From 02c492db8a46d7b9829b3a1afcc7d0fdd76c222d Mon Sep 17 00:00:00 2001
From: Shane Carr <shane@unicode.org>
Date: Sat, 14 Apr 2018 09:49:12 +0000
Subject: [PATCH] ICU-13700 Adding DecimalFormat "scale" getter/setter and
 implementation in the new number formatting pipeline.

X-SVN-Rev: 41232
---
 icu4c/source/i18n/decimfmt.cpp             | 18 ++++++++++++++++--
 icu4c/source/i18n/number_decimfmtprops.cpp |  2 ++
 icu4c/source/i18n/number_decimfmtprops.h   |  1 +
 icu4c/source/i18n/unicode/decimfmt.h       | 22 ++++++++++++++++++++++
 4 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/icu4c/source/i18n/decimfmt.cpp b/icu4c/source/i18n/decimfmt.cpp
index 8ca75eb10a9..f95b8112310 100644
--- a/icu4c/source/i18n/decimfmt.cpp
+++ b/icu4c/source/i18n/decimfmt.cpp
@@ -166,6 +166,10 @@ DecimalFormat::setAttribute(UNumberFormatAttribute attr, int32_t newValue, UErro
             setMultiplier(newValue);
             break;
 
+        case UNUM_SCALE:
+            setScale(newValue);
+            break;
+
         case UNUM_GROUPING_SIZE:
             setGroupingSize(newValue);
             break;
@@ -221,7 +225,6 @@ DecimalFormat::setAttribute(UNumberFormatAttribute attr, int32_t newValue, UErro
             status = U_UNSUPPORTED_ERROR;
             break;
     }
-    // TODO: UNUM_SCALE?
     // TODO: UNUM_FORMAT_FAIL_IF_MORE_THAN_MAX_DIGITS?
     return *this;
 }
@@ -273,6 +276,9 @@ int32_t DecimalFormat::getAttribute(UNumberFormatAttribute attr, UErrorCode& sta
         case UNUM_MULTIPLIER:
             return getMultiplier();
 
+        case UNUM_SCALE:
+            return getScale();
+
         case UNUM_GROUPING_SIZE:
             return getGroupingSize();
 
@@ -311,7 +317,6 @@ int32_t DecimalFormat::getAttribute(UNumberFormatAttribute attr, UErrorCode& sta
             break;
     }
     // TODO: UNUM_FORMAT_FAIL_IF_MORE_THAN_MAX_DIGITS?
-    // TODO: UNUM_SCALE?
 
     return -1; /* undefined */
 }
@@ -657,6 +662,15 @@ void DecimalFormat::setMultiplier(int32_t multiplier) {
     refreshFormatterNoError();
 }
 
+int32_t DecimalFormat::getScale() const {
+    return fProperties->scaleMultiplier;
+}
+
+void DecimalFormat::setScale(int32_t newValue) {
+    fProperties->scaleMultiplier = newValue;
+    refreshFormatterNoError();
+}
+
 double DecimalFormat::getRoundingIncrement(void) const {
     return fExportedProperties->roundingIncrement;
 }
diff --git a/icu4c/source/i18n/number_decimfmtprops.cpp b/icu4c/source/i18n/number_decimfmtprops.cpp
index f7d486d699e..412a04d8f35 100644
--- a/icu4c/source/i18n/number_decimfmtprops.cpp
+++ b/icu4c/source/i18n/number_decimfmtprops.cpp
@@ -54,6 +54,7 @@ void DecimalFormatProperties::clear() {
     positiveSuffixPattern.setToBogus();
     roundingIncrement = 0.0;
     roundingMode.nullify();
+    scaleMultiplier = 0;
     secondaryGroupingSize = -1;
     signAlwaysShown = false;
 }
@@ -98,6 +99,7 @@ bool DecimalFormatProperties::operator==(const DecimalFormatProperties &other) c
     eq = eq && positiveSuffixPattern == other.positiveSuffixPattern;
     eq = eq && roundingIncrement == other.roundingIncrement;
     eq = eq && roundingMode == other.roundingMode;
+    eq = eq && scaleMultiplier == other.scaleMultiplier;
     eq = eq && secondaryGroupingSize == other.secondaryGroupingSize;
     eq = eq && signAlwaysShown == other.signAlwaysShown;
     return eq;
diff --git a/icu4c/source/i18n/number_decimfmtprops.h b/icu4c/source/i18n/number_decimfmtprops.h
index 4ad3225ba39..2cac011c7d6 100644
--- a/icu4c/source/i18n/number_decimfmtprops.h
+++ b/icu4c/source/i18n/number_decimfmtprops.h
@@ -128,6 +128,7 @@ struct U_I18N_API DecimalFormatProperties {
     UnicodeString positiveSuffixPattern;
     double roundingIncrement;
     NullableValue<RoundingMode> roundingMode;
+    int32_t scaleMultiplier;
     int32_t secondaryGroupingSize;
     bool signAlwaysShown;
 
diff --git a/icu4c/source/i18n/unicode/decimfmt.h b/icu4c/source/i18n/unicode/decimfmt.h
index ee6db91d1c5..1ce1ea93981 100644
--- a/icu4c/source/i18n/unicode/decimfmt.h
+++ b/icu4c/source/i18n/unicode/decimfmt.h
@@ -1320,6 +1320,7 @@ class U_I18N_API DecimalFormat : public NumberFormat {
      * For a percentage, set the suffixes to have "%" and the multiplier to be 100.
      * (For Arabic, use arabic percent symbol).
      * For a permill, set the suffixes to have "\\u2031" and the multiplier to be 1000.
+     * It is possible to set both via setMultiplier() as via setScale() simultaneously.
      *
      * @param newValue    the new value of the multiplier for use in percent, permill, etc.
      * Examples: with 100, 1.23 -> "123", and "123" -> 1.23
@@ -1327,6 +1328,27 @@ class U_I18N_API DecimalFormat : public NumberFormat {
      */
     virtual void setMultiplier(int32_t newValue);
 
+    /**
+     * Gets a multiplier for the given power of ten.
+     * For example, scale of 2 corresponds to a multiplier of 100.
+     *
+     * @return    the multiplier for use in percent, permill, etc.
+     * Examples: with 100, 1.23 -> "123", and "123" -> 1.23
+     * @draft ICU 62
+     */
+    int32_t getScale(void) const;
+
+    /**
+     * Sets a multiplier for the given power of ten.
+     * For example, scale of 2 corresponds to a multiplier of 100.
+     * It is possible to set both via setMultiplier() as via setScale() simultaneously.
+     *
+     * @param newValue    the new value of the multiplier for use in percent, permill, etc.
+     * Examples: with 100, 1.23 -> "123", and "123" -> 1.23
+     * @draft ICU 62
+     */
+    virtual void setScale(int32_t newValue);
+
     /**
      * Get the rounding increment.
      * @return A positive rounding increment, or 0.0 if a custom rounding
-- 
2.40.0