSames(slot) {
// Loop through "same" elements
$.each(same_els,function(a,el_sel) {
var same_el = $(el_sel);
// Loop through "same" element collection
same_el.each(function() {
var cur_el = $(this);
var new_group = false;
// Make a new element collection including "same" elements if it's the same as the slot element
slot.el.each(function() {
var cslot_el = $(this);
if(!new_group) {
new_group = cslot_el;
} else {
new_group[new_group.length++] = cslot_el[0];
}
if(cslot_el.next()[0] == cur_el[0]) {
new_group[new_group.length++] = cur_el[0];
}
});
if(new_group.length > 1) {
slot.el = new_group;
slot.multi = true;
}
});
});
}
function setBackground() {
var set_bg = false;
var bg_props = {};
if(tpl_el.is('body')) {
return;
}
$.each(tpl_props,function(name,val) {
if(name.indexOf('background') === 0) {
set_bg = true;
bg_props[name] = val;
}
});
if(!set_bg) return;
var id = 'jq_tpl_bg-' + tpl.num;
var off = tpl_el.offset();
var tpl_bg = $('#'+id);
if(!tpl_bg.length) {
tpl_bg = $('<div id="'+id+'"></div>');
tpl_bg.css(bg_props);
}
tpl_bg.css({
'z-index': -2,
position: 'absolute',
top: off.top,
left: off.left,
width: tpl_el.width(),
height: tpl_el.height()
});
$('body').append(tpl_bg);
}
function makePseudoSlot(chr,slot) {
// Set pseudo-slot properties if found
if(slot.pseudo_props) {
var doc_offset = slot.el.offset();
var id = 'jq_tpl' + tpl.num + '_slot-' + chr;
var p_slot = $('#'+id);
var p_props = slot.pseudo_props;