Print Preview: Adding "Minimum" option in margins dropdown.

BUG=101456
TEST=Select Minimum in the margins dropdown.

Review URL: http://codereview.chromium.org/8392012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107803 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/generated_resources.grd

@@ -6408,6 +6408,9 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_PRINT_PREVIEW_CUSTOM_MARGINS" desc="Option that specifies the page be printed with user-specified custom margins.">
         Custom
       </message>
+      <message name="IDS_PRINT_PREVIEW_MINIMUM_MARGINS" desc="Option that specifies the page be printed with the minimum allowed margins by the printer.">
+        Minimum
+      </message>
       <message name="IDS_PRINT_PREVIEW_TOP_MARGIN_LABEL" desc="ARIA label used by screen reader to explain the purpose of the top margin textbox.">
         Top margin
       </message>

chrome/browser/resources/print_preview/margin_settings.html

@@ -4,6 +4,7 @@
     <select id="margin-list">
       <option i18n-content="defaultMargins" value="0" selected></option>
       <option i18n-content="noMargins" value="1"></option>
+      <option i18n-content="minimumMargins" value="3"></option>
       <option i18n-content="customMargins" value="2"></option>
     </select>
   </div>

chrome/browser/resources/print_preview/margin_settings.js

@@ -155,6 +155,7 @@ cr.define('print_preview', function() {
   MarginSettings.MARGINS_VALUE_DEFAULT = 0;
   MarginSettings.MARGINS_VALUE_NO_MARGINS = 1;
   MarginSettings.MARGINS_VALUE_CUSTOM = 2;
+  MarginSettings.MARGINS_VALUE_MINIMUM = 3;
   // Default Margins option index.
   MarginSettings.DEFAULT_MARGINS_OPTION_INDEX = 0;
   // Group name corresponding to the top margin.
@@ -246,6 +247,13 @@ cr.define('print_preview', function() {
       return this.selectedMarginsValue == MarginSettings.MARGINS_VALUE_CUSTOM;
     },
 
+    /**
+     * @return {boolean} True if minimum margins are selected.
+     */
+    isMinimumMarginsSelected: function() {
+      return this.selectedMarginsValue == MarginSettings.MARGINS_VALUE_MINIMUM;
+    },
+
     /**
      * If the custom margin values have changed then request a new preview based
      * on the newly set margins.
@@ -491,10 +499,9 @@ cr.define('print_preview', function() {
      * @private
      */
     onMarginsChanged_: function() {
-      if (this.isDefaultMarginsSelected())
-        this.onDefaultMarginsSelected_();
-      else if (this.isNoMarginsSelected())
-        this.onNoMarginsSelected_();
+      if (this.isDefaultMarginsSelected() || this.isMinimumMarginsSelected() ||
+          this.isNoMarginsSelected())
+        this.onDefaultMinimumNoMarginsSelected_();
       else if (this.isCustomMarginsSelected())
         this.onCustomMarginsSelected_();
 
@@ -502,26 +509,15 @@ cr.define('print_preview', function() {
     },
 
     /**
-     * Executes when the default margins option is selected.
+     * Executes when the default or minimum or no margins option is selected.
      * @private
      */
-    onDefaultMarginsSelected_: function() {
+    onDefaultMinimumNoMarginsSelected_: function() {
       this.removeCustomMarginEventListeners_();
       this.forceDisplayingMarginLines_ = true;
       setDefaultValuesAndRegeneratePreview(false);
     },
 
-    /**
-     * Executes when the no margins option is selected.
-     * @private
-     */
-    onNoMarginsSelected_: function() {
-      this.removeCustomMarginEventListeners_();
-      this.forceDisplayingMarginLines_ = true;
-      this.customMargins_ = new Margins(0, 0, 0, 0);
-      setDefaultValuesAndRegeneratePreview(false);
-    },
-
     /**
      * Executes when the custom margins option is selected.
      * @private
@@ -529,10 +525,8 @@ cr.define('print_preview', function() {
     onCustomMarginsSelected_: function() {
       this.addCustomMarginEventListeners_();
 
-      if (this.lastSelectedOption_ == MarginSettings.MARGINS_VALUE_DEFAULT) {
-        this.customMargins_ = this.currentDefaultPageLayout.margins_;
-        this.customMargins_.roundToLocaleUnits();
-      }
+      this.customMargins_ = this.currentDefaultPageLayout.margins_;
+      this.customMargins_.roundToLocaleUnits();
       this.previousCustomMargins_.copy(this.customMargins_);
 
       if (this.previousDefaultPageLayout_ != this.currentDefaultPageLayout) {

chrome/browser/ui/webui/print_preview_data_source.cc

@@ -123,6 +123,7 @@ PrintPreviewDataSource::PrintPreviewDataSource()
   AddLocalizedString("defaultMargins", IDS_PRINT_PREVIEW_DEFAULT_MARGINS);
   AddLocalizedString("noMargins", IDS_PRINT_PREVIEW_NO_MARGINS);
   AddLocalizedString("customMargins", IDS_PRINT_PREVIEW_CUSTOM_MARGINS);
+  AddLocalizedString("minimumMargins", IDS_PRINT_PREVIEW_MINIMUM_MARGINS);
   AddLocalizedString("top", IDS_PRINT_PREVIEW_TOP_MARGIN_LABEL);
   AddLocalizedString("bottom", IDS_PRINT_PREVIEW_BOTTOM_MARGIN_LABEL);
   AddLocalizedString("left", IDS_PRINT_PREVIEW_LEFT_MARGIN_LABEL);